test
On Tue, 5 Dec 2023 07:24:08 -0800 (PST), Ethan Johnson
<ethan.jonhson05234@gmail.com> wrote:
test
OK
On 2023-12-05, John Larkin wrote:
On Tue, 5 Dec 2023 07:24:08 -0800 (PST), Ethan Johnson >><ethan.jonhson05234@gmail.com> wrote:
test
OK
John,
They might need something a little clearer -- perhaps this:
"Test Successfully Failed. Message wasn't sent to a -test group."
(and perhaps guidance in picking a better news client)
On Tue, 5 Dec 2023 16:50:52 -0000 (UTC), Dan Purgert <dan@djph.net>
wrote:
On 2023-12-05, John Larkin wrote:
On Tue, 5 Dec 2023 07:24:08 -0800 (PST), Ethan Johnson >>><ethan.jonhson05234@gmail.com> wrote:
test
OK
John,
They might need something a little clearer -- perhaps this:
"Test Successfully Failed. Message wasn't sent to a -test group."
(and perhaps guidance in picking a better news client)
Maybe EJ wants to discuss electronics. In that case, welcome.
I was just thinking about (and spicing) DDS lowpass filters. With
enough DAC bits and a really fast clock, you barely need one.
On 2023-12-06, John Larkin wrote:
On Tue, 5 Dec 2023 16:50:52 -0000 (UTC), Dan Purgert <dan@djph.net>
wrote:
On 2023-12-05, John Larkin wrote:
On Tue, 5 Dec 2023 07:24:08 -0800 (PST), Ethan Johnson >>>><ethan.jonhson05234@gmail.com> wrote:
test
OK
John,
They might need something a little clearer -- perhaps this:
"Test Successfully Failed. Message wasn't sent to a -test group."
(and perhaps guidance in picking a better news client)
Maybe EJ wants to discuss electronics. In that case, welcome.
Hope so, it'll be a nice change from the OT posts (of which I'm guilty
of making too :| )
I was just thinking about (and spicing) DDS lowpass filters. With
enough DAC bits and a really fast clock, you barely need one.
Spice is one of those things I ought to learn at some point.
For now, I'm safely separated from most analog (RC lowpass filters on
inputs are about the extent of it) while I work through wrapping my head >around the new (to me) 0-series AVR chips and write up some drivers for
the onboard peripherals.
On Wed, 6 Dec 2023 12:23:51 -0000 (UTC), Dan Purgert <dan@djph.net>
wrote:
On 2023-12-06, John Larkin wrote:
On Tue, 5 Dec 2023 16:50:52 -0000 (UTC), Dan Purgert <dan@djph.net>
wrote:
On 2023-12-05, John Larkin wrote:
On Tue, 5 Dec 2023 07:24:08 -0800 (PST), Ethan Johnson
<ethan.jonhson05234@gmail.com> wrote:
test
OK
John,
They might need something a little clearer -- perhaps this:
"Test Successfully Failed. Message wasn't sent to a -test group."
(and perhaps guidance in picking a better news client)
Maybe EJ wants to discuss electronics. In that case, welcome.
Hope so, it'll be a nice change from the OT posts (of which I'm guilty
of making too :| )
I was just thinking about (and spicing) DDS lowpass filters. With
enough DAC bits and a really fast clock, you barely need one.
Spice is one of those things I ought to learn at some point.
LT Spice is easy to learn and use. It has some logic elements too, so
you can make mixed-type circuits, like delta-sigma modulators or DDS
filters and even real logic systems, admittedly simple ones. Things
like pseudo-random shift registers for example.
It is cool to do FFT spectral analysis and such on digital circuits.
It's useful for leaving behind documentation, design notes, too. IF
one bothers to properly label things, which hardly anyone does.
For now, I'm safely separated from most analog (RC lowpass filters on
inputs are about the extent of it) while I work through wrapping my head
around the new (to me) 0-series AVR chips and write up some drivers for
the onboard peripherals.
I'm lobbying for our next-gen small uP to be RP2040. Digikey has 25K
in stock for 70 cents at any quantity.
On 2023-12-06 12:08, John Larkin wrote:
On Wed, 6 Dec 2023 12:23:51 -0000 (UTC), Dan Purgert <dan@djph.net>We're thinking along the same lines.
wrote:
On 2023-12-06, John Larkin wrote:
On Tue, 5 Dec 2023 16:50:52 -0000 (UTC), Dan Purgert <dan@djph.net>
wrote:
On 2023-12-05, John Larkin wrote:
On Tue, 5 Dec 2023 07:24:08 -0800 (PST), Ethan Johnson
<ethan.jonhson05234@gmail.com> wrote:
test
OK
John,
They might need something a little clearer -- perhaps this:
"Test Successfully Failed. Message wasn't sent to a -test group." >>>>>
(and perhaps guidance in picking a better news client)
Maybe EJ wants to discuss electronics. In that case, welcome.
Hope so, it'll be a nice change from the OT posts (of which I'm guilty
of making too :| )
I was just thinking about (and spicing) DDS lowpass filters. With
enough DAC bits and a really fast clock, you barely need one.
Spice is one of those things I ought to learn at some point.
LT Spice is easy to learn and use. It has some logic elements too, so
you can make mixed-type circuits, like delta-sigma modulators or DDS
filters and even real logic systems, admittedly simple ones. Things
like pseudo-random shift registers for example.
It is cool to do FFT spectral analysis and such on digital circuits.
It's useful for leaving behind documentation, design notes, too. IF
one bothers to properly label things, which hardly anyone does.
For now, I'm safely separated from most analog (RC lowpass filters on
inputs are about the extent of it) while I work through wrapping my head >>> around the new (to me) 0-series AVR chips and write up some drivers for
the onboard peripherals.
I'm lobbying for our next-gen small uP to be RP2040. Digikey has 25K
in stock for 70 cents at any quantity.
Cheers
Phil Hobbs
On Wed, 6 Dec 2023 12:23:51 -0000 (UTC), Dan Purgert <dan@djph.net>
Spice is one of those things I ought to learn at some point.
LT Spice is easy to learn and use. It has some logic elements too, so
you can make mixed-type circuits, like delta-sigma modulators or DDS
filters and even real logic systems, admittedly simple ones. Things
like pseudo-random shift registers for example. [...]
For now, I'm safely separated from most analog (RC lowpass filters on >>inputs are about the extent of it) while I work through wrapping my head >>around the new (to me) 0-series AVR chips and write up some drivers for
the onboard peripherals.
I'm lobbying for our next-gen small uP to be RP2040. Digikey has 25K
in stock for 70 cents at any quantity.
On Wed, 6 Dec 2023 18:02:06 -0500, Phil Hobbs ><pcdhSpamMeSenseless@electrooptical.net> wrote:
On 2023-12-06 12:08, John Larkin wrote:
On Wed, 6 Dec 2023 12:23:51 -0000 (UTC), Dan Purgert <dan@djph.net>We're thinking along the same lines.
wrote:
On 2023-12-06, John Larkin wrote:
On Tue, 5 Dec 2023 16:50:52 -0000 (UTC), Dan Purgert <dan@djph.net>
wrote:
On 2023-12-05, John Larkin wrote:
On Tue, 5 Dec 2023 07:24:08 -0800 (PST), Ethan Johnson
<ethan.jonhson05234@gmail.com> wrote:
test
OK
John,
They might need something a little clearer -- perhaps this:
"Test Successfully Failed. Message wasn't sent to a -test group." >>>>>>
(and perhaps guidance in picking a better news client)
Maybe EJ wants to discuss electronics. In that case, welcome.
Hope so, it'll be a nice change from the OT posts (of which I'm guilty >>>> of making too :| )
I was just thinking about (and spicing) DDS lowpass filters. With
enough DAC bits and a really fast clock, you barely need one.
Spice is one of those things I ought to learn at some point.
LT Spice is easy to learn and use. It has some logic elements too, so
you can make mixed-type circuits, like delta-sigma modulators or DDS
filters and even real logic systems, admittedly simple ones. Things
like pseudo-random shift registers for example.
It is cool to do FFT spectral analysis and such on digital circuits.
It's useful for leaving behind documentation, design notes, too. IF
one bothers to properly label things, which hardly anyone does.
For now, I'm safely separated from most analog (RC lowpass filters on
inputs are about the extent of it) while I work through wrapping my head >>>> around the new (to me) 0-series AVR chips and write up some drivers for >>>> the onboard peripherals.
I'm lobbying for our next-gen small uP to be RP2040. Digikey has 25K
in stock for 70 cents at any quantity.
Cheers
Phil Hobbs
I've had guys spend many weeks just setting up a PC and linux and dev
tools to use a Zynq or whatever.
https://www.explainxkcd.com/wiki/index.php/456:_Cautionary
An RP400 is the whole dev/debug system for $75, and runs right out of
the box. No FlexLM or any such nonsense.
I'm planning a PC board that will plug into the RP400 on one end and
into the DUT on the other end, two ribbon cables. My products will
have an RP2040, a PoE power supply, a gbit ethernet chip, USB, and a
standard fine-pitch ribbon cable connector to the debug board.
https://www.dropbox.com/scl/fi/1c06h0u101c9cyh2d6ifi/Z556_1.jpg?rlkey=mswvdbxm2q9m9ks7un90cvax9&raw=1
I figure I can use one 2040 core for all the overhead nonsense:
ethernet, usb, command parsing, calibrations, whatever. And run the
other core out of sram bare-metal bit-bang i/o, which could in many
cases eliminate needing an FPGA.
On Wed, 6 Dec 2023 18:02:06 -0500, Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> wrote:
On 2023-12-06 12:08, John Larkin wrote:
On Wed, 6 Dec 2023 12:23:51 -0000 (UTC), Dan Purgert <dan@djph.net>We're thinking along the same lines.
wrote:
On 2023-12-06, John Larkin wrote:
On Tue, 5 Dec 2023 16:50:52 -0000 (UTC), Dan Purgert <dan@djph.net>
wrote:
On 2023-12-05, John Larkin wrote:
On Tue, 5 Dec 2023 07:24:08 -0800 (PST), Ethan Johnson
<ethan.jonhson05234@gmail.com> wrote:
test
OK
John,
They might need something a little clearer -- perhaps this:
"Test Successfully Failed. Message wasn't sent to a -test group." >>>>>>
(and perhaps guidance in picking a better news client)
Maybe EJ wants to discuss electronics. In that case, welcome.
Hope so, it'll be a nice change from the OT posts (of which I'm guilty >>>> of making too :| )
I was just thinking about (and spicing) DDS lowpass filters. With
enough DAC bits and a really fast clock, you barely need one.
Spice is one of those things I ought to learn at some point.
LT Spice is easy to learn and use. It has some logic elements too, so
you can make mixed-type circuits, like delta-sigma modulators or DDS
filters and even real logic systems, admittedly simple ones. Things
like pseudo-random shift registers for example.
It is cool to do FFT spectral analysis and such on digital circuits.
It's useful for leaving behind documentation, design notes, too. IF
one bothers to properly label things, which hardly anyone does.
For now, I'm safely separated from most analog (RC lowpass filters on
inputs are about the extent of it) while I work through wrapping my head >>>> around the new (to me) 0-series AVR chips and write up some drivers for >>>> the onboard peripherals.
I'm lobbying for our next-gen small uP to be RP2040. Digikey has 25K
in stock for 70 cents at any quantity.
Cheers
Phil Hobbs
I've had guys spend many weeks just setting up a PC and linux and dev
tools to use a Zynq or whatever.
https://www.explainxkcd.com/wiki/index.php/456:_Cautionary
An RP400 is the whole dev/debug system for $75, and runs right out of
the box. No FlexLM or any such nonsense.
I'm planning a PC board that will plug into the RP400 on one end and
into the DUT on the other end, two ribbon cables. My products will
have an RP2040, a PoE power supply, a gbit ethernet chip, USB, and a
standard fine-pitch ribbon cable connector to the debug board.
https://www.dropbox.com/scl/fi/1c06h0u101c9cyh2d6ifi/Z556_1.jpg?rlkey=mswvdbxm2q9m9ks7un90cvax9&raw=1
I figure I can use one 2040 core for all the overhead nonsense:
ethernet, usb, command parsing, calibrations, whatever. And run the
other core out of sram bare-metal bit-bang i/o, which could in many
cases eliminate needing an FPGA.
Wanna collaborate?
I'm wondering if I can decimate an isolated delta-sigma ADC in
software, with a little help from one of the SPI interfaces.
I can certainly bit-bang a VME bus.
Maybe do a software DDS sine generator, bang a DAC and an ADC, and do
some software synchronous detection? I want to measure a capacitor
that's 100 feet away, or some lvdt's and synchros.
This could be fun.
On 2023-12-06 20:13, john larkin wrote:
On Wed, 6 Dec 2023 18:02:06 -0500, Phil HobbsSure, I'm in. Simon's the actual s/w guy round here these days, but I'm
<pcdhSpamMeSenseless@electrooptical.net> wrote:
On 2023-12-06 12:08, John Larkin wrote:
On Wed, 6 Dec 2023 12:23:51 -0000 (UTC), Dan Purgert <dan@djph.net>We're thinking along the same lines.
wrote:
On 2023-12-06, John Larkin wrote:
On Tue, 5 Dec 2023 16:50:52 -0000 (UTC), Dan Purgert <dan@djph.net> >>>>>> wrote:
On 2023-12-05, John Larkin wrote:
On Tue, 5 Dec 2023 07:24:08 -0800 (PST), Ethan Johnson
<ethan.jonhson05234@gmail.com> wrote:
test
OK
John,
They might need something a little clearer -- perhaps this:
"Test Successfully Failed. Message wasn't sent to a -test group." >>>>>>>
(and perhaps guidance in picking a better news client)
Maybe EJ wants to discuss electronics. In that case, welcome.
Hope so, it'll be a nice change from the OT posts (of which I'm guilty >>>>> of making too :| )
I was just thinking about (and spicing) DDS lowpass filters. With
enough DAC bits and a really fast clock, you barely need one.
Spice is one of those things I ought to learn at some point.
LT Spice is easy to learn and use. It has some logic elements too, so
you can make mixed-type circuits, like delta-sigma modulators or DDS
filters and even real logic systems, admittedly simple ones. Things
like pseudo-random shift registers for example.
It is cool to do FFT spectral analysis and such on digital circuits.
It's useful for leaving behind documentation, design notes, too. IF
one bothers to properly label things, which hardly anyone does.
For now, I'm safely separated from most analog (RC lowpass filters on >>>>> inputs are about the extent of it) while I work through wrapping my head >>>>> around the new (to me) 0-series AVR chips and write up some drivers for >>>>> the onboard peripherals.
I'm lobbying for our next-gen small uP to be RP2040. Digikey has 25K
in stock for 70 cents at any quantity.
Cheers
Phil Hobbs
I've had guys spend many weeks just setting up a PC and linux and dev
tools to use a Zynq or whatever.
https://www.explainxkcd.com/wiki/index.php/456:_Cautionary
An RP400 is the whole dev/debug system for $75, and runs right out of
the box. No FlexLM or any such nonsense.
I'm planning a PC board that will plug into the RP400 on one end and
into the DUT on the other end, two ribbon cables. My products will
have an RP2040, a PoE power supply, a gbit ethernet chip, USB, and a
standard fine-pitch ribbon cable connector to the debug board.
https://www.dropbox.com/scl/fi/1c06h0u101c9cyh2d6ifi/Z556_1.jpg?rlkey=mswvdbxm2q9m9ks7un90cvax9&raw=1
I figure I can use one 2040 core for all the overhead nonsense:
ethernet, usb, command parsing, calibrations, whatever. And run the
other core out of sram bare-metal bit-bang i/o, which could in many
cases eliminate needing an FPGA.
Wanna collaborate?
I'm wondering if I can decimate an isolated delta-sigma ADC in
software, with a little help from one of the SPI interfaces.
I can certainly bit-bang a VME bus.
Maybe do a software DDS sine generator, bang a DAC and an ADC, and do
some software synchronous detection? I want to measure a capacitor
that's 100 feet away, or some lvdt's and synchros.
This could be fun.
very interested in figuring out better ways to do finely interleaved
control and data acq, which is hard with a PC or Linux SBC.
Cheers
Phil Hobbs
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