• Re: hobby electronics

    From DJ Delorie@21:1/5 to All on Tue Jul 2 13:03:50 2024
    john larkin <jlarkin_highland_tech> writes:
    It's my opinion that there are few hobbyists that really work with
    parts and make circuits, and most EE grads are EE/CE dual majors that
    code more than they solder, and don't have instincts for electricity.

    IMHO the term "hobby electronics" used to mean "soldering up radios" but
    now means "jumper wiring modules". Arduino, RPi, and ESP32 have made it trivial for anyone to wire up sensors and actuators.

    Where used to be a niche talent (designing transistors or ICs) has moved
    up the tree (designing modules) with the corresponding dearth of
    interested applicants.

    One can only hope that easy access to PCB manufacturing and assembly
    services will make the niche talents more popular.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Joe Gwinn@21:1/5 to All on Tue Jul 2 13:04:21 2024
    On Tue, 02 Jul 2024 09:28:17 -0700, john larkin
    <jlarkin_highland_tech> wrote:


    It's my opinion that there are few hobbyists that really work with
    parts and make circuits, and most EE grads are EE/CE dual majors that
    code more than they solder, and don't have instincts for electricity.

    Here's a youtube on the subject:

    https://www.youtube.com/watch?v=CLnolhyT5SI

    Some of these guys blame surface mount, which seems wrong to me. There
    are lots of thru-hole parts and parts kits around.

    I'd like to hire a few kids who love component-level electronics, but
    they are hard to find.

    Send your hunting teams out to radio amateur meetings. Bring nets.

    Joe Gwinn

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From john larkin @21:1/5 to All on Tue Jul 2 09:28:17 2024
    It's my opinion that there are few hobbyists that really work with
    parts and make circuits, and most EE grads are EE/CE dual majors that
    code more than they solder, and don't have instincts for electricity.

    Here's a youtube on the subject:

    https://www.youtube.com/watch?v=CLnolhyT5SI

    Some of these guys blame surface mount, which seems wrong to me. There
    are lots of thru-hole parts and parts kits around.

    I'd like to hire a few kids who love component-level electronics, but
    they are hard to find.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From john larkin @21:1/5 to All on Tue Jul 2 11:06:30 2024
    On Tue, 02 Jul 2024 13:04:21 -0400, Joe Gwinn <joegwinn@comcast.net>
    wrote:

    On Tue, 02 Jul 2024 09:28:17 -0700, john larkin
    <jlarkin_highland_tech> wrote:


    It's my opinion that there are few hobbyists that really work with
    parts and make circuits, and most EE grads are EE/CE dual majors that
    code more than they solder, and don't have instincts for electricity.

    Here's a youtube on the subject:

    https://www.youtube.com/watch?v=CLnolhyT5SI

    Some of these guys blame surface mount, which seems wrong to me. There
    are lots of thru-hole parts and parts kits around.

    I'd like to hire a few kids who love component-level electronics, but
    they are hard to find.

    Send your hunting teams out to radio amateur meetings. Bring nets.

    Joe Gwinn

    Is there still ham radio? Internet, cell phones, email, games,
    texting, and free long-distance seems to have killed that.

    I plan to explore the local maker spaces, hoping to find kids who like
    real electronics, or at least can program Raspberry Pi at low level.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Jan Panteltje@21:1/5 to All on Tue Jul 2 18:27:38 2024
    On a sunny day (Tue, 02 Jul 2024 09:28:17 -0700) it happened john larkin <jlarkin_highland_tech> wrote in <j5a88jhm7pge920n2io4jnhs101i8ntb2g@4ax.com>:


    It's my opinion that there are few hobbyists that really work with
    parts and make circuits, and most EE grads are EE/CE dual majors that
    code more than they solder, and don't have instincts for electricity.

    Here's a youtube on the subject:

    https://www.youtube.com/watch?v=CLnolhyT5SI

    Some of these guys blame surface mount, which seems wrong to me. There
    are lots of thru-hole parts and parts kits around.

    Smurf mount is no problem:
    https://panteltje.nl/pub/test_board_wiring_side_IMG_3921.GIF
    can you spot the SMDs?
    BTW that is a 1.5 GHz or so mixer on the right
    https://panteltje.nl/pub/test_board_component_side_1_IMG_3911.GIF


    I'd like to hire a few kids who love component-level electronics, but
    they are hard to find.

    Yea... the old guys knew how to do moon landing and return
    Now boing starliner has its astronuts stuck at the ISS after spending billions. US IQ now a one digit number.

    But there are also good things
    Nice spectrum analyzer in a RTL-SDR USB stick where you needed a short wave radio before..

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Jan Panteltje@21:1/5 to All on Tue Jul 2 18:33:35 2024
    On a sunny day (Tue, 02 Jul 2024 11:06:30 -0700) it happened john larkin <jlarkin_highland_tech> wrote in <35g88j19jj1g4rgtd9tk795cb883j12khj@4ax.com>:

    On Tue, 02 Jul 2024 13:04:21 -0400, Joe Gwinn <joegwinn@comcast.net>
    wrote:

    On Tue, 02 Jul 2024 09:28:17 -0700, john larkin
    <jlarkin_highland_tech> wrote:


    It's my opinion that there are few hobbyists that really work with
    parts and make circuits, and most EE grads are EE/CE dual majors that >>>code more than they solder, and don't have instincts for electricity.

    Here's a youtube on the subject:

    https://www.youtube.com/watch?v=CLnolhyT5SI

    Some of these guys blame surface mount, which seems wrong to me. There >>>are lots of thru-hole parts and parts kits around.

    I'd like to hire a few kids who love component-level electronics, but >>>they are hard to find.

    Send your hunting teams out to radio amateur meetings. Bring nets.

    Joe Gwinn

    Is there still ham radio? Internet, cell phones, email, games,
    texting, and free long-distance seems to have killed that.

    Well I do have an A license , we have our own satellites
    and a transponder on a geostatic one,
    Type 'QO100' in google.
    Many local nets exist too.
    I am not very active atm with ham stuff.


    I plan to explore the local maker spaces, hoping to find kids who like
    real electronics, or at least can program Raspberry Pi at low level.

    There is a raspberry newsgroup.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From boB@21:1/5 to All on Tue Jul 2 11:37:57 2024
    On Tue, 02 Jul 2024 11:06:30 -0700, john larkin
    <jlarkin_highland_tech> wrote:

    On Tue, 02 Jul 2024 13:04:21 -0400, Joe Gwinn <joegwinn@comcast.net>
    wrote:

    On Tue, 02 Jul 2024 09:28:17 -0700, john larkin
    <jlarkin_highland_tech> wrote:


    It's my opinion that there are few hobbyists that really work with
    parts and make circuits, and most EE grads are EE/CE dual majors that >>>code more than they solder, and don't have instincts for electricity.

    Here's a youtube on the subject:

    https://www.youtube.com/watch?v=CLnolhyT5SI

    Some of these guys blame surface mount, which seems wrong to me. There >>>are lots of thru-hole parts and parts kits around.

    I'd like to hire a few kids who love component-level electronics, but >>>they are hard to find.

    Send your hunting teams out to radio amateur meetings. Bring nets.

    Joe Gwinn

    Is there still ham radio? Internet, cell phones, email, games,
    texting, and free long-distance seems to have killed that.


    No, amateur radio is still alive. Not as build it yourself as it once
    was but they are still out there and experimenting.

    I have been part of some STEM demonstrations and STEM science fairs
    where the young people of today, the old people of tomorrow, are
    impressionable and interested I think. They REALLY like Jacob's
    ladders ! They also seemed to like playing with the soldering iron
    and trying to make connections which was also part of my STEM table.

    Yeah, it's not the same as it was when we were growing up but I think
    you just have to find the right ones and mentor them. Some might even
    stay on the one job and want to learn more and actually be useful to
    your/my company.

    boB



    I plan to explore the local maker spaces, hoping to find kids who like
    real electronics, or at least can program Raspberry Pi at low level.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Joe Gwinn@21:1/5 to All on Tue Jul 2 14:38:14 2024
    On Tue, 02 Jul 2024 11:06:30 -0700, john larkin
    <jlarkin_highland_tech> wrote:

    On Tue, 02 Jul 2024 13:04:21 -0400, Joe Gwinn <joegwinn@comcast.net>
    wrote:

    On Tue, 02 Jul 2024 09:28:17 -0700, john larkin
    <jlarkin_highland_tech> wrote:


    It's my opinion that there are few hobbyists that really work with
    parts and make circuits, and most EE grads are EE/CE dual majors that >>>code more tShan they solder, and don't have instincts for electricity.

    Here's a youtube on the subject:

    https://www.youtube.com/watch?v=CLnolhyT5SI

    Some of these guys blame surface mount, which seems wrong to me. There >>>are lots of thru-hole parts and parts kits around.

    I'd like to hire a few kids who love component-level electronics, but >>>they are hard to find.

    Send your hunting teams out to radio amateur meetings. Bring nets.

    Joe Gwinn

    Is there still ham radio? Internet, cell phones, email, games,
    texting, and free long-distance seems to have killed that.

    There is, but it's graying to be sure.

    Most of the deep-dyed RF engineers I work with are hams. They also
    attend SciFi cosplay conventions.

    .<https://w6aer.com/list-of-san-francisco-bay-area-ham-radio-clubs/>


    I plan to explore the local maker spaces, hoping to find kids who like
    real electronics, or at least can program Raspberry Pi at low level.

    Probably will be mostly robot makers - RF is so ... technical ...

    Joe Gwinn

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Gerhard Hoffmann@21:1/5 to Jan Panteltje on Tue Jul 2 23:06:54 2024
    Am 02.07.24 um 20:27 schrieb Jan Panteltje:

    Smurf mount is no problem:
    https://panteltje.nl/pub/test_board_wiring_side_IMG_3921.GIF
    can you spot the SMDs?
    BTW that is a 1.5 GHz or so mixer on the right
    https://panteltje.nl/pub/test_board_component_side_1_IMG_3911.GIF

    I do not like the board material. Using perf board does not
    mean you have to give up acceptable ground.

    < https://www.flickr.com/photos/137684711@N07/44311358915/in/datetaken/lightbox/
    >

    Board material with ground mesh is from www.segor.de who were my
    local source in subway distance when I still was in Berlin.

    There is even nicer material from Vero, but it costs > 10 dB more.

    BTW this is a single sided version of Win's ribbon micro preamp
    with 70 pV rthz noise as shown in W & H's AOE3.
    Works as promised.

    Has anybody here heard of Win recently?

    cheers, Gerhard DK4XP

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Gerhard Hoffmann@21:1/5 to All on Tue Jul 2 23:32:17 2024
    Am 02.07.24 um 20:06 schrieb john larkin:

    Is there still ham radio? Internet, cell phones, email, games,
    texting, and free long-distance seems to have killed that.

    .... and that just 2 days after the local HamRadio 2024 exhibition with
    > 11000 visitors in Friedrichshafen where Austria, Switzerland and
    Germany touch.

    <
    https://www.hamradio-friedrichshafen.com/trade-show-program/hall-plan >

    There was a pro contact market, too, and exhibitors like R&S and Rigol..

    I plan to explore the local maker spaces, hoping to find kids who like
    real electronics, or at least can program Raspberry Pi at low level.

    cheers, Gerhard

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Cursitor Doom@21:1/5 to Gerhard Hoffmann on Tue Jul 2 22:41:34 2024
    On Tue, 2 Jul 2024 23:06:54 +0200, Gerhard Hoffmann wrote:

    Am 02.07.24 um 20:27 schrieb Jan Panteltje:

    Smurf mount is no problem:
    https://panteltje.nl/pub/test_board_wiring_side_IMG_3921.GIF
    can you spot the SMDs?
    BTW that is a 1.5 GHz or so mixer on the right
    https://panteltje.nl/pub/test_board_component_side_1_IMG_3911.GIF

    I do not like the board material. Using perf board does not mean you
    have to give up acceptable ground.

    <
    https://www.flickr.com/photos/137684711@N07/44311358915/in/datetaken/
    lightbox/
    >
    >
    Board material with ground mesh is from www.segor.de who were my local
    source in subway distance when I still was in Berlin.

    When I lived there the Conrad shops were very good for discretes and way
    better than their UK equivalent, Maplin - or even Tandy/Radio Shack for
    that matter. I'm guessing they've probably cut right back on the discretes
    by now though. :(

    There is even nicer material from Vero, but it costs > 10 dB more.

    BTW this is a single sided version of Win's ribbon micro preamp with 70
    pV rthz noise as shown in W & H's AOE3.
    Works as promised.

    Has anybody here heard of Win recently?

    cheers, Gerhard DK4XP

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Cursitor Doom@21:1/5 to john larkin on Tue Jul 2 22:34:03 2024
    On Tue, 02 Jul 2024 11:06:30 -0700, john larkin wrote:

    On Tue, 02 Jul 2024 13:04:21 -0400, Joe Gwinn <joegwinn@comcast.net>
    wrote:

    On Tue, 02 Jul 2024 09:28:17 -0700, john larkin <jlarkin_highland_tech> >>wrote:


    It's my opinion that there are few hobbyists that really work with
    parts and make circuits, and most EE grads are EE/CE dual majors that >>>code more than they solder, and don't have instincts for electricity.

    Here's a youtube on the subject:

    https://www.youtube.com/watch?v=CLnolhyT5SI

    Some of these guys blame surface mount, which seems wrong to me. There >>>are lots of thru-hole parts and parts kits around.

    I'd like to hire a few kids who love component-level electronics, but >>>they are hard to find.

    Send your hunting teams out to radio amateur meetings. Bring nets.

    Joe Gwinn

    Is there still ham radio? Internet, cell phones, email, games, texting,
    and free long-distance seems to have killed that.

    Go to any ham rally and you'll be lucky to find anyone under 50 nowadays. You'll find plenty of people over 70, though! Not what you're looking for obviously, but it's the sad truth.


    I plan to explore the local maker spaces, hoping to find kids who like
    real electronics, or at least can program Raspberry Pi at low level.

    When PCs became affordable thanks to the likes of Sinclair with his
    ZX80/81, Spectrum etc., an awful lot of kids who would have ventured into electronics and radio ended up being seduced into the digital world and
    never looked back. That's a big factor here, too.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Don Y@21:1/5 to boB on Tue Jul 2 15:17:24 2024
    On 7/2/2024 11:37 AM, boB wrote:
    No, amateur radio is still alive. Not as build it yourself as it once
    was but they are still out there and experimenting.

    The fact that the code test was dropped is telling. There are lots of
    things one can use to "distract oneself" so a high bar is easily avoided.

    I have been part of some STEM demonstrations and STEM science fairs
    where the young people of today, the old people of tomorrow, are impressionable and interested I think. They REALLY like Jacob's
    ladders ! They also seemed to like playing with the soldering iron
    and trying to make connections which was also part of my STEM table.

    We're developing a STEM curriculum to augment the public schools'.
    So, I've been visiting makerspaces, robot clubs, etc.

    A few observations:
    - the need to "go somewhere" to engage in an activity must typically
    be offset by a social aspect of that activity -- wanting to work
    on something "together" (e.g., ASSEMBLE a robot) or have on-hand
    feedback to help evolve your design.
    - the need for special tools (that can also require special *spaces*)
    disincentivizes many activities. I am always amused that folks
    will pay $50+ monthly to *use* the tools in a makerspace (Why not
    just budget $600/yr for tools of your own? Ans: they may not
    have the space -- or monies -- to make such an investment)
    - insecurity; the need to have one's hand held. Or, the availability
    of (near instant) feedback to get through a problem. The need for
    independant thought and persistence rules out many activities (participants).
    - knowledge deficits. How much does it "cost" you to learn -- if your
    learning process is primarily "by mistakes"? Can you afford the time/money
    to attempt a task twice? thrice? hundreds of times?

    IMO, this is why folks have gravitated to programming and lego-style
    module interconnect; the "hard work" has been done and *their* efforts
    can proceed with little concern for additional cost (beyond the time
    it takes to make and correct their mistakes -- words on a screen).

    [I'm thinking back to when I was doing full customs and the stress
    associated with releasing a design to the foundry. The apprehension
    over what I might have failed to test or some little error that
    the DRCs weren't capable of detecting. "What are the chances that
    I'll be eating tens of kilobucks of 'crow' when the first silicon
    is returned a few MONTHS hence?"]

    Sadly, it prewires their brains to expect the sorts of designs that others (module builders) have envisioned. Their minds are molded to The Box
    because they don't consider the nature of the modules as something that
    can be questioned.

    So, you get more uninspired "programmers" adapting to the notions of
    the hardware designers behind the modules they've employed.

    Yeah, it's not the same as it was when we were growing up but I think
    you just have to find the right ones and mentor them. Some might even
    stay on the one job and want to learn more and actually be useful to
    your/my company.

    Most will likely want to move into management because engineering requires constant learning. After their "youthful enthusiasm" fades and the pressures of a family settle on them, they more often just want a stable paycheck;
    NOT to have to jump to unreasonable schedules IMPOSED on them (by folks
    who long ago forgot how to do engineering -- assuming they ever *did*!)

    [A group of us meet for offsites ~quarterly. It is depressing to see
    the defeat in the eyes of those who have left engineering for other
    "income sources". They remember the excitement of seeing (or creating)
    a clever design. Yet, struggle to understand those aspects of the designs
    that we (engineers) exchange and demonstrate.]

    How many employers actually put "meeting the needs of their employees"
    on their list of operating criteria? Most want to refine your skillset
    so you are more effective at "doing X" -- not *diversifying* it so you
    get a taste for Y and Z, as well. And, as most employees feel strapped
    to their income stream, they have little practical recourse. (How strong
    of an effort do you think that motivates them to put into "X"?)

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From john larkin @21:1/5 to All on Tue Jul 2 15:42:45 2024
    On Tue, 2 Jul 2024 23:06:54 +0200, Gerhard Hoffmann <dk4xp@arcor.de>
    wrote:

    Am 02.07.24 um 20:27 schrieb Jan Panteltje:

    Smurf mount is no problem:
    https://panteltje.nl/pub/test_board_wiring_side_IMG_3921.GIF
    can you spot the SMDs?
    BTW that is a 1.5 GHz or so mixer on the right
    https://panteltje.nl/pub/test_board_component_side_1_IMG_3911.GIF

    I do not like the board material. Using perf board does not
    mean you have to give up acceptable ground.

    < >https://www.flickr.com/photos/137684711@N07/44311358915/in/datetaken/lightbox/
    >

    Board material with ground mesh is from www.segor.de who were my
    local source in subway distance when I still was in Berlin.

    There is even nicer material from Vero, but it costs > 10 dB more.

    BTW this is a single sided version of Win's ribbon micro preamp
    with 70 pV rthz noise as shown in W & H's AOE3.
    Works as promised.

    Has anybody here heard of Win recently?

    cheers, Gerhard DK4XP


    Adapters with wire isn't difficult.

    https://www.dropbox.com/scl/fi/p7o1vrtcqbop0je3va1r8/D140_Proto.JPG?rlkey=g18jcaqlevfk4ex4bj3efox1z&raw=1

    https://www.dropbox.com/scl/fi/3h6qxsp3swq6p7mb4h3my/D200_BB_3.jpg?rlkey=afkx84wah5xmkaud0tqx57uzx&raw=1

    https://www.dropbox.com/scl/fi/t8q4luubibzlr6oqyrlim/Z338_PCB.JPG?rlkey=o23l9jq8y81n7799po4quof18&raw=1

    or of course, Dremel, with ground plane on the far side.

    https://www.dropbox.com/scl/fi/ydvcds95zvzjq56bzeimr/Z412_Proto.JPG?rlkey=hyejukxbbnk3573engf0if4zt&raw=1

    https://www.dropbox.com/scl/fi/f3redjl7umja5v8tsi2p5/Z382_1.JPG?rlkey=epclqs4lkx2cmdakne390bbae&raw=1

    I don't like protos with parts on one side and wires on the other. I
    can't see the connections. And once a proto is all hooked up, with
    power connections and cables and things, I don't want to flip it over
    to make changes.

    Haven't heard from H or H in ages.

    I need a microvolt precise unity-gain follower with nV and fA noise
    and low bias current, but no opamp like that exists, and jfets are too
    drifty.

    AD8675 is about the closest I can find.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Don@21:1/5 to Gerhard Hoffmann on Tue Jul 2 22:49:20 2024
    Gerhard Hoffmann wrote:

    <snip>

    .... and that just 2 days after the local HamRadio 2024 exhibition with
    11000 visitors in Friedrichshafen where Austria, Switzerland and
    Germany touch.

    <
    https://www.hamradio-friedrichshafen.com/trade-show-program/hall-plan >

    There was a pro contact market, too, and exhibitors like R&S and Rigol..

    Last weekend was Field Day here in the USA. It was a very hot, cloudless
    day in my town and too much direct sunlight overheated the club's ham
    radio spectrum analyzer.

    Danke,

    --
    Don, KB7RPU, https://www.qsl.net/kb7rpu
    There was a young lady named Bright Whose speed was far faster than light;
    She set out one day In a relative way And returned on the previous night.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From john larkin @21:1/5 to cd999666@notformail.com on Tue Jul 2 15:47:27 2024
    On Tue, 2 Jul 2024 22:34:03 -0000 (UTC), Cursitor Doom <cd999666@notformail.com> wrote:

    On Tue, 02 Jul 2024 11:06:30 -0700, john larkin wrote:

    On Tue, 02 Jul 2024 13:04:21 -0400, Joe Gwinn <joegwinn@comcast.net>
    wrote:

    On Tue, 02 Jul 2024 09:28:17 -0700, john larkin <jlarkin_highland_tech> >>>wrote:


    It's my opinion that there are few hobbyists that really work with >>>>parts and make circuits, and most EE grads are EE/CE dual majors that >>>>code more than they solder, and don't have instincts for electricity.

    Here's a youtube on the subject:

    https://www.youtube.com/watch?v=CLnolhyT5SI

    Some of these guys blame surface mount, which seems wrong to me. There >>>>are lots of thru-hole parts and parts kits around.

    I'd like to hire a few kids who love component-level electronics, but >>>>they are hard to find.

    Send your hunting teams out to radio amateur meetings. Bring nets.

    Joe Gwinn

    Is there still ham radio? Internet, cell phones, email, games, texting,
    and free long-distance seems to have killed that.

    Go to any ham rally and you'll be lucky to find anyone under 50 nowadays. >You'll find plenty of people over 70, though! Not what you're looking for >obviously, but it's the sad truth.


    I plan to explore the local maker spaces, hoping to find kids who like
    real electronics, or at least can program Raspberry Pi at low level.

    When PCs became affordable thanks to the likes of Sinclair with his
    ZX80/81, Spectrum etc., an awful lot of kids who would have ventured into >electronics and radio ended up being seduced into the digital world and
    never looked back. That's a big factor here, too.

    And one can get an EE degree now without learning much about
    electricity. And I suspect that the big IC companies scoop up the few
    that do.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Don@21:1/5 to Gerhard Hoffmann on Tue Jul 2 22:54:02 2024
    Gerhard Hoffmann wrote:

    <snip>

    .... and that just 2 days after the local HamRadio 2024 exhibition with
    11000 visitors in Friedrichshafen where Austria, Switzerland and
    Germany touch.

    <
    https://www.hamradio-friedrichshafen.com/trade-show-program/hall-plan >

    There was a pro contact market, too, and exhibitors like R&S and Rigol..

    Correction. The weekend before last was Field Day here in the USA. It was
    a very hot, cloudless day in my town and too much direct sunlight
    overheated the club's ham radio spectrum analyzer.

    Danke,

    --
    Don, KB7RPU, https://www.qsl.net/kb7rpu
    There was a young lady named Bright Whose speed was far faster than light;
    She set out one day In a relative way And returned on the previous night.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Bill Sloman@21:1/5 to john larkin on Wed Jul 3 13:49:07 2024
    On 3/07/2024 8:42 am, john larkin wrote:
    On Tue, 2 Jul 2024 23:06:54 +0200, Gerhard Hoffmann <dk4xp@arcor.de>
    wrote:

    Am 02.07.24 um 20:27 schrieb Jan Panteltje:

    <snip>


    I need a microvolt precise unity-gain follower with nV and fA noise
    and low bias current, but no opamp like that exists, and jfets are too drifty.

    AD8675 is about the closest I can find.

    If you temperature stabilised your junction FET to a milli-degree or so,
    it would be less drifty.

    There are monolithic dual junction FETs

    https://mm.digikey.com/Volume0/opasdata/d220001/medias/docus/5535/7e8069_e8cb0edf8dc64ae79ae575c7a40c2828.pdf

    --
    Bill Sloman, Sydney

    --
    This email has been checked for viruses by Norton antivirus software. www.norton.com

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  • From Gerhard Hoffmann@21:1/5 to All on Wed Jul 3 05:24:14 2024
    Am 03.07.24 um 00:41 schrieb Cursitor Doom:

    When I lived there the Conrad shops were very good for discretes and way better than their UK equivalent, Maplin - or even Tandy/Radio Shack for
    that matter. I'm guessing they've probably cut right back on the discretes
    by now though. :(

    They did cut back... but the number of Conrad shops.
    All but one. The rest is online biz only.

    Cheers, Gerhard

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  • From Gerhard Hoffmann@21:1/5 to All on Wed Jul 3 06:33:24 2024
    Am 03.07.24 um 00:42 schrieb john larkin:

    I don't like protos with parts on one side and wires on the other. I
    can't see the connections. And once a proto is all hooked up, with
    power connections and cables and things, I don't want to flip it over
    to make changes.

    From subcircuits that have shown some value I tend to make stamp
    sized boards, like the *10 *10 ADA4898-2 post amplifier at the right
    in the ribbon preamp. My 1h laser printer to solder home etching
    process helps.

    Haven't heard from H or H in ages.

    s.e.d. used to be a nice place back then!

    I need a microvolt precise unity-gain follower with nV and fA noise
    and low bias current, but no opamp like that exists, and jfets are too drifty.

    AD8675 is about the closest I can find.

    I have played with Bob Widlar's bipolar super-beta voltage follower.
    It looks quite promising. Where else do you get gain = 1.000 just so?
    Noise density is OK, too.
    More transistors seem not to help any further.
    More current, yes. Q4 and Q5 are just parking lots.

    It would be interesting how a LM108 on today's hot processes would
    look like.

    < https://www.flickr.com/photos/137684711@N07/53830817262/in/dateposted-public/lightbox/
    >

    I'm typing-challenged because I hurt my right shoulder yesterday :-(

    cheers, Gerhard

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  • From Jan Panteltje@21:1/5 to dk4xp@arcor.de on Wed Jul 3 06:20:36 2024
    On a sunny day (Tue, 2 Jul 2024 23:06:54 +0200) it happened Gerhard Hoffmann <dk4xp@arcor.de> wrote in <2812ea71-eadb-4591-b3ff-97e3d6ee06f9@arcor.de>:

    Am 02.07.24 um 20:27 schrieb Jan Panteltje:

    Smurf mount is no problem:
    https://panteltje.nl/pub/test_board_wiring_side_IMG_3921.GIF
    can you spot the SMDs?
    BTW that is a 1.5 GHz or so mixer on the right
    https://panteltje.nl/pub/test_board_component_side_1_IMG_3911.GIF

    I do not like the board material. Using perf board does not
    mean you have to give up acceptable ground.

    < >https://www.flickr.com/photos/137684711@N07/44311358915/in/datetaken/lightbox/

    Nice,
    https://www.panteltje.nl/pub/8052AH_BASIC_computer/8052AH_BASIC_computer_inside2_img_1757.jpg
    https://www.panteltje.nl/pub/8052AH_BASIC_computer/8052AH_BASIC_computer_wiring_img_1756.jpg
    who needs peeseebees?
    That thing still works.
    It also has an EPROM programmer
    about 1986 I build that... it controlled my home security system for a while. wrote some assembler for it:
    https://panteltje.nl/panteltje/newsflex/a52-2.0.lsm
    https://panteltje.nl/panteltje/newsflex/a52-2.0.tgz


    Board material with ground mesh is from www.segor.de who were my
    local source in subway distance when I still was in Berlin.

    There is even nicer material from Vero, but it costs > 10 dB more.

    BTW this is a single sided version of Win's ribbon micro preamp
    with 70 pV rthz noise as shown in W & H's AOE3.
    Works as promised.

    Has anybody here heard of Win recently?

    cheers, Gerhard DK4XP

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  • From Martin Brown@21:1/5 to john larkin on Wed Jul 3 10:30:39 2024
    On 02/07/2024 17:28, john larkin wrote:

    It's my opinion that there are few hobbyists that really work with
    parts and make circuits, and most EE grads are EE/CE dual majors that
    code more than they solder, and don't have instincts for electricity.

    There are still a few, but it has become a very minority interest today.
    Partly because everything is so heavily integrated and surface mount.

    When I grew up you could get dead ICL 1900 boards full of TTL chips for
    and bags dross coated transistors at start of line for pennies. Today
    there is no equivalent source of cheap easily reused parts.

    Back then there were also electronic kits for build your own computer etc.

    A lot of it today is plugging new mass produced modules together.
    Raspberry Pi has done a lot for that and to encourage electronics
    hobbyists though so it isn't all bad news.

    Here's a youtube on the subject:

    https://www.youtube.com/watch?v=CLnolhyT5SI

    Some of these guys blame surface mount, which seems wrong to me. There
    are lots of thru-hole parts and parts kits around.

    Surface mount has rendered modern kit all but impossible for the home
    user to repair. I cut my teeth mending transistor car radios back when
    chassis earth was chosen randomly by each car manufacturer to be either positive or negative and people blew up their brand new car radios.

    The other big earner was mending teenage wannabe rock stars amplifiers
    that had their output transistors fried or a pint of beer in them.

    I'd like to hire a few kids who love component-level electronics, but
    they are hard to find.

    Go looking at maker-spaces or whatever they are called in the US. Most
    of them will be trying to make electric guitars but they will be showing
    at least some skills with small pickup coils and low noise amplifiers.

    Back in my day a lot of our physics practicals were essentially
    electronics based - characteristics of a FET, various oscillators and a substantial digital electronics and logic course with a finishing test
    of making a digital dice (it may still be the same course even now).

    I'm pretty sure the previous generation did the same experiments on
    thermionic valves and relays but that was discontinued on H&S grounds.

    --
    Martin Brown

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  • From Phil Hobbs@21:1/5 to Martin Brown on Wed Jul 3 12:03:26 2024
    Martin Brown <'''newspam'''@nonad.co.uk> wrote:
    On 02/07/2024 17:28, john larkin wrote:

    It's my opinion that there are few hobbyists that really work with
    parts and make circuits, and most EE grads are EE/CE dual majors that
    code more than they solder, and don't have instincts for electricity.

    There are still a few, but it has become a very minority interest today. Partly because everything is so heavily integrated and surface mount.

    When I grew up you could get dead ICL 1900 boards full of TTL chips for
    and bags dross coated transistors at start of line for pennies. Today
    there is no equivalent source of cheap easily reused parts.

    Sure there is. Digikey, for one. Larger SMT parts such as SOICs can be
    used dead bug style, and there are still lots of DIP packages around, especially the older parts that are good for hacking around with.

    Smaller SMTs can be put on little breakouts (sold for cheap by, e. g.
    Bellin, via Newark/Farnell) and mounted on Cu-clad with foam double sticky tape.

    It’s harder for a beginner to figure all that out on his own, but I would have made a lot faster progress than I did, what with a loopstick coil
    costing a week‘s pocket money.

    Cheers

    Phil Hobbs

    --
    Dr Philip C D Hobbs Principal Consultant ElectroOptical Innovations LLC / Hobbs ElectroOptics Optics, Electro-optics, Photonics, Analog Electronics

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  • From Don Y@21:1/5 to Martin Brown on Wed Jul 3 04:16:02 2024
    On 7/3/2024 2:30 AM, Martin Brown wrote:
    There are still a few, but it has become a very minority interest today. Partly
    because everything is so heavily integrated and surface mount.

    The other important issue you're forgetting is how *inexpensive* everything (finished electronic product) is, today.

    I love designing unique timepieces. But, I can't beat the price of other "unique" products on the market. Why take on the effort if you're willing
    to "settle" for something that you can buy for an hour's minimum wage pay?
    Ans: you need to be TRULY unique (I've designed a sundial with a regular
    clock face -- 30 degrees per hour -- that keeps "perfect" time, even at night!).

    When I grew up you could get dead ICL 1900 boards full of TTL chips for and bags dross coated transistors at start of line for pennies. Today there is no equivalent source of cheap easily reused parts.

    In school, I had access to the scrap pile at DEC Maynard. In theory, ASSEMBLE an 8, 10, 11, etc. from "discarded" pieces. But, to what end? Just to say
    you have one in your dorm room?

    A friend built (wire-wrap) a small 8080 system writing all the tools from scratch, his own OS, applications, etc. But, had access to a different minicomputer with more ESTABLISHED capabilities in each of his classes.
    I.e., there was no practical value to having his own computer. And, as
    it relied heavily on LSI for its functionality, it was essentially a
    "plug together" system built out of modules called "chips".

    OTOH, I recall designing a CDI for the car I was driving, at the time. And, experimenting with using the conventional ignition vs. the CDI to see if
    any significant differences could be detected in performance, power, etc.
    It got me interested in *non-electronic* aspects of automotive systems.

    Back then there were also electronic kits for build your own computer etc.

    A lot of it today is plugging new mass produced modules together. Raspberry Pi
    has done a lot for that and to encourage electronics hobbyists though so it isn't all bad news.

    Their attention turns to 3D printing cases for these sorts of things.
    I saw a guy hack together (his interpretation of) a "tricorder" out of
    COTS modules. Likely more functional than the TV props but, beyond
    the novelty, what value that a cell phone doesn't already have in a
    bigger way?

    Go looking at maker-spaces or whatever they are called in the US. Most of them
    will be trying to make electric guitars but they will be showing at least some
    skills with small pickup coils and low noise amplifiers.

    Electric guitars (and 98+% of the effort will be in CAD, woodworking and cosmetics), bicycles, other large steel assemblies (outdoor tables), furniture, fountain pens, cabinetry to house MAME systems, etc.

    But, very little "electronics from scratch" -- despite having a Metcal, Mantis, assorted benchtop test gear and a huge selection of donated components. The bench always looks clear whenever I've been there. *Maybe* someone uses it
    to repair something "precious"? But, it would truly have to BE precious to find someone investing the time to repair vs. simply replacing (an excuse to upgrade to a newer model).

    I work with a few non-profits that recycle e-waste. The quantities are
    simply staggering! And, much of it is fully operational at the time it is "discarded".

    [I've 30 (!) monitors on hand (three different sizes/models). If/when one shits the bed (I have 13 deployed), I swap it out for a spare and make a
    note to repair it, later. Likewise, the (1100W) power supplies in my workstations have a unique form factor. So, I have three spares on hand.
    Why would I want to replace a PC just because its power supply died? (I can fix the dead one at my leisure)]

    OTOH, neighbors simply drive out to one of the local stores (needn't even
    be an "electronics" store!) and consider it par for the course. You can buy four or five 85 inch TVs (to use as monitors) for the price of my first PC!
    So, what's to "save" by repair?

    Back in my day a lot of our physics practicals were essentially electronics based - characteristics of a FET, various oscillators and a substantial digital
    electronics and logic course with a finishing test of making a digital dice (it
    may still be the same course even now).

    We used to make decade counters out of DTL/RTL on perf-board. They were more exercises in "packaging" as you'd just keep adding "slices" to a multilayer stack of small postage stamp sized subcircuits. But, how many counters can
    you actually make use of?

    As a young kid, my uncles wanted to lay claim to some semi trailers that had been parked on their (business) property for several years. They contained
    the pin-setters that had been removed from a nearby bowling alley that had gone tits up. Wrap a steel cable around the wooden skid under each pin-setter,
    tie to rear bumper of a truck, drag skid out of trailer and let it crash
    to the ground. (!) I went hog-wild salvaging relays and mechanisms from them and repurposing for other projects, at home. But, there were no commercial alternatives to the things that I was making, at the time (digital locks, games, clocks, etc).

    I'm pretty sure the previous generation did the same experiments on thermionic
    valves and relays but that was discontinued on H&S grounds.

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  • From Jan Panteltje@21:1/5 to '''newspam'''@nonad.co.uk on Wed Jul 3 12:20:30 2024
    On a sunny day (Wed, 3 Jul 2024 10:30:39 +0100) it happened Martin Brown <'''newspam'''@nonad.co.uk> wrote in <v635o1$24goj$1@dont-email.me>:

    On 02/07/2024 17:28, john larkin wrote:

    It's my opinion that there are few hobbyists that really work with
    parts and make circuits, and most EE grads are EE/CE dual majors that
    code more than they solder, and don't have instincts for electricity.

    There are still a few, but it has become a very minority interest today. >Partly because everything is so heavily integrated and surface mount.

    When I grew up you could get dead ICL 1900 boards full of TTL chips for
    and bags dross coated transistors at start of line for pennies. Today
    there is no equivalent source of cheap easily reused parts.

    Back then there were also electronic kits for build your own computer etc.

    A lot of it today is plugging new mass produced modules together.
    Raspberry Pi has done a lot for that and to encourage electronics
    hobbyists though so it isn't all bad news.

    Here's a youtube on the subject:

    https://www.youtube.com/watch?v=CLnolhyT5SI

    Some of these guys blame surface mount, which seems wrong to me. There
    are lots of thru-hole parts and parts kits around.

    Surface mount has rendered modern kit all but impossible for the home
    user to repair.

    No, its even easier than say resistors with wires through holes
    While back I replaced a surface mount resistor in a digital mulimeter.
    It had evaporated.
    The difficult part was guessing the value from the other surface mount resistors around it.
    SMDs are easy to unsolder and remove and replace.


    I cut my teeth mending transistor car radios back when
    chassis earth was chosen randomly by each car manufacturer to be either >positive or negative and people blew up their brand new car radios.

    The other big earner was mending teenage wannabe rock stars amplifiers
    that had their output transistors fried or a pint of beer in them.

    In those early sixties I designed and build a tube amplifier for the high school band,
    years later I got a call from the guitarist who really liked the sound
    if I could make some special effects stuff...
    I grew up with tubes and 78 rpm records ..



    I'd like to hire a few kids who love component-level electronics, but
    they are hard to find.

    Go looking at maker-spaces or whatever they are called in the US. Most
    of them will be trying to make electric guitars but they will be showing
    at least some skills with small pickup coils and low noise amplifiers.

    Back in my day a lot of our physics practicals were essentially
    electronics based - characteristics of a FET, various oscillators and a >substantial digital electronics and logic course with a finishing test
    of making a digital dice (it may still be the same course even now).

    I'm pretty sure the previous generation did the same experiments on >thermionic valves and relays but that was discontinued on H&S grounds.

    Teachers, in electronics school we had an old teacher teaching us about transistors
    and a student asked:
    'Sir, what exactly is a complementary pair?'
    Teacher got mad, thought it waa a sex joke, and asked the guy to leave the class.
    Took all of us to convince the teacher that that was a valid question.

    So, there but for what you learned yourself go you and I..

    But I am a bit diffferent, knew more about radio at 5 years old than some profies.
    Much I learend fron E Aisberg's books... Dutch for 'That is how the radio works':
    http://waij.com/oldbooks/radio_bestanden/Zoo_werkt_de_radio.pdf
    Mother got it for me from the library, was too young to get it myself.
    Later he also wrote 'That is how TV works', and 'That is how the transistor works'
    French:
    https://fr.wikipedia.org/wiki/Eug%C3%A8ne_Aisberg

    I don't know if there ever was an English translation, but THAT is good stuff to teach kids...
    I just downloaded the Dutch pdf, good memories! Still all valid!
    He starts with electrons and protons, atoms, the book had an 'ask all' and a 'know all' person
    in conversation about it all...
    Asking the right questions and getting the right answeres is a great way to quickly learn.

    I started learning French here ik kindergarten in the late forties..
    Do English ever learn French? German?

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  • From Martin Brown@21:1/5 to Jan Panteltje on Wed Jul 3 13:46:18 2024
    On 03/07/2024 13:20, Jan Panteltje wrote:

    I started learning French here ik kindergarten in the late forties..
    Do English ever learn French? German?

    Yes but far too late to be much use. Since Brexit there is even less
    teaching of modern languages. English people have now become as lazy as Americans and so expect everyone to speak English. My 1970's state
    secondary school had a language lab with tape recorders and headsets for everybody and taught French, German, Spanish, Greek & Latin.

    Everybody did French at first. Those that had done it at primary school
    had a massive head start which we never regained. If you were any good
    at it you could choose Latin or Greek. I chose Latin. I found I was much
    better at ancient languages that didn't require speaking them!

    Most educated Dutch or Swiss people I have encountered are fluent in at
    least three languages. I had one intern from U Twente who was brilliant.

    I learned some Russian at university too (for reading scientific papers)
    and then later Japanese by immersion in Japan. In Belgium my Flemish was
    just about good enough to get by - my wife's was better.

    --
    Martin Brown

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  • From BillGill@21:1/5 to Martin Brown on Wed Jul 3 08:34:08 2024
    On 7/3/2024 4:30 AM, Martin Brown wrote:
    Go looking at maker-spaces or whatever they are called in the US. Most
    of them will be trying to make electric guitars but they will be showing
    at least some skills with small pickup coils and low noise amplifiers.

    Here in Tulsa, Oklahoma, USA we have a Maker Faire
    every August (Saturday, August 24, this year).

    I have been going regularly, in fact I have shown my
    stuff (how to digitize a print book) for several years.
    They have a lot of interesting stuff, but not the sort
    of thing this thread has been talking about. Lots of
    foods, drones, and other stuff, such as costumes.
    But not much in the way of stuff built from electronic
    components, unless you count the small computers used to
    controls the working systems.

    I think somebody has said that by using the various small
    computers you can do a lot more complex things than you
    can with individual components. That is why you don't see
    many things that use individual components.

    Bill

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  • From legg@21:1/5 to All on Wed Jul 3 09:19:12 2024
    On Tue, 02 Jul 2024 09:28:17 -0700, john larkin
    <jlarkin_highland_tech> wrote:


    It's my opinion that there are few hobbyists that really work with
    parts and make circuits, and most EE grads are EE/CE dual majors that
    code more than they solder, and don't have instincts for electricity.

    Here's a youtube on the subject:

    https://www.youtube.com/watch?v=CLnolhyT5SI

    Some of these guys blame surface mount, which seems wrong to me. There
    are lots of thru-hole parts and parts kits around.

    I'd like to hire a few kids who love component-level electronics, but
    they are hard to find.

    . . . . auto mechanics . . . .

    . . . . guitar players . . . .

    . . . . landscape artists . . . .

    . . . . photographers . . . .

    . . . . woodworkers . . . .

    . . . . dressmakers . . . .

    . . . . leatherworkers . . . .

    . . . . anyone who can read/pronounce 'shone', 'would have', etc . . .
    . . . . handwriters - long or short . . . .

    but just throw a rock and you'll hit a grunpy old man.

    RL

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  • From Don Y@21:1/5 to BillGill on Wed Jul 3 06:57:59 2024
    On 7/3/2024 6:34 AM, BillGill wrote:
    On 7/3/2024 4:30 AM, Martin Brown wrote:
    Go looking at maker-spaces or whatever they are called in the US. Most of
    them will be trying to make electric guitars but they will be showing at
    least some skills with small pickup coils and low noise amplifiers.

    Here in Tulsa, Oklahoma, USA we have a Maker Faire
    every August (Saturday, August 24, this year).

    I have been going regularly, in fact I have shown my
    stuff (how to digitize a print book) for several years.

    Do you have a pointer to that information (looking for tips that
    I may not have discovered as I've been digitizing my dead trees)?

    They have a lot of interesting stuff, but not the sort
    of thing this thread has been talking about.  Lots of
    foods, drones, and other stuff, such as costumes.

    A young lady at the local maker house builds (feathered) "wings"
    on pneumatic actuators. Think: cosplay.

    But not much in the way of stuff built from electronic
    components, unless you count the small computers used to
    controls the working systems.

    I think somebody has said that by using the various small
    computers you can do a lot more complex things than you
    can with individual components.  That is why you don't see
    many things that use individual components.

    There is very little cost to making mistakes when writing code.
    Unless you are controlling some mechanism and have failed to
    correctly implement "limits", things just "don't work right"
    and you can try again. And, you likely already have all of
    the "special tools" to do so, at no added cost.

    I have an exercise for students to program a robot to
    traverse a maze. We only have *one* real robot (a 400 pound
    affair that needs to be transported in a van!). So, getting
    time on THE robot is hard to come by.

    OTOH, I can design a simulator/arena and create (or, let the
    students create!) mazes that they can "navigate" without
    the need for that big mechanism. They can explore hundreds
    of different approaches to maze solving (because solving also
    has a cost associated!) in a day; whereas the physical robot
    would require minutes to physically navigate ONE maze.

    They can share their implementations to see how a particular
    implementation fares in a particular maze (that they may not
    have imagined in their development)

    However, seeing their algorithm control a REAL mechanism is
    incredibly exciting! And, watching them wonder how their
    classmates' algorithms will perform, given that they only
    see the resulting actions, not the code behind them!

    [We're working on another "robot battle" application that
    will allow head-to-head competition, of sorts. Kids like
    seeing devices *act*, not just blink lights or scribble on
    a screen]

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  • From Don Y@21:1/5 to Martin Brown on Wed Jul 3 06:16:54 2024
    On 7/3/2024 5:46 AM, Martin Brown wrote:
    Yes but far too late to be much use. Since Brexit there is even less teaching of modern languages. English people have now become as lazy as Americans and so
    expect everyone to speak English. My 1970's state secondary school had a language lab with tape recorders and headsets for everybody and taught French,
    German, Spanish, Greek & Latin.

    In the US, there is little need for a "second language" (beyond first or second generation citizens) as our land area is roughly equivalent to ALL of europe (though population is only about half).

    Many in the US never really "leave" the state in which they were born. By contrast, *you* might drive to France for *lunch*!

    "Middle" school (12+13 year olds) introduces (introduced?) languages to students. Typically French, Spanish and Latin. This typically continues through high school (another 4 years). But, it is always considered an optional set of courses. Typically only taken by "college bound" students.
    I was 30 before I ever met a francophile.

    Living here (a suburb of MX), I wish I had taken spanish, instead, as it
    would have more utility. (though anyone that I am likely to converse with
    will know english -- even my iranian and japanese neighbors!).

    Everybody did French at first. Those that had done it at primary school had a massive head start which we never regained. If you were any good at it you could choose Latin or Greek. I chose Latin. I found I was much better at ancient languages that didn't require speaking them!

    Here, the problem with foreign languages is that you never have a *use* for them (possibly excepting spanish). Most folks had two or three non-english languages spoken in their homes -- but, that's a generational thing and kids often didn't see any value to picking up those as "secondary" languages.

    I've also noticed that you tend to treat a second language differently
    than your "native" tongue. E.g., most of the time I think in english.
    Yet, occasionally surprise myself when something comes out in another
    language (greek, italian, polish, french, etc.). There is a noticeable slipping of the gears as my head tries to figure out what I wanted to say... and then why it came out the way it did!

    Most educated Dutch or Swiss people I have encountered are fluent in at least three languages. I had one intern from U Twente who was brilliant.

    If you travel, much, in the US, you quickly realize there are different dialects and vocabularies that can seem to be akin to foreign languages
    to one that is not experienced in them. E.g., talking to a Mainer is... "interesting". And, I am always taken aback when I hear someone say
    "maysh" (mash). Or, talk about a "ball bat" (what is it, a ball? or a
    bat?)

    Place names are also highly localized in pronunciation. Worcester (WOOS-tuh), Billerica (bill-RICK-uh), Berlin (BURR-lin), New Haven (new HAY-ven), Boston (BAH-ston), Nevada (na-VA-da), etc. I've encountered people thousands of miles from their homes and have been able to approach them and confront them with their origins, based on their speaking mannerisms.

    [When I was in Britain, this also seemed to be the case. I was amused by
    how many different "accents" would be present in a group of people who worked/lived together!]

    National media personalities tend to be cultivated for a midwestern
    accent and speaking mannerisms.

    I learned some Russian at university too (for reading scientific papers) and then later Japanese by immersion in Japan. In Belgium my Flemish was just about
    good enough to get by - my wife's was better.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From john larkin @21:1/5 to All on Wed Jul 3 08:49:17 2024
    On Wed, 03 Jul 2024 12:20:30 GMT, Jan Panteltje <alien@comet.invalid>
    wrote:

    On a sunny day (Wed, 3 Jul 2024 10:30:39 +0100) it happened Martin Brown ><'''newspam'''@nonad.co.uk> wrote in <v635o1$24goj$1@dont-email.me>:

    On 02/07/2024 17:28, john larkin wrote:

    It's my opinion that there are few hobbyists that really work with
    parts and make circuits, and most EE grads are EE/CE dual majors that
    code more than they solder, and don't have instincts for electricity.

    There are still a few, but it has become a very minority interest today. >>Partly because everything is so heavily integrated and surface mount.

    When I grew up you could get dead ICL 1900 boards full of TTL chips for
    and bags dross coated transistors at start of line for pennies. Today
    there is no equivalent source of cheap easily reused parts.

    Back then there were also electronic kits for build your own computer etc.

    A lot of it today is plugging new mass produced modules together.
    Raspberry Pi has done a lot for that and to encourage electronics
    hobbyists though so it isn't all bad news.

    Here's a youtube on the subject:

    https://www.youtube.com/watch?v=CLnolhyT5SI

    Some of these guys blame surface mount, which seems wrong to me. There
    are lots of thru-hole parts and parts kits around.

    Surface mount has rendered modern kit all but impossible for the home
    user to repair.

    No, its even easier than say resistors with wires through holes
    While back I replaced a surface mount resistor in a digital mulimeter.
    It had evaporated.
    The difficult part was guessing the value from the other surface mount resistors around it.
    SMDs are easy to unsolder and remove and replace.


    I cut my teeth mending transistor car radios back when
    chassis earth was chosen randomly by each car manufacturer to be either >>positive or negative and people blew up their brand new car radios.

    The other big earner was mending teenage wannabe rock stars amplifiers
    that had their output transistors fried or a pint of beer in them.

    In those early sixties I designed and build a tube amplifier for the high school band,
    years later I got a call from the guitarist who really liked the sound
    if I could make some special effects stuff...
    I grew up with tubes and 78 rpm records ..



    I'd like to hire a few kids who love component-level electronics, but
    they are hard to find.

    Go looking at maker-spaces or whatever they are called in the US. Most
    of them will be trying to make electric guitars but they will be showing
    at least some skills with small pickup coils and low noise amplifiers.

    Back in my day a lot of our physics practicals were essentially
    electronics based - characteristics of a FET, various oscillators and a >>substantial digital electronics and logic course with a finishing test
    of making a digital dice (it may still be the same course even now).

    I'm pretty sure the previous generation did the same experiments on >>thermionic valves and relays but that was discontinued on H&S grounds.

    Teachers, in electronics school we had an old teacher teaching us about transistors
    and a student asked:
    'Sir, what exactly is a complementary pair?'
    Teacher got mad, thought it waa a sex joke, and asked the guy to leave the class.
    Took all of us to convince the teacher that that was a valid question.

    So, there but for what you learned yourself go you and I..

    But I am a bit diffferent, knew more about radio at 5 years old than some profies.
    Much I learend fron E Aisberg's books... Dutch for 'That is how the radio works':
    http://waij.com/oldbooks/radio_bestanden/Zoo_werkt_de_radio.pdf
    Mother got it for me from the library, was too young to get it myself.
    Later he also wrote 'That is how TV works', and 'That is how the transistor works'
    French:
    https://fr.wikipedia.org/wiki/Eug%C3%A8ne_Aisberg

    I don't know if there ever was an English translation, but THAT is good stuff to teach kids...
    I just downloaded the Dutch pdf, good memories! Still all valid!
    He starts with electrons and protons, atoms, the book had an 'ask all' and a 'know all' person
    in conversation about it all...
    Asking the right questions and getting the right answeres is a great way to quickly learn.

    I started learning French here ik kindergarten in the late forties..
    Do English ever learn French? German?

    Yikes, blast from the past.

    https://www.thegearpage.net/board/index.php?threads/ryder-amps-cabs-from-the60s.663614/

    I designed the signal path of the Ryder amps, including the "bell
    tone" circuit, sort of an amplitude-adaptive harmonic adder.

    The amp was named for Frank Ryder, mostly because someone liked the
    name.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Jan Panteltje@21:1/5 to '''newspam'''@nonad.co.uk on Thu Jul 4 05:50:03 2024
    On a sunny day (Wed, 3 Jul 2024 13:46:18 +0100) it happened Martin Brown <'''newspam'''@nonad.co.uk> wrote in <v63h6r$26bjr$1@dont-email.me>:

    On 03/07/2024 13:20, Jan Panteltje wrote:

    I started learning French here ik kindergarten in the late forties..
    Do English ever learn French? German?

    Yes but far too late to be much use. Since Brexit there is even less
    teaching of modern languages. English people have now become as lazy as >Americans and so expect everyone to speak English. My 1970's state
    secondary school had a language lab with tape recorders and headsets for >everybody and taught French, German, Spanish, Greek & Latin.

    Everybody did French at first. Those that had done it at primary school
    had a massive head start which we never regained. If you were any good
    at it you could choose Latin or Greek. I chose Latin. I found I was much >better at ancient languages that didn't require speaking them!

    Most educated Dutch or Swiss people I have encountered are fluent in at
    least three languages. I had one intern from U Twente who was brilliant.

    Yes, highschool here required Dutch, French, German, English, some also Latin. Later I did some Spanish and started on Chinese, never finised Spanish and Chinese
    would need to be there a while to get the feel of it.
    Had no problem in Spain though:-)


    I learned some Russian at university too (for reading scientific papers)
    and then later Japanese by immersion in Japan. In Belgium my Flemish was
    just about good enough to get by - my wife's was better.

    My Russian is very limited ..

    Watching satellite TV programs is a good way to learn the languages.
    Now they block Russian satellite TV (in English) here, only the US viewpoints allowed.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Joe Gwinn@21:1/5 to All on Thu Jul 4 10:19:13 2024
    On Thu, 04 Jul 2024 05:50:03 GMT, Jan Panteltje <alien@comet.invalid>
    wrote:

    On a sunny day (Wed, 3 Jul 2024 13:46:18 +0100) it happened Martin Brown ><'''newspam'''@nonad.co.uk> wrote in <v63h6r$26bjr$1@dont-email.me>:

    On 03/07/2024 13:20, Jan Panteltje wrote:

    I started learning French here ik kindergarten in the late forties..
    Do English ever learn French? German?

    Yes but far too late to be much use. Since Brexit there is even less >>teaching of modern languages. English people have now become as lazy as >>Americans and so expect everyone to speak English. My 1970's state >>secondary school had a language lab with tape recorders and headsets for >>everybody and taught French, German, Spanish, Greek & Latin.

    Everybody did French at first. Those that had done it at primary school
    had a massive head start which we never regained. If you were any good
    at it you could choose Latin or Greek. I chose Latin. I found I was much >>better at ancient languages that didn't require speaking them!

    Most educated Dutch or Swiss people I have encountered are fluent in at >>least three languages. I had one intern from U Twente who was brilliant.

    Yes, highschool here required Dutch, French, German, English, some also Latin. >Later I did some Spanish and started on Chinese, never finised Spanish and Chinese
    would need to be there a while to get the feel of it.
    Had no problem in Spain though:-)


    I learned some Russian at university too (for reading scientific papers) >>and then later Japanese by immersion in Japan. In Belgium my Flemish was >>just about good enough to get by - my wife's was better.

    My Russian is very limited ..

    Watching satellite TV programs is a good way to learn the languages.
    Now they block Russian satellite TV (in English) here, only the US viewpoints allowed.

    It is not blocked in the US. If you use a VPN to tunnel into the US,
    you will be able to get it over the internet.

    Wonder why the EU thinks that blocking such as RT will have much
    effect.

    Joe Gwinn

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Jan Panteltje@21:1/5 to joegwinn@comcast.net on Thu Jul 4 14:58:23 2024
    XPost: us.politics

    On a sunny day (Thu, 04 Jul 2024 10:19:13 -0400) it happened Joe Gwinn <joegwinn@comcast.net> wrote in <5mbd8jpek4e0h2p1sdrhufsrlfmsphni4b@4ax.com>:

    On Thu, 04 Jul 2024 05:50:03 GMT, Jan Panteltje <alien@comet.invalid>
    wrote:

    On a sunny day (Wed, 3 Jul 2024 13:46:18 +0100) it happened Martin Brown >><'''newspam'''@nonad.co.uk> wrote in <v63h6r$26bjr$1@dont-email.me>:

    On 03/07/2024 13:20, Jan Panteltje wrote:

    I started learning French here ik kindergarten in the late forties..
    Do English ever learn French? German?

    Yes but far too late to be much use. Since Brexit there is even less >>>teaching of modern languages. English people have now become as lazy as >>>Americans and so expect everyone to speak English. My 1970's state >>>secondary school had a language lab with tape recorders and headsets for >>>everybody and taught French, German, Spanish, Greek & Latin.

    Everybody did French at first. Those that had done it at primary school >>>had a massive head start which we never regained. If you were any good
    at it you could choose Latin or Greek. I chose Latin. I found I was much >>>better at ancient languages that didn't require speaking them!

    Most educated Dutch or Swiss people I have encountered are fluent in at >>>least three languages. I had one intern from U Twente who was brilliant.

    Yes, highschool here required Dutch, French, German, English, some also Latin.
    Later I did some Spanish and started on Chinese, never finised Spanish and Chinese
    would need to be there a while to get the feel of it.
    Had no problem in Spain though:-)


    I learned some Russian at university too (for reading scientific papers) >>>and then later Japanese by immersion in Japan. In Belgium my Flemish was >>>just about good enough to get by - my wife's was better.

    My Russian is very limited ..

    Watching satellite TV programs is a good way to learn the languages.
    Now they block Russian satellite TV (in English) here, only the US viewpoints allowed.

    It is not blocked in the US. If you use a VPN to tunnel into the US,
    you will be able to get it over the internet.

    Wonder why the EU thinks that blocking such as RT will have much
    effect.

    It is all about US war mongering
    The whole stuff started with byethen, who is a pawn in the claws of the US Military Industrial Complex,
    going to Putin, probably asking him what was NOT acceptable to Russia in YouCrane.
    Then Putin helped the Russia oriented (they had actually voted to be part of Russia as they always were).

    Remember how exactly byethen knew when Russia was going for military action in YouiCrane?
    The CIA controlled clown shitlensky is one of the best weapon sales agents the US
    Military Industrial Complex ever had.
    'Divide and rule', as done by the CIA all over the world, to create a market for that Military Industrial Complex is as old as the world.
    After leaving Afghanistan (after years of killing people there, and losing,
    as they did in Iraq, as they did in Vietnam, so many other places,
    Just like that other demonrat Bil Clignon made war in Europe.
    What can I say? And the people follow...
    Now the new NATO HEAD (and NATO is just a US sales agency for weapons) Rutte who was just voted away here by the right, will make things worse I suppose.
    he is just an other capitalist CIA puppet.
    US blowing up the Northstream pipeline to sell their own gas..
    Forbidding Netherlands to export chip tech to China, we need to get rid of NATO (a bunch of Commie paranoia idiots)
    and kick out the US everywhere.
    Align with Russia and China and make a sane world order.
    Perhaps the only way to do that is to nuke US into oblivion,
    or maybe it will self-destruct because of stupidity,
    One look at the current leaders does make that likely,
    only an idiot would vote for any of them.
    One senile, one a convicted lying criminal, his lawyer a criminal ..

    Capitalism gone totally wrong.
    US hates its own people, tents all over the cities with homeless, drug addicts now a new law that allows cities to remove those tents..
    Then where do you go? No mony, no housing, no food,
    grab one of these fat law enforcement guys and have a barbecue party.
    US is going towards cannibalism.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Don Y@21:1/5 to BillGill on Thu Jul 4 08:05:52 2024
    On 7/4/2024 6:24 AM, BillGill wrote:
    On 7/3/2024 8:57 AM, Don Y wrote:
    Do you have a pointer to that information (looking for tips that
    I may not have discovered as I've been digitizing my dead trees)?

    Sorry about that last post.  I have been having trouble
    with my email and everything has been messed up.

    Have you found https://diybookscanner.org/?

    No -- but, thanks, I will have a look.

    On their Forum
    there are probably posted thousands of things about all
    aspects of book scanning.  If you search there you can get
    answers to almost any question you might have.

    A quick glance seems to suggest they do "non-destructive"
    scanning. I've opted to treat most (95%?) of my titles
    as "disposable" -- cut off the binding, feed pages through
    scanner, bundle resulting TIFFs in a PDF container, recycle
    scanned paper. Lather, rinse, repeat.

    It seems like trying to preserve the book would greatly
    complicate the effort (?) and time required (??). And, if
    the goal is to be rid of the paper, then I don't see the
    real advantage of trying to keep the book intact...

    What do you do with YOUR books after scanning them?
    Are you scanning with the goal of creating searchable
    documents? Or, of getting rid of "paper"?

    How many titles are you handling? Do YOU own them?

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Jan Panteltje@21:1/5 to kraken.sankey@gmail.com on Fri Jul 5 05:12:48 2024
    On a sunny day (Thu, 4 Jul 2024 22:39:49 +0100) it happened TTman <kraken.sankey@gmail.com> wrote in <v674rb$2u2e7$1@dont-email.me>:

    On 02/07/2024 18:03, DJ Delorie wrote:
    john larkin <jlarkin_highland_tech> writes:
    It's my opinion that there are few hobbyists that really work with
    parts and make circuits, and most EE grads are EE/CE dual majors that
    code more than they solder, and don't have instincts for electricity.

    IMHO the term "hobby electronics" used to mean "soldering up radios" but
    now means "jumper wiring modules". Arduino, RPi, and ESP32 have made it
    trivial for anyone to wire up sensors and actuators.

    Where used to be a niche talent (designing transistors or ICs) has moved
    up the tree (designing modules) with the corresponding dearth of
    interested applicants.

    One can only hope that easy access to PCB manufacturing and assembly
    services will make the niche talents more popular.

    I used to solder/build up valve amplifiers that went into record players
    back in the 60's as a school kid...300V bites :)

    Yes, I once got stuck with my hand in a tube radio and it burned a scar in my left hand
    when I accidently touched a 300V transformer connection.. could not let go, asked the guy next to me 'pull the power plug'.
    Later I better learned to control myself when hanging on the power...
    25 kV color TV sparks were interesting too.
    peeseebees? I used to etch my own, still have some etching stuff,
    some drawn with a pen, later with printer and photo sensitive PCB ..

    At work I had them made by a local company here...

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Jan Panteltje@21:1/5 to tonisdad215@gmail.com on Fri Jul 5 15:14:01 2024
    On a sunny day (Fri, 5 Jul 2024 08:46:26 -0500) it happened BillGill <tonisdad215@gmail.com> wrote in <v68tfj$3abt3$1@dont-email.me>:

    I have a large paper library. I am also getting old.
    I may have to go into some sort of assisted living
    when I can't go on living by myself. When I do I will
    not be able to take my library with me. So I have
    been building a digital library. Most books that I have
    are available in digital format. But I realized that many
    of the older books are not available. They are mainly fiction,
    mysteries, SF, even a few romances. And mostly from
    the time when books were mostly a one time event. A
    few old time authors, such as Agatha Christie, are still
    in print and available as print or digital, but many
    are not. So I decided to digitize those books for myself.
    While most of them are in copyright, I have no idea how
    to get permission. I suspect that is why many of them are
    not in digital format. So I have been digitizing them for
    my own use. I will not distribute them in any way. They
    are strictly for my own use. If any of them show up in
    digital format I will buy that edition.

    So I have been doing non-destructive scanning. This is a
    rather long process, since I am creating epub formatted books
    epub is a format based on HTML so that it can be automatically
    reformatted to fit on any screen. But that means extra
    work. It takes anyplace for 3 days to a week, depending on
    the size and quality of the book. First I scan it using
    my DIY scanner. This involves taking a photo of each page,
    then converting the photos to text, using Optical Character
    Recognition (OCR) software. After that is the slow part.
    I insert the text into a word processor and proof it to
    correct all the many errors the OCR makes in the process.
    How many errors depends partly on the quality of the source.
    Then it is fairly simple to convert it to the epub format,
    or into the AZW3 format that can be read by kindle.

    Bill

    I just take pictures of the pages, and then make a pfd that holds the pictures. Works fast with my canon camera on a tripod.
    Takes care of any pictures in the book too.

    convert "*.JPG" -quality 100 outfile.pdf
    convert' is part of ImageMagic, to allow pdf output:
    In /etc/ImageMagick-6/policy.xml
    change 'none' to 'read|write" to enable pdf output:
    <policy domain="coder" rights="read|write" pattern="PDF" />

    There are many readers for pdf format, you can select size too.
    I use xpdf in Linux, pdf in firefox browser works too, ctrl + and ctrl- to enlarge or make it smaller.
    Especially nice is using it for the microscopic small (one inch or so) 'manuals' like for my watch or other electronic stuff.
    All goes to a 4 TB harddisk these days.
    Linux 'locate' will find it in a second.

    Few month ago did make a pdf from about 500 pages of A4 size circuit diagrams I wrote in the past that way.
    All on a Raspberry Pi4 8GB..
    Same one I am posting this from.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Don Y@21:1/5 to BillGill on Fri Jul 5 09:51:26 2024
    On 7/5/2024 6:46 AM, BillGill wrote:
    I have a large paper library.  I am also getting old.

    Ditto -- on both counts. When I moved here, I had *80*
    "xerox paper" cartons (the sort that hold ten 500 sheet reams)
    full of just paperback novels. The older paperbacks were tiny
    things -- maybe 250pp. So, I would read several each week.
    (Having bought the title, it was silly not to KEEP it)

    I may have to go into some sort of assisted living
    when I can't go on living by myself.  When I do I will
    not be able to take my library with me.  So I have

    In my case, I simply didn't have the room for all that paper.
    Yet, wanted to retain access to the *content* as I am often
    looking for some story that I'd read "some time ago" and one
    easy way to find it is to look through MY titles (if I read
    it, I still *have* it!)

    been building a digital library.  Most books that I have
    are available in digital format.  But I realized that many
    of the older books are not available.  They are mainly fiction,
    mysteries, SF, even a few romances.  And mostly from
    the time when books were mostly a one time event.  A

    Agreed. Or, are oddball titles: _Mouthsounds_, _Ben & Jerry's
    Ice Cream & Dessert Book_, _Joyce Chen Cookbook_, _The Fabulous
    Furry Freak Brothers in 'The Idiots Abroad'_, _TeXniques_,
    _Optimal Strategy for Pai Gow Poker_, etc. Adopting the PDF
    container means I can preserve any illustrations in the texts,
    as well.

    I also scan paper documents ("research papers") that are no longer
    available on-line. And, a variety of different "manuals" (I had a
    few cubic feet of MULTICS manuals that now occupy zero space on my
    shelf! :> ) These tend to be larger page sizes so I need to
    view them on a larger screen than my eReaders -- I will eventually
    buy an oversized tablet to use for this (instead of my monitors).

    Thankfully, a lot of other "reference" titles were published
    in "Perfect" bindings. As with the paperbacks, it's easy to chop
    the binding edge off of the book (I have a paper cutter that will
    cut up to a 1" thick stack of paper, "straight" -- the "slicing"
    kind will leave you with different size pages!). Anything too
    thick for the cutter is manually cut (or "sliced" with a box cutter)
    along the *inside* of the binding to produce 1" thick chunks.

    Then, place the stack on the scanner and let it scan them,
    sequentially (both sides) to TIFFs and package those in PDFs.
    If all of the pages are similar size (true for most things
    except service manuals with larger fold-outs) *and* the
    same "type" (i.e., all B&W print instead of some "color
    inserts"), then they can be scanned pretty quickly. I think
    the main scanner that I use does 20 or 30 double-sided pages
    per minute.

    (If I have to scan an 11x17 "fold out", I have to do so on a manual,
    flatbed scanner -- which takes MINUTES by the time you set the ONE
    page in place)

    The "small" scanner claims I have scanned 94931 double-sided sheets
    (i.e., ~190K images)

    For the already small page size (of old paperbacks), my
    eReaders can display PDFs at full size -- or larger.

    few old time authors, such as Agatha Christie, are still
    in print and available as print or digital, but many
    are not.  So I decided to digitize those books for myself.
    While most of them are in copyright, I have no idea how
    to get permission.

    I think you can probably argue that they are for your own
    use and, having had the originals, there is no difference
    in having PHOTOGRAPHS of the original pages.

    I think *distributing* same would run the risk of some legal
    action. I save the front covers as "proof" of having owned
    the book (a stack of covers takes up relatively little space)

    I suspect that is why many of them are
    not in digital format.  So I have been digitizing them for
    my own use.  I will not distribute them in any way.  They
    are strictly for my own use.  If any of them show up in
    digital format I will buy that edition.

    I made a systematic effort to find "original" (PDF) copies of
    most of the research papers in my collection. That's where *my*
    paper copies originated -- I just failed to preserve the PDFs
    in favor of print copies, "back then".

    For each title found, I would discard my paper copy in favor of
    the digital version -- regardless of whether it was a low resolution
    scan, "true" PDF, etc. I did this mainly to get "cleaner" copies
    of the documents (not stained/dog-eared).

    So I have been doing non-destructive scanning.  This is a
    rather long process, since I am creating epub formatted books
    epub is a format based on HTML so that it can be automatically
    reformatted to fit on any screen.

    Yes, but this only works well with "pure text" documents
    (e.g., old "pocket" paperbacks). Anything with illustrations,
    tables, etc. tend to be poorly suited for epubs. As my goal
    is just to replace the paper, a "collection of TIFFs" achieves
    that goal *quickly*.

    [Depending on the material and the size of the typeface,
    I scan at 600 or 1200 dpi -- so I can postprocess the TIFFs
    with OCR /at a later date/, if I choose to do so]

    But that means extra
    work.  It takes anyplace for 3 days to a week, depending on
    the size and quality of the book.  First I scan it using
    my DIY scanner.  This involves taking a photo of each page,
    then converting the photos to text, using Optical Character
    Recognition (OCR) software.  After that is the slow part.

    Ah, I would consider capturing the images in this manner to
    be slow. You have to manually flip pages and reposition the
    book in the scanner -- ? It's got to take 10+ (20+??) seconds
    to perform that action? So, even a 250p "pocket paperback"
    would be > 1200 (2400??) seconds just to scan! And then "collect"?

    [I.e., 95K scans would have taken 950K seconds -- 16000 minutes
    (~250 hours)]

    I insert the text into a word processor and proof it to
    correct all the many errors the OCR makes in the process.

    The (my) scanner can do the OCR but it leaves you (me) with
    these problems you've outlined. If you forego the ability
    to do searches, then having a "photo" of the page and
    relying on your own brain for the OCR seems more expedient.

    How many errors depends partly on the quality of the source.
    Then it is fairly simple to convert it to the epub format,
    or into the AZW3 format that can be read by kindle.

    But, you still have those books lying around? Here, you
    could donate them to the local library -- but, they will
    simply be sold ($1/each) to raise funds for "other uses".
    Their content will only be available to a person who stumbles
    upon the title on the "for sale" rack. (I'd rather just
    donate monies and discard the "paper")

    Good luck with your effort! I can recall digitizing 35mm
    slides -- a similarly slow process. Thankfully, I didn't
    have more than a few hundred to process...

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Don Y@21:1/5 to Don Y on Fri Jul 5 10:40:09 2024
    On 7/5/2024 9:51 AM, Don Y wrote:
    The "small" scanner claims I have scanned 94931 double-sided sheets
    (i.e., ~190K images)

    Apparently, that "94931" is the total number of scans /on this set of
    rollers/. You replace the rollers every 200,000 sheets (and I've
    replaced them a few times, already) so the actual number of scanned
    pages is some multiple of 200K *plus* 95K.

    <frown>

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Don Y@21:1/5 to BillGill on Sat Jul 6 10:28:33 2024
    On 7/6/2024 6:22 AM, BillGill wrote:
    On 7/5/2024 11:51 AM, Don Y wrote:
    Ah, I would consider capturing the images in this manner to
    be slow.  You have to manually flip pages and reposition the
    book in the scanner -- ?  It's got to take 10+ (20+??) seconds
    to perform that action?  So, even a 250p "pocket paperback"
    would be > 1200 (2400??) seconds just to scan!  And then "collect"?

    [I.e., 95K scans would have taken 950K seconds -- 16000 minutes
    (~250 hours)]

    Generally photographing the pages takes me 30 minutes to
    an hour.  I mostly scanned books of 250 to 300 pages.

    So, that would be about 10 seconds per "page turn"

    I "process" (start to finish) about 1000 pp/hour. I tend to
    think in terms of pages and not titles; e.g., I will "chop"
    some number of titles to get a stack of about 1000 pp before
    heading over to place them in the scanner. Then, access the
    files (the scanner places them in a network share) to sort
    out which groups of pages are in which files (so I know which
    files to combine into a particular book).

    Then, grab another similarly sized pile of books and repeat.
    (when in "scanning mode", I tend to do about 5000-6000 pages
    before the boredom/tedium becomes overwhelming)

    And most of the books, being older, were somewhat smaller.
    There weren't a whole lot of 1000 page fiction works
    in the 'good old days'.

    Yes -- definitely true of "pocket books". Do you have
    to take care in positioning the book to ensure it is in the
    cameras' focused field? I.e., the scanner approach automatically
    crops the image to the actual page size so you just load pages
    and wait -- to load MORE pages.

    I think that the increase in the size of books can
    probably be blamed on word processors.  With a
    word processor you can revise, insert and delete
    text a lot more easily than with a typewriter.

    Yes. I attributed it to authors/publishers wanting to
    charge more than 60c for a title. And, with the mainstream
    acceptance of computers, it seemed like all of the books/manuals
    about them were sold by the pound -- despite only regurgitating
    material that was present in the OEM documentation.

    OTOH, manuals for software quickly became thick tomes. My first
    AutoCAD manual was a hardbound, oversized book. And, manuals for
    productivity suites, compilers, etc. were easily 1/4 of a shelf's
    width.

    Of course, textbooks have always been on the heavy side.
    I think my thinnest titles were for Probabilistic Systems Analysis
    and perhaps Abstract Algebra (or, maybe diff-eqs?).

    And, databooks/application notes fill shelves really quickly!

    --- SoupGate-Win32 v1.05
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  • From John Robertson@21:1/5 to john larkin on Sat Jul 6 15:00:53 2024
    On 2024/07/02 9:28 a.m., john larkin wrote:

    It's my opinion that there are few hobbyists that really work with
    parts and make circuits, and most EE grads are EE/CE dual majors that
    code more than they solder, and don't have instincts for electricity.

    Here's a youtube on the subject:

    https://www.youtube.com/watch?v=CLnolhyT5SI

    Some of these guys blame surface mount, which seems wrong to me. There
    are lots of thru-hole parts and parts kits around.

    I'd like to hire a few kids who love component-level electronics, but
    they are hard to find.


    I often hire kids from local high schools that are in the robotics
    programs. This usually works out well for both of us...

    John :-#)#
    --
    (Please post followups or tech inquiries to the USENET newsgroup)
    John's Jukes Ltd.
    #7 - 3979 Marine Way, Burnaby, BC, Canada V5J 5E3
    (604)872-5757 (Pinballs, Jukes, Video Games)
    www.flippers.com
    "Old pinballers never die, they just flip out."

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Edward Rawde@21:1/5 to Martin Brown on Sat Jul 6 19:01:30 2024
    "Martin Brown" <'''newspam'''@nonad.co.uk> wrote in message news:v635o1$24goj$1@dont-email.me...
    On 02/07/2024 17:28, john larkin wrote:

    It's my opinion that there are few hobbyists that really work with
    parts and make circuits, and most EE grads are EE/CE dual majors that
    code more than they solder, and don't have instincts for electricity.

    There are still a few, but it has become a very minority interest today. Partly because everything is so heavily integrated and
    surface mount.

    When I grew up you could get dead ICL 1900 boards full of TTL chips for and bags dross coated transistors at start of line for
    pennies. Today there is no equivalent source of cheap easily reused parts.

    Back then there were also electronic kits for build your own computer etc.

    A lot of it today is plugging new mass produced modules together. Raspberry Pi has done a lot for that and to encourage
    electronics hobbyists though so it isn't all bad news.

    Here's a youtube on the subject:

    https://www.youtube.com/watch?v=CLnolhyT5SI

    Some of these guys blame surface mount, which seems wrong to me. There
    are lots of thru-hole parts and parts kits around.

    Surface mount has rendered modern kit all but impossible for the home user to repair. I cut my teeth mending transistor car radios
    back when chassis earth was chosen randomly by each car manufacturer to be either positive or negative and people blew up their
    brand new car radios.

    The other big earner was mending teenage wannabe rock stars amplifiers that had their output transistors fried or a pint of beer
    in them.

    Anyone remember SN76013N/023N.
    Horrible things, particularly when it must be your fault that the replacements (two for stereo) blew up again a few days after
    repair.


    I'd like to hire a few kids who love component-level electronics, but
    they are hard to find.

    Go looking at maker-spaces or whatever they are called in the US. Most of them will be trying to make electric guitars but they
    will be showing at least some skills with small pickup coils and low noise amplifiers.

    Back in my day a lot of our physics practicals were essentially electronics based - characteristics of a FET, various oscillators
    and a substantial digital electronics and logic course with a finishing test of making a digital dice (it may still be the same
    course even now).

    I'm pretty sure the previous generation did the same experiments on thermionic valves and relays but that was discontinued on H&S
    grounds.

    --
    Martin Brown


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  • From Martin Brown@21:1/5 to Edward Rawde on Sun Jul 7 16:57:41 2024
    On 07/07/2024 00:01, Edward Rawde wrote:
    "Martin Brown" <'''newspam'''@nonad.co.uk> wrote in message news:v635o1$24goj$1@dont-email.me...
    On 02/07/2024 17:28, john larkin wrote:


    Some of these guys blame surface mount, which seems wrong to me. There
    are lots of thru-hole parts and parts kits around.

    Surface mount has rendered modern kit all but impossible for the home user to repair. I cut my teeth mending transistor car radios
    back when chassis earth was chosen randomly by each car manufacturer to be either positive or negative and people blew up their
    brand new car radios.

    The other big earner was mending teenage wannabe rock stars amplifiers that had their output transistors fried or a pint of beer
    in them.

    Anyone remember SN76013N/023N.
    Horrible things, particularly when it must be your fault that the replacements (two for stereo) blew up again a few days after
    repair.

    ISTR a remarkable number of 741s or 709s inside them and the odd SE540
    in the better ones. 2955/3055 output pairs - before power FETs took over.

    --
    Martin Brown

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  • From Don Y@21:1/5 to BillGill on Sun Jul 7 08:46:53 2024
    On 7/7/2024 6:41 AM, BillGill wrote:
    On 7/6/2024 12:28 PM, Don Y wrote:
    Yes -- definitely true of "pocket books".  Do you have
    to take care in positioning the book to ensure it is in the
    cameras' focused field?  I.e., the scanner approach automatically
    crops the image to the actual page size so you just load pages
    and wait -- to load MORE pages.

    I am using my own KISS (Keep It Simple Stupid) scanner, which
    I designed myself.  I originally called it a Tower Scanner, but
    changed the name when I realized that I had made it as simple
    as possible.

    I posted a description of it on DIY Book Scanner, at: https://diybookscanner.org/forum/viewtopic.php?p=22274&hilit=tower+scanner#p22274

    As you can see I have a mirror in the base of the scanner
    that I used to verify that the page is correctly placed.  It
    doesn't zoom in to fit the page, it just overscans.

    If the USB i/f worked, you wouldn't need the mirror (?)

    Your approach seems more like the Reading Machine used
    (in "paper handling") -- though it used a moving camera-illuminator
    to scan the actual page (which meant the book had to remain in place for
    a considerable length of time): <https://life.ieee.org/wp-content/uploads/Harvey-Lauer-with-Kurzweil-Reading-Machine-1200x819.png>

    I don't do much manipulation of the images before I OCR them.
    I use Abby Finereader 14 which does a pretty good job of
    picking out the text.  I stick with 14 because it works good
    and newer versions are only available as subscriptions.

    All OCR tools "have problems". My scanner will do OCR but then I
    lose the original images (so how do I sort out what the OCR *should* have
    been once the original is gone?). I've also had some luck with
    Omnipage.

    Understand that I am making ebooks that I can carry around on
    different devises, not PDFs that can also be viewed on different
    devices, but don't necessarily have all the text correct.

    The PDF doesn't have to get the text correct; it can store the
    image of the page (and let your eyes/brain do the OCR).

    I can store the OCRed text "behind" the image so that you can select
    the text with your cursor (in a PC application). But, again, you
    are stuck relying on the quality of the OCR algorithm.

    And I don't digitize technical books.  They are a whole different proposition, with lots of finicky illustrations.  Not something
    that I would like to try to digitize.

    As my goal is to be rid of dead trees, I have no choice in the
    matter. Even discarding (scanning) all of my "paperbacks" leaves me
    with a few hundred cubic feet of paper.

    Also I don't want to destroy my paper books.  I like reading
    books on paper. After all that is how I grew up.

    Agreed. But, if you are proactively safeguarding your collection against
    the possibility of downsizing into a different living situation, you've
    already decided that they will be discarded -- even if not "destroyed".

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Edward Rawde@21:1/5 to Martin Brown on Sun Jul 7 13:43:56 2024
    "Martin Brown" <'''newspam'''@nonad.co.uk> wrote in message news:v6edtl$cvkh$1@dont-email.me...
    On 07/07/2024 00:01, Edward Rawde wrote:
    "Martin Brown" <'''newspam'''@nonad.co.uk> wrote in message news:v635o1$24goj$1@dont-email.me...
    On 02/07/2024 17:28, john larkin wrote:


    Some of these guys blame surface mount, which seems wrong to me. There >>>> are lots of thru-hole parts and parts kits around.

    Surface mount has rendered modern kit all but impossible for the home user to repair. I cut my teeth mending transistor car
    radios
    back when chassis earth was chosen randomly by each car manufacturer to be either positive or negative and people blew up their
    brand new car radios.

    The other big earner was mending teenage wannabe rock stars amplifiers that had their output transistors fried or a pint of beer
    in them.

    Anyone remember SN76013N/023N.
    Horrible things, particularly when it must be your fault that the replacements (two for stereo) blew up again a few days after
    repair.

    ISTR a remarkable number of 741s or 709s inside them and the odd SE540 in the better ones. 2955/3055 output pairs - before power
    FETs took over.

    STK devices were fairly common too. https://www.youtube.com/watch?app=desktop&v=ghyZZSC0Qbw
    About 15 years ago a friend asked me to look at a tuner/amplifier which had these in the audio output.
    Someone else had cracked the plastic cover off and replaced the short circuit output transistors by wiring to an external pair.
    TIP41/42 maybe but I forget exactly. It was working but there was crossover distortion.
    Whoever did the repair likely didn't have the Internet.
    With the Internet I was able to obtain a replacement device which worked fine and probably wasn't fake.
    I wonder if the fakes shown in that video actually work.

    When I worked as a designer I came across fake parts a few times.
    One reel if devices was SO8 and the devices were marked with the correct number but the manufacturer didn't make that part in SO8.
    So it wasn't hard to spot the fake.
    Another reel of devices did have the correct part number on the correct package but it was anybody's guess what chip was actually in
    the package.


    --
    Martin Brown


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  • From Don Y@21:1/5 to Edward Rawde on Sun Jul 7 11:32:40 2024
    On 7/7/2024 10:43 AM, Edward Rawde wrote:
    When I worked as a designer I came across fake parts a few times. One reel
    if devices was SO8 and the devices were marked with the correct number but the manufacturer didn't make that part in SO8. So it wasn't hard to spot the fake. Another reel of devices did have the correct part number on the
    correct package but it was anybody's guess what chip was actually in the package.

    I had a client contact me about a problem he was having with some
    other design (not one of mine). Begrudgingly, I offered to help
    (I don't like having to troubleshoot other designs as you never
    know the quality of the design/designer).

    It quickly became apparent that one device was bad in every sample.
    On closer inspection, there was no die *in* the package!

    ["Talk to your purchasing guy about where he 'found' these. And, make
    sure he never 'finds' anything else, there!"]

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Martin Brown@21:1/5 to Don Y on Sun Jul 7 20:55:30 2024
    On 07/07/2024 19:32, Don Y wrote:
    On 7/7/2024 10:43 AM, Edward Rawde wrote:
    When I worked as a designer I came across fake parts a few times. One
    reel
    if devices was SO8 and the devices were marked with the correct number
    but
    the manufacturer didn't make that part in SO8. So it wasn't hard to
    spot the
    fake. Another reel of devices did have the correct part number on the
    correct package but it was anybody's guess what chip was actually in the
    package.

    I had a client contact me about a problem he was having with some
    other design (not one of mine).  Begrudgingly, I offered to help
    (I don't like having to troubleshoot other designs as you never
    know the quality of the design/designer).

    It quickly became apparent that one device was bad in every sample.
    On closer inspection, there was no die *in* the package!

    We once had a flashover event with a very expensive prototype 22bit ADC
    back in the late 80's where it vapourised the bond out leads. The chip
    was working really well right up to that point and we had a 6 sig fig
    linear ADC (intention was to replace bulk buy Solartron 7060s).

    We decided honesty was the best course of action and the chip makers
    liasson guy admitted that if *they* hadn't tested it themselves before
    shipping it to us they could have believed that they forgot that step!

    They gave us another chip and the things went into full production not
    long after they were able to produce them in bulk. Solartron were a bit surprised when one their best customers vanished completely.

    --
    Martin Brown

    --- SoupGate-Win32 v1.05
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  • From Don Y@21:1/5 to Martin Brown on Sun Jul 7 16:56:40 2024
    On 7/7/2024 12:55 PM, Martin Brown wrote:
    On 07/07/2024 19:32, Don Y wrote:
    On 7/7/2024 10:43 AM, Edward Rawde wrote:
    When I worked as a designer I came across fake parts a few times. One reel >>> if devices was SO8 and the devices were marked with the correct number but >>> the manufacturer didn't make that part in SO8. So it wasn't hard to spot the
    fake. Another reel of devices did have the correct part number on the
    correct package but it was anybody's guess what chip was actually in the >>> package.

    I had a client contact me about a problem he was having with some
    other design (not one of mine).  Begrudgingly, I offered to help
    (I don't like having to troubleshoot other designs as you never
    know the quality of the design/designer).

    It quickly became apparent that one device was bad in every sample.
    On closer inspection, there was no die *in* the package!

    We once had a flashover event with a very expensive prototype 22bit ADC back in
    the late 80's where it vapourised the bond out leads. The chip was working really well right up to that point and we had a 6 sig fig linear ADC (intention
    was to replace bulk buy Solartron 7060s).

    I did that while debugging a CPU ("chip") built from ECL SSI/MSI DIPs.
    The system was "hot". I slipped and let one of the DIP's leads short
    the -5.2V power pin to the ground plane. The 100A power supply didn't
    even notice the change in load impedance -- when my eyes cleared from
    the flash, the lead was gone. Ooops.

    We decided honesty was the best course of action and the chip makers liasson guy admitted that if *they* hadn't tested it themselves before shipping it to us they could have believed that they forgot that step!

    They gave us another chip and the things went into full production not long after they were able to produce them in bulk. Solartron were a bit surprised when one their best customers vanished completely.

    I have always used integrating and self-calibrating approaches to get high precision results. Usually <something>-to-frequency where I can count the
    per unit time to get high precision or measure time per count for lower frequency results. In some designs, I've had to address uncalibrated tolerances of -50% to +300%.

    [As long as you don't have to report dimensioned units, you can get away
    with lots of "magic"]

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Jan Panteltje@21:1/5 to blockedofcourse@foo.invalid on Mon Jul 8 05:16:10 2024
    On a sunny day (Sun, 7 Jul 2024 08:46:53 -0700) it happened Don Y <blockedofcourse@foo.invalid> wrote in <v6ed9e$cpga$1@dont-email.me>:

    On 7/7/2024 6:41 AM, BillGill wrote:
    On 7/6/2024 12:28 PM, Don Y wrote:
    Yes -- definitely true of "pocket books".  Do you have
    to take care in positioning the book to ensure it is in the
    cameras' focused field?  I.e., the scanner approach automatically
    crops the image to the actual page size so you just load pages
    and wait -- to load MORE pages.

    I am using my own KISS (Keep It Simple Stupid) scanner, which
    I designed myself.  I originally called it a Tower Scanner, but
    changed the name when I realized that I had made it as simple
    as possible.

    I posted a description of it on DIY Book Scanner, at:
    https://diybookscanner.org/forum/viewtopic.php?p=22274&hilit=tower+scanner#p22274

    As you can see I have a mirror in the base of the scanner
    that I used to verify that the page is correctly placed.  It
    doesn't zoom in to fit the page, it just overscans.

    If the USB i/f worked, you wouldn't need the mirror (?)

    Your approach seems more like the Reading Machine used
    (in "paper handling") -- though it used a moving camera-illuminator
    to scan the actual page (which meant the book had to remain in place for
    a considerable length of time): ><https://life.ieee.org/wp-content/uploads/Harvey-Lauer-with-Kurzweil-Reading-Machine-1200x819.png>

    I don't do much manipulation of the images before I OCR them.
    I use Abby Finereader 14 which does a pretty good job of
    picking out the text.  I stick with 14 because it works good
    and newer versions are only available as subscriptions.

    All OCR tools "have problems". My scanner will do OCR but then I
    lose the original images (so how do I sort out what the OCR *should* have >been once the original is gone?). I've also had some luck with
    Omnipage.

    Understand that I am making ebooks that I can carry around on
    different devises, not PDFs that can also be viewed on different
    devices, but don't necessarily have all the text correct.

    The PDF doesn't have to get the text correct; it can store the
    image of the page (and let your eyes/brain do the OCR).

    I can store the OCRed text "behind" the image so that you can select
    the text with your cursor (in a PC application). But, again, you
    are stuck relying on the quality of the OCR algorithm.

    And I don't digitize technical books.  They are a whole different
    proposition, with lots of finicky illustrations.  Not something
    that I would like to try to digitize.

    As my goal is to be rid of dead trees, I have no choice in the
    matter. Even discarding (scanning) all of my "paperbacks" leaves me
    with a few hundred cubic feet of paper.

    Also I don't want to destroy my paper books.  I like reading
    books on paper. After all that is how I grew up.

    Agreed. But, if you are proactively safeguarding your collection against
    the possibility of downsizing into a different living situation, you've >already decided that they will be discarded -- even if not "destroyed".

    Was thinking about all this and maybe this works to make a fast backup of a book.
    Make a video
    Say you have a 1000 pages book.
    Put it open on the table, flat, so 2 pages are visible.
    Start your video recording that just gets the 2 pages...
    Chose a format with sufficient resolution so thing are readable on playback Start on page 1 and 2,
    Now flip pages by hand every 3 seconds.
    You need about 500 x 3 seconds makes 25 minutes for the whole book that way... Use a metronme or some beep from the PC as timer...
    Good video players can be set to play at any speed
    mplayer -fps 3 the_big_book.mp4
    Fast forward or backward to the page you want with the cursor keys.
    Have to try this out one day :-)

    Maye even work with your smartphone camera.
    A 25 minutes video takes very little space.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Don Y@21:1/5 to BillGill on Mon Jul 8 08:31:19 2024
    On 7/8/2024 6:45 AM, BillGill wrote:

    As you can see I have a mirror in the base of the scanner
    that I used to verify that the page is correctly placed.  It
    doesn't zoom in to fit the page, it just overscans.

    If the USB i/f worked, you wouldn't need the mirror (?)

    There is some software that works with some cameras that will
    send the images directly to the computer.

    But, would it show "viewfinder" images or just *snapped* images?
    I.e., could you use the images delivered "in real time" at
    the computer to PREVIEW the photos that will be snapped? Or,
    does it only transfer the images after they have been taken?
    (which would be more tedious to try to use to align the book)

    When I was KISSing
    the scanner I went with the simplest approach.  This way it
    will work with any camera, you just have to build it so that
    the camera is at the correct distance from the platen.

    Makes sense. And, as you are shooting THROUGH the glass,
    this distance is constant (whereas those builds that shot
    the "open book" have to accommodate the distance changing
    as the number of pages increases the "thickness" as they
    are sequentially "flipped"

    Your approach seems more like the Reading Machine used
    (in "paper handling") -- though it used a moving camera-illuminator
    to scan the actual page (which meant the book had to remain in place for
    a considerable length of time):
    <https://life.ieee.org/wp-content/uploads/Harvey-Lauer-with-Kurzweil-Reading-Machine-1200x819.png>

    Well, I see that the way the book is set on the scanner is
    similar, but of course my scanner takes the whole page at
    once.

    The point was that the approach makes it easier to access deeper
    into the gutter. I would imagine the builds that have the book face
    up, opened to a pair of pages have to contend with pages infringing
    on the gutter as the position *in* the book changes (and more paper
    piles up on one side or the other)

    The goal is, of course, different.  The reading machine
    is turning the printed text into sound, which is a whole
    different thing from turning it into text.

    Actually, The Reading Machine was one of the first commercial
    "omnifont" OCR machines. The scanner (a linear CCD) assembles
    the image of the characters and then the characters are
    recognized, fed to the text-to-speech system and converted
    to sound (by the speech synthesizer).

    An early attempt to commercialize the OCR capabilities was
    The Data Entry System. There, the text-to-speech module and
    speech synthesizer were elided from the system with the
    recognized text as the primary output. A graphic display
    allowed a *sighted* operator (The Reading Machine was targeted
    to the visually impaired) to verify and correct the OCR
    as the pages were being scanned.

    Note this is mid/late 70's so these sorts of capabilities
    didn't exist. How would you get a *digital* copy of a
    telephone book (name, address, phone)? Or, copies of
    published newspapers (AS they were being published)?

    I don't do much manipulation of the images before I OCR them.
    I use Abby Finereader 14 which does a pretty good job of
    picking out the text.  I stick with 14 because it works good
    and newer versions are only available as subscriptions.

    All OCR tools "have problems".  My scanner will do OCR but then I
    lose the original images (so how do I sort out what the OCR *should* have
    been once the original is gone?).  I've also had some luck with
    Omnipage.

    Since I have the original scans in the computer, rather than running
    them straight through the OCR and losing the originals that is not
    a problem.  And of course I still have the original books so that I
    can proof the text with confidence.

    Yes, but this means KEEPING extra "stuff" -- the original books,
    the original scans, AND the output of your process.

    My approach keeps the scans *as* the output -- so the books are
    redundant. And, being TIFFs, they are lossless so I can do
    (or RE-do) the OCR at any time -- including as I am reading them.

    Understand that I am making ebooks that I can carry around on
    different devises, not PDFs that can also be viewed on different
    devices, but don't necessarily have all the text correct.

    The PDF doesn't have to get the text correct; it can store the
    image of the page (and let your eyes/brain do the OCR).

    I can store the OCRed text "behind" the image so that you can select
    the text with your cursor (in a PC application).  But, again, you
    are stuck relying on the quality of the OCR algorithm.

    Does the PDF reflow the text so that the text size is the same
    size on all devices, including a phone?  The EPUB format does
    that. It also resizes any illustrations so that they will fit.

    No. The PDF is a (lossless) photo of the page. For "pocket books"
    (i.e., the paperbacks of the 60's), my ereader screens are large
    enough that it is as if I was holding the original book in my hand
    (but only seeing recto or verso page-at-a-time).

    If I want to read a technical paper typically typeset in 8.5x11
    format, I have to use a larger display -- or, flip the ereader to
    landscape mode (so the display is 8.5" wide) and scroll through
    the image. This is tedious for multicolumn layouts. But, I
    could also view them "full size" on a PC's display (24" diagonal
    displays are about 11 inches tall) or on a small (~14") laptop,
    "sideways".

    Eventually, I will buy a larger tablet and install all of these
    documents in its internal memory; so, the tablet will be my "library".

    Even larger pages (e.g., B-size foldout scehmatics) require even larger displays. But, you also would likely want the ability to easily
    zoom and pan the display to examine the finer details in such documents.

    Illustrations of course have to be handled seperately.  I run
    any page with illustrations through a graphics programs, such as
    GIMP to do any cleanup, such as cropping the image to provide
    only the illustration.  Then I reinsert the illustration into
    the text file at the appropriate location.

    Yes, I have to do this with "foldout" pages that exceed the
    capabilities of the "small" scanner. This makes scanning service
    manuals a bit tedious as they may have five 8.5x11 pages followed
    by three 11x17 foldouts followed by more 8.5x11's, etc.

    But, assembling the final document (PDF) is relatively easy in Acrobat;
    I just import ALL of the images and then rearrange their order using
    the graphical thumbnails. If a page got scanned upside down, I can
    flip it. If pages were typeset to be read in landscape mode (e.g.,
    rotate the document to read the table on page 27), I can perform that
    rotation in the PDF so the user doesn't have to turn the screen
    sideways.

    It's also helpful as I can add other content to the "container"
    to preserve it as originally packaged. E.g., audio files that
    accompany the text or program listings that really want to be
    *attachments* and not "in-lined".

    Also I don't want to destroy my paper books.  I like reading
    books on paper. After all that is how I grew up.

    Agreed.  But, if you are proactively safeguarding your collection against >> the possibility of downsizing into a different living situation, you've
    already decided that they will be discarded -- even if not "destroyed".

    As I say, I prefer real books, and have the space to keep them.

    Then you are scanning as a preemptive action in the hope that
    when you need to be rid of the paper, *someone* will be able
    to do that (I make my plans assuming that I may not have the
    same physical or mental competencies as I do, now).

    E.g., SWMBO would curse me up and down if *she* had to sort
    through all of my books -- even if she KNEW that they should
    all be discarded ("Why the hell didn't HE do this??")

    Ditto my business records, software archive, financial
    records, etc. (I've seen too many people "rushed" by
    "unexpected events" that have had to take a broad brush
    approach to discarding "stuff" because they didn't have
    the time or abilities to more selectively filter it)

    "Paper" is relatively easy. Add to that having to sort through
    prototypes, patent proofs, test equipment, components, supplies,
    etc. and you can see how desirable it is to be *rid* of the paper
    ASAP!

    [Imagine finding yourself in an extended care facility (stroke,
    mobility, blindness, injury, etc.) and never really being able to
    return home to PERSONALLY sort out YOUR things. "Imposing" that
    task (chore!) on someone else -- and wondering what might not
    be happening as YOU would have intended, had you been present to
    "supervise" the activity]

    When I do have to dispose of them I will sell them to
    a used books store, or donate them to Goodwill,
    which, here in Tulsa, has a pretty good used book store in
    the back corner

    Bill


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  • From Don Y@21:1/5 to BillGill on Tue Jul 9 16:41:35 2024
    On 7/9/2024 7:54 AM, BillGill wrote:
    No.  The PDF is a (lossless) photo of the page.  For "pocket books"
    (i.e., the paperbacks of the 60's), my ereader screens are large
    enough that it is as if I was holding the original book in my hand
    (but only seeing recto or verso page-at-a-time).

    One advantage of the EPUB format is that it can be read on
    any size device, including a phone, although I for one can
    not imagine trying to read on a phone.

    I can read a PDF of a "pocket book" paperback on a cell phone
    by twisting the phone sideways as most pocketbooks have only
    a single column layout and the column width is ~4 inches -- easily
    accommodated by most smart-phone screens.

    The fact that you have to scroll the image is no different
    than having to "flip" pages in an epub -- esp as epub "screens"
    don't correspond 1:1 with book *pages*.

    On an ereader, the entire PDF image appears on the screen as
    if it was a physical paper book you were holding.

    Where PDFs fall down is multicolumn layouts (where you have
    to "pan and scan" to find the next line of text as you move
    from the bottom of one column to the top of the next).
    Or, in wide page layouts that require scrolling left-right
    to parse individual lines.

    But, if you're just scanning paperback novels, chances are
    its a single column layout. Newer texts have wider pages
    so you'd want a wider screen (e.g., SWMBO uses a Nook HD
    which is about the size of an iPad screen) if you wanted to view
    PDF scans of those pages.

    [Imagine finding yourself in an extended care facility (stroke,
    mobility, blindness, injury, etc.) and never really being able to
    return home to PERSONALLY sort out YOUR things.  "Imposing" that
    task (chore!) on someone else -- and wondering what might not
    be happening as YOU would have intended, had you been present to
    "supervise" the activity]

    I am only scanning in my collection of fiction books.  Sorting
    them should be relatively easy, although my daughter is also
    a reader, so she might have a problem sorting out the ones she
    wants to keep.

    Do you really think she will want to spend that time when she
    also has your sudden "malady" weighing on her mind?

    I've watched many friends/neighbors moved into assisted care
    (or worse, "memory care") facilities. Leaving their "stuff"
    and "home" behind is very traumatic for them. Esp as they
    often have delayed that transition to a point where adjusting
    to a new environment (new friends, etc.) is exceedingly
    difficult.

    The woman two doors down made that transition a few years
    ago -- at the insistence of her children (cuz she was
    unable to take care of her own physical needs). Because
    her mind had deteriorated a fair bit, she was unable to
    process the fact that she was no longer in "her" home which
    just added to her confusion.

    Another friend delayed that transition until a few months before
    (unexpectedly) dying. Leaving her husband to deal with the
    loss of their long-term "dream home" (and possessions) on top
    of her death.

    The folks across the street just moved east -- to enjoy the
    cold winters? They will similarly discover that their memories
    of what life WAS like, back there, won't serve them well. And,
    their bodies won't be as able to deal with iced sidewalks,
    cold/rainy weather, experiencing the deaths of their old friends
    "first hand" (vs. getting an email about someone's passing),
    the added chores consequential to life, there, etc. This on top
    of having to liquidate their home (possessions) of 40 years, here.

    I'm not keen on finding myself (or SWMBO after my demise) in
    a similarly traumatic "adjustment". To that end, I can afford
    to rid myself of dead trees, paper financial/business records,
    test equipment, etc.

    "What do I *need* this for, at this point in my life?"

    YMMV. But don't underestimate the impact it will have on
    those around you!

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  • From Don Y@21:1/5 to BillGill on Wed Jul 10 09:35:36 2024
    On 7/10/2024 6:28 AM, BillGill wrote:
    On 7/9/2024 6:41 PM, Don Y wrote:
    I've watched many friends/neighbors moved into assisted care
    (or worse, "memory care") facilities.  Leaving their "stuff"
    and "home" behind is very traumatic for them.  Esp as they
    often have delayed that transition to a point where adjusting
    to a new environment (new friends, etc.) is exceedingly
    difficult.

    I'm not keen on finding myself (or SWMBO after my demise) in
    a similarly traumatic "adjustment".  To that end, I can afford
    to rid myself of dead trees, paper financial/business records,
    test equipment, etc.

    "What do I *need* this for, at this point in my life?"

    YMMV.  But don't underestimate the impact it will have on
    those around you!

    My position is different from those you mentioned.  My
    daughter lives in a rented house, while I live mortgage
    free.  20 years ago when my brother died I made a vow
    not to collect 'stuff'.

    Been there, done that. Yet, on my biweekly trips to drop off
    kit at the local recycler, I always seem to "find" something
    interesting to bring home. :< Thankfully, the trend has
    consistently been to come back with less than I set out
    (though why bring back ANYTHING? There's absolutely nothing
    that I *need* that I don't already *have*!)

    I have been through the house
    several times trying to get rid of 'stuff'.

    I do this weekly. I treat it as part of the "job" of dying.
    Why wait until the last minute? :>

      It is of
    course a losing battle, but when I die I will not leave
    huge lots of stuff cluttering up the house.

    A friend has been tormenting himself over his "matchbox"
    car collection. Several thousand, mostly NIB. I've suggested
    he gift them to his young (5-ish) neighbor: "Are you kidding?
    They're worth thousands of dollars!"

    "Then why not sell them -- or, gift them to another collector -- while
    you are alive/capable of doing so? What do you think your wife is
    going to do with them once they have no use to you?"

    It is interesting to watch people squirm over "things" that have
    little real value to them -- other than to say they *have* those things.

    OTOH, SWMBO has a large collection of art books (dead trees) and
    frequently talks of donating them to a local school, etc. I have
    consistently suggested she keep them as she is ALWAYS rediscovering
    a title that she hadn't looked through in quite some time and
    getting enjoyment from it.

    "I can box them up for you and donate them when/if the time comes..."

    OToOH, I've probably 40 pounds of DIMMs/SIMMs accumulated over the years.
    I routinely find myself digging through it all (sorted) as I find need
    for a particular size/speed/flavor device for some bit of kit that
    I'm playing with. So, resist discarding it as portection against some
    future need. OTOH, if I end up with a bit of kit that needs some hard-to-find memory, maybe I don't need that piece of kit???

    My daughter's
    main problem in that regard is deciding how to merge
    her furnishings into my house.  Hopefully she will be
    able to just make the cut and then call the Salvation
    Army to take away what she doesn't need.

    We try to be minimalist in terms of furnishings. How many items do two
    people need to sit on?

    And 86 the "knick-knacks"! Sheesh! A neighbor's house is cluttered
    with them. She spends her time dusting them. Hint: if you didn't
    have all that clutter, you could spend your waking hours doing something
    other than dusting!

    [How many people find themselves, on their deathbeds, saying "I should have dusted more"?]

    And she has,
    unfortunately, just been through that experience.  Her
    boy friend died and she had to separate his stuff from
    her stuff and get it appropriately dispersed.

    I think that sort of divestment is probably easier. The
    attachment is likely not as long-lived/intense. It may
    be a reminder but it's not a fixture.

    I can recall choosing NOT to preserve my childhood bed when
    my folks moved out of that home. I've only slept on it a few
    nights per year so it's not like I'm going to "miss" it!
    "It's just a bed"

    So her big problem will be sorting my library, and she
    will be happy to have a lot of the books.  Sorting them
    will be a chore, but not one that, hopefully, will
    call out a lot of memories.

    Until she finds herself in YOUR situation?

    I really regret not having kept electronic versions of my earlier
    documents. At the time, I made the deliberate decision to opt
    for rendering them to paper as it is more portable (could you
    read an 8 inch, hard-sectored floppy? have a bernoulli drive
    handy? 9T tape?)

    But, trying to maintain portable electronic forms is a perpetual
    activity. And, verifying that the files are still intact...

    Which doesn't mean that she won't be distressed by my
    passing, it just means that I will try to leave as
    little for her to do as I can.

    Kudos to you! Too often, it's just "not my problem -- I'm dead!"

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