https://www.dropbox.com/scl/fo/s6wfz2xtdyd6tv32tq3fp/AET6J4oF84HG2hJMeST6F-E?rlkey=acyvuv4z0h2kg0x97azbed8uo&dl=0
"john larkin" <jl@glen--canyon.com> wrote in message news:tipofjdtie76lbtd7lc2ger5uo7sglq3p5@4ax.com...
https://www.dropbox.com/scl/fo/s6wfz2xtdyd6tv32tq3fp/AET6J4oF84HG2hJMeST6F-E?rlkey=acyvuv4z0h2kg0x97azbed8uo&dl=0
Any discernible numbers on the chips underneath?
https://silvertel.com/wp-content/uploads/2022/05/market-1-sm.png
On Tue, 1 Oct 2024 19:06:12 -0400, "Edward Rawde"
<invalid@invalid.invalid> wrote:
"john larkin" <jl@glen--canyon.com> wrote in message news:tipofjdtie76lbtd7lc2ger5uo7sglq3p5@4ax.com...
https://www.dropbox.com/scl/fo/s6wfz2xtdyd6tv32tq3fp/AET6J4oF84HG2hJMeST6F-E?rlkey=acyvuv4z0h2kg0x97azbed8uo&dl=0
Any discernible numbers on the chips underneath?
https://silvertel.com/wp-content/uploads/2022/05/market-1-sm.png
I added a couple of pix to the folder.
The so8 ic is an Onsemi STX9B, but I haven't been able to track down a
data sheet.
I've been doing my own PoE experimemts and so far nothing makes sense.
https://www.dropbox.com/scl/fo/s6wfz2xtdyd6tv32tq3fp/AET6J4oF84HG2hJMeST6F-E?rlkey=acyvuv4z0h2kg0x97azbed8uo&dl=0
On a sunny day (Tue, 01 Oct 2024 14:16:09 -0700) it happened john larkin ><jl@glen--canyon.com> wrote in <tipofjdtie76lbtd7lc2ger5uo7sglq3p5@4ax.com>:
https://www.dropbox.com/scl/fo/s6wfz2xtdyd6tv32tq3fp/AET6J4oF84HG2hJMeST6F-E?rlkey=acyvuv4z0h2kg0x97azbed8uo&dl=0
Cannot make out much from those x-rays, pictures are better...
you can probably see the traces just like that?
On Wed, 02 Oct 2024 06:22:43 GMT, Jan Panteltje <alien@comet.invalid>
wrote:
On a sunny day (Tue, 01 Oct 2024 14:16:09 -0700) it happened john larkin >><jl@glen--canyon.com> wrote in <tipofjdtie76lbtd7lc2ger5uo7sglq3p5@4ax.com>: >>
https://www.dropbox.com/scl/fo/s6wfz2xtdyd6tv32tq3fp/AET6J4oF84HG2hJMeST6F-E?rlkey=acyvuv4z0h2kg0x97azbed8uo&dl=0
Cannot make out much from those x-rays, pictures are better...
you can probably see the traces just like that?
The x-rays are fun, but are admittedly more useful for an opaque
potted module or an IC or discrete semi. I can prety well trace the
Silvertel without them.
I have a gigantic scary Carribean guy who does the xrays and I wanted
an excuse for taking him to lunch, which turned into an interesting
hike around The Bernal Cut. He trashed the xray system software, and
had to rebuild it, and now it can do movies, which is great.
I'd like to have some products that can be powered by PoE or a wart,
and may want to put two 24-volt PoE supplies in series to get 48, so I
need to understand how they work. The xrays just help a bit.
(When burials were outlawed in San Francisco, a railroad was
constructed to Colma for all the dead bodies and headstones. That
forced the Bernal Cut to be dug with people and mules. Colma now has
more dead people than live ones. Some parts of San Francisco are paved
with old headstones that nobody wanted to pay to ship. https://www.bernalcut.org/ )
On Wed, 02 Oct 2024 06:22:43 GMT, Jan Panteltje <alien@comet.invalid>
wrote:
On a sunny day (Tue, 01 Oct 2024 14:16:09 -0700) it happened john larkin >><jl@glen--canyon.com> wrote in <tipofjdtie76lbtd7lc2ger5uo7sglq3p5@4ax.com>: >>
https://www.dropbox.com/scl/fo/s6wfz2xtdyd6tv32tq3fp/AET6J4oF84HG2hJMeST6F-E?rlkey=acyvuv4z0h2kg0x97azbed8uo&dl=0
Cannot make out much from those x-rays, pictures are better...
you can probably see the traces just like that?
The x-rays are fun, but are admittedly more useful for an opaque
potted module or an IC or discrete semi. I can prety well trace the
Silvertel without them.
I have a gigantic scary Carribean guy who does the xrays and I wanted
an excuse for taking him to lunch, which turned into an interesting
hike around The Bernal Cut. He trashed the xray system software, and
had to rebuild it, and now it can do movies, which is great.
I'd like to have some products that can be powered by PoE or a wart,
and may want to put two 24-volt PoE supplies in series to get 48, so I
need to understand how they work. The xrays just help a bit.
(When burials were outlawed in San Francisco, a railroad was
constructed to Colma for all the dead bodies and headstones. That
forced the Bernal Cut to be dug with people and mules. Colma now has
more dead people than live ones. Some parts of San Francisco are paved
with old headstones that nobody wanted to pay to ship. >https://www.bernalcut.org/ )
On a sunny day (Wed, 02 Oct 2024 07:45:04 -0700) it happened john larkin <JL@gct.com> wrote in <v6mqfjd93ib6q8j7d7ontsaouidieh5b2u@4ax.com>:
On Wed, 02 Oct 2024 06:22:43 GMT, Jan Panteltje <alien@comet.invalid>
wrote:
On a sunny day (Tue, 01 Oct 2024 14:16:09 -0700) it happened john larkin >>> <jl@glen--canyon.com> wrote in <tipofjdtie76lbtd7lc2ger5uo7sglq3p5@4ax.com>:
Found it with google maps...
Do you make Xray movies of living things?
On 10/2/2024 8:46 AM, Edward Rawde wrote:
I did PoE with LTC4267 some years ago such that 12V could also be supplied from a wart.
Fully isolated with a PA1138 transformer.
How did you inform the PD of the fact that it was no longer
dependant on (and controllable by) the PSE? Or, did you forego
in-band reconfiguration and power control?
These days I'd look at MP8017
I'm experimenting with integrating the PSE & PD functionalities
to better "tune" the system to available power.
I did PoE with LTC4267 some years ago such that 12V could also be supplied from a wart.
Fully isolated with a PA1138 transformer.
These days I'd look at MP8017
"Don Y" <blockedofcourse@foo.invalid> wrote in message news:vdjvmh$3aipj$1@dont-email.me...
On 10/2/2024 8:46 AM, Edward Rawde wrote:
I did PoE with LTC4267 some years ago such that 12V could also be supplied from a wart.
Fully isolated with a PA1138 transformer.
How did you inform the PD of the fact that it was no longer
dependant on (and controllable by) the PSE? Or, did you forego
in-band reconfiguration and power control?
It wasn't necessary for the fairly specialized product which was configured at install time with power from PoE or wart but not
both.
I seem to recall at least one accidental connection of both with no detrimental effect but it wasn't investigated further.
On 2024-10-02 20:02, Edward Rawde wrote:
"Don Y" <blockedofcourse@foo.invalid> wrote in message news:vdjvmh$3aipj$1@dont-email.me...
On 10/2/2024 8:46 AM, Edward Rawde wrote:
I did PoE with LTC4267 some years ago such that 12V could also be supplied from a wart.
Fully isolated with a PA1138 transformer.
How did you inform the PD of the fact that it was no longer
dependant on (and controllable by) the PSE? Or, did you forego
in-band reconfiguration and power control?
It wasn't necessary for the fairly specialized product which was configured at install time with power from PoE or wart but not
both.
I seem to recall at least one accidental connection of both with no detrimental effect but it wasn't investigated further.
I've seen a problem when the PoE module had a TL431 + optocoupler at it's output as feedback circuit.
A limiting resistor was lacking, and +12.3V from a wart turned the TL431 fully on and destroyed the optocoupler.
Subsequent PoE operation then had an open loop and destroyed the supplied circuit.
Arie
"Don Y" <blockedofcourse@foo.invalid> wrote in message news:vdjvmh$3aipj$1@dont-email.me...
On 10/2/2024 8:46 AM, Edward Rawde wrote:
I did PoE with LTC4267 some years ago such that 12V could also be supplied from a wart.
Fully isolated with a PA1138 transformer.
How did you inform the PD of the fact that it was no longer
dependant on (and controllable by) the PSE? Or, did you forego
in-band reconfiguration and power control?
It wasn't necessary for the fairly specialized product which was configured at install time with power from PoE or wart but not
both.
I seem to recall at least one accidental connection of both with no detrimental effect but it wasn't investigated further.
"john larkin" <JL@gct.com> wrote in message news:v6mqfjd93ib6q8j7d7ontsaouidieh5b2u@4ax.com...
On Wed, 02 Oct 2024 06:22:43 GMT, Jan Panteltje <alien@comet.invalid>
wrote:
On a sunny day (Tue, 01 Oct 2024 14:16:09 -0700) it happened john larkin >>><jl@glen--canyon.com> wrote in <tipofjdtie76lbtd7lc2ger5uo7sglq3p5@4ax.com>: >>>
https://www.dropbox.com/scl/fo/s6wfz2xtdyd6tv32tq3fp/AET6J4oF84HG2hJMeST6F-E?rlkey=acyvuv4z0h2kg0x97azbed8uo&dl=0
Cannot make out much from those x-rays, pictures are better...
you can probably see the traces just like that?
The x-rays are fun, but are admittedly more useful for an opaque
potted module or an IC or discrete semi. I can prety well trace the
Silvertel without them.
I have a gigantic scary Carribean guy who does the xrays and I wanted
an excuse for taking him to lunch, which turned into an interesting
hike around The Bernal Cut. He trashed the xray system software, and
had to rebuild it, and now it can do movies, which is great.
I'd like to have some products that can be powered by PoE or a wart,
and may want to put two 24-volt PoE supplies in series to get 48, so I
need to understand how they work. The xrays just help a bit.
If Ag9900 just works then why would you care how?
On 2024-10-02 20:02, Edward Rawde wrote:
"Don Y" <blockedofcourse@foo.invalid> wrote in message news:vdjvmh$3aipj$1@dont-email.me...
On 10/2/2024 8:46 AM, Edward Rawde wrote:
I did PoE with LTC4267 some years ago such that 12V could also be supplied from a wart.
Fully isolated with a PA1138 transformer.
How did you inform the PD of the fact that it was no longer
dependant on (and controllable by) the PSE? Or, did you forego
in-band reconfiguration and power control?
It wasn't necessary for the fairly specialized product which was configured at install time with power from PoE or wart but not
both.
I seem to recall at least one accidental connection of both with no detrimental effect but it wasn't investigated further.
I've seen a problem when the PoE module had a TL431 + optocoupler at it's output as feedback circuit.
A limiting resistor was lacking, and +12.3V from a wart turned the TL431 fully on and destroyed the optocoupler.
Subsequent PoE operation then had an open loop and destroyed the supplied circuit.
Arie
"Arie de Muijnck" <noreply@ademu.nl> wrote in message news:nnd$7f138845$4f992b3a@6f6ac280155cacc4...
On 2024-10-02 20:02, Edward Rawde wrote:
"Don Y" <blockedofcourse@foo.invalid> wrote in message news:vdjvmh$3aipj$1@dont-email.me...
On 10/2/2024 8:46 AM, Edward Rawde wrote:
I did PoE with LTC4267 some years ago such that 12V could also be supplied from a wart.
Fully isolated with a PA1138 transformer.
How did you inform the PD of the fact that it was no longer
dependant on (and controllable by) the PSE? Or, did you forego
in-band reconfiguration and power control?
It wasn't necessary for the fairly specialized product which was configured at install time with power from PoE or wart but not
both.
I seem to recall at least one accidental connection of both with no detrimental effect but it wasn't investigated further.
I've seen a problem when the PoE module had a TL431 + optocoupler at it's output as feedback circuit.
A limiting resistor was lacking, and +12.3V from a wart turned the TL431 fully on and destroyed the optocoupler.
Subsequent PoE operation then had an open loop and destroyed the supplied circuit.
A seperate smaller schottky and capacitor for just the TLV431 seems to work fine in the LTC4267 simulation I just did and works
around wall wart power getting connected to the TLV431.
To disconnect wart power when PoE is operating, put a low power voltage doubler on the transformer secondary and use the 24V to
swich off a p-fet in series with wart power.
Arie
On a sunny day (Wed, 02 Oct 2024 07:45:04 -0700) it happened john larkin ><JL@gct.com> wrote in <v6mqfjd93ib6q8j7d7ontsaouidieh5b2u@4ax.com>:
On Wed, 02 Oct 2024 06:22:43 GMT, Jan Panteltje <alien@comet.invalid> >>wrote:
On a sunny day (Tue, 01 Oct 2024 14:16:09 -0700) it happened john larkin >>><jl@glen--canyon.com> wrote in <tipofjdtie76lbtd7lc2ger5uo7sglq3p5@4ax.com>: >>>
https://www.dropbox.com/scl/fo/s6wfz2xtdyd6tv32tq3fp/AET6J4oF84HG2hJMeST6F-E?rlkey=acyvuv4z0h2kg0x97azbed8uo&dl=0
Cannot make out much from those x-rays, pictures are better...
you can probably see the traces just like that?
The x-rays are fun, but are admittedly more useful for an opaque
potted module or an IC or discrete semi. I can prety well trace the >>Silvertel without them.
I have a gigantic scary Carribean guy who does the xrays and I wanted
an excuse for taking him to lunch, which turned into an interesting
hike around The Bernal Cut. He trashed the xray system software, and
had to rebuild it, and now it can do movies, which is great.
I'd like to have some products that can be powered by PoE or a wart,
and may want to put two 24-volt PoE supplies in series to get 48, so I
need to understand how they work. The xrays just help a bit.
(When burials were outlawed in San Francisco, a railroad was
constructed to Colma for all the dead bodies and headstones. That
forced the Bernal Cut to be dug with people and mules. Colma now has
more dead people than live ones. Some parts of San Francisco are paved
with old headstones that nobody wanted to pay to ship. >>https://www.bernalcut.org/ )
Found it with google maps...
Do you make Xray movies of living things?
On 2024-10-02 22:33, Edward Rawde wrote:
"Arie de Muijnck" <noreply@ademu.nl> wrote in message news:nnd$7f138845$4f992b3a@6f6ac280155cacc4...
On 2024-10-02 20:02, Edward Rawde wrote:
"Don Y" <blockedofcourse@foo.invalid> wrote in message news:vdjvmh$3aipj$1@dont-email.me...
On 10/2/2024 8:46 AM, Edward Rawde wrote:
I did PoE with LTC4267 some years ago such that 12V could also be supplied from a wart.
Fully isolated with a PA1138 transformer.
How did you inform the PD of the fact that it was no longer
dependant on (and controllable by) the PSE? Or, did you forego
in-band reconfiguration and power control?
It wasn't necessary for the fairly specialized product which was configured at install time with power from PoE or wart but not
both.
I seem to recall at least one accidental connection of both with no detrimental effect but it wasn't investigated further.
I've seen a problem when the PoE module had a TL431 + optocoupler at it's output as feedback circuit.
A limiting resistor was lacking, and +12.3V from a wart turned the TL431 fully on and destroyed the optocoupler.
Subsequent PoE operation then had an open loop and destroyed the supplied circuit.
A seperate smaller schottky and capacitor for just the TLV431 seems to work fine in the LTC4267 simulation I just did and works
around wall wart power getting connected to the TLV431.
To disconnect wart power when PoE is operating, put a low power voltage doubler on the transformer secondary and use the 24V to
swich off a p-fet in series with wart power.
Arie
Way too complex. A series resistor between TL431 and optocoupler was all that was needed.
Arie
On Wed, 2 Oct 2024 11:46:21 -0400, "Edward Rawde"
<invalid@invalid.invalid> wrote:
"john larkin" <JL@gct.com> wrote in message news:v6mqfjd93ib6q8j7d7ontsaouidieh5b2u@4ax.com...
On Wed, 02 Oct 2024 06:22:43 GMT, Jan Panteltje <alien@comet.invalid>
wrote:
On a sunny day (Tue, 01 Oct 2024 14:16:09 -0700) it happened john larkin >>>><jl@glen--canyon.com> wrote in <tipofjdtie76lbtd7lc2ger5uo7sglq3p5@4ax.com>:
https://www.dropbox.com/scl/fo/s6wfz2xtdyd6tv32tq3fp/AET6J4oF84HG2hJMeST6F-E?rlkey=acyvuv4z0h2kg0x97azbed8uo&dl=0
Cannot make out much from those x-rays, pictures are better...
you can probably see the traces just like that?
The x-rays are fun, but are admittedly more useful for an opaque
potted module or an IC or discrete semi. I can prety well trace the
Silvertel without them.
I have a gigantic scary Carribean guy who does the xrays and I wanted
an excuse for taking him to lunch, which turned into an interesting
hike around The Bernal Cut. He trashed the xray system software, and
had to rebuild it, and now it can do movies, which is great.
I'd like to have some products that can be powered by PoE or a wart,
and may want to put two 24-volt PoE supplies in series to get 48, so I
need to understand how they work. The xrays just help a bit.
If Ag9900 just works then why would you care how?
Can I overpower it with a wart? Does that need another diode?
Can I run two 24v Silvertels in series to get 48?
And I do care how things are designed.
On Wed, 2 Oct 2024 17:00:52 -0400, "Edward Rawde"
<invalid@invalid.invalid> wrote:
"john larkin" <jl@glen--canyon.com> wrote in message news:kqbrfjhrd5oto8ud8vm0395p6oo8eipige@4ax.com...
On Wed, 2 Oct 2024 11:46:21 -0400, "Edward Rawde"
<invalid@invalid.invalid> wrote:
"john larkin" <JL@gct.com> wrote in message news:v6mqfjd93ib6q8j7d7ontsaouidieh5b2u@4ax.com...
On Wed, 02 Oct 2024 06:22:43 GMT, Jan Panteltje <alien@comet.invalid> >>>>> wrote:
On a sunny day (Tue, 01 Oct 2024 14:16:09 -0700) it happened john larkin >>>>>><jl@glen--canyon.com> wrote in <tipofjdtie76lbtd7lc2ger5uo7sglq3p5@4ax.com>:
https://www.dropbox.com/scl/fo/s6wfz2xtdyd6tv32tq3fp/AET6J4oF84HG2hJMeST6F-E?rlkey=acyvuv4z0h2kg0x97azbed8uo&dl=0
Cannot make out much from those x-rays, pictures are better...
you can probably see the traces just like that?
The x-rays are fun, but are admittedly more useful for an opaque
potted module or an IC or discrete semi. I can prety well trace the
Silvertel without them.
I have a gigantic scary Carribean guy who does the xrays and I wanted >>>>> an excuse for taking him to lunch, which turned into an interesting
hike around The Bernal Cut. He trashed the xray system software, and >>>>> had to rebuild it, and now it can do movies, which is great.
I'd like to have some products that can be powered by PoE or a wart, >>>>> and may want to put two 24-volt PoE supplies in series to get 48, so I >>>>> need to understand how they work. The xrays just help a bit.
If Ag9900 just works then why would you care how?
Can I overpower it with a wart? Does that need another diode?
Maybe. See other discussion in this thread.
Can I run two 24v Silvertels in series to get 48?
I don't see why not since the data sheet says isolated.
It shouldn't be hard to verify that.
Batteries are isolated, but a series string can destroy one cell by back-biasing it.
Some power supplies will latch up, or not start up, in series with
others. Lots of suplies won't start (and may fail) if their input is
pulled negative.
As the number of items in a design increases, the probability of some
stupid error approaches unity. It's usually time efficient to be super careful, as opposed to spinning a few PCB revs.
"john larkin" <jl@glen--canyon.com> wrote in message news:kqbrfjhrd5oto8ud8vm0395p6oo8eipige@4ax.com...
On Wed, 2 Oct 2024 11:46:21 -0400, "Edward Rawde"
<invalid@invalid.invalid> wrote:
"john larkin" <JL@gct.com> wrote in message news:v6mqfjd93ib6q8j7d7ontsaouidieh5b2u@4ax.com...
On Wed, 02 Oct 2024 06:22:43 GMT, Jan Panteltje <alien@comet.invalid>
wrote:
On a sunny day (Tue, 01 Oct 2024 14:16:09 -0700) it happened john larkin >>>>><jl@glen--canyon.com> wrote in <tipofjdtie76lbtd7lc2ger5uo7sglq3p5@4ax.com>:
https://www.dropbox.com/scl/fo/s6wfz2xtdyd6tv32tq3fp/AET6J4oF84HG2hJMeST6F-E?rlkey=acyvuv4z0h2kg0x97azbed8uo&dl=0
Cannot make out much from those x-rays, pictures are better...
you can probably see the traces just like that?
The x-rays are fun, but are admittedly more useful for an opaque
potted module or an IC or discrete semi. I can prety well trace the
Silvertel without them.
I have a gigantic scary Carribean guy who does the xrays and I wanted
an excuse for taking him to lunch, which turned into an interesting
hike around The Bernal Cut. He trashed the xray system software, and
had to rebuild it, and now it can do movies, which is great.
I'd like to have some products that can be powered by PoE or a wart,
and may want to put two 24-volt PoE supplies in series to get 48, so I >>>> need to understand how they work. The xrays just help a bit.
If Ag9900 just works then why would you care how?
Can I overpower it with a wart? Does that need another diode?
Maybe. See other discussion in this thread.
Can I run two 24v Silvertels in series to get 48?
I don't see why not since the data sheet says isolated.
It shouldn't be hard to verify that.
"john larkin" <jl@glen--canyon.com> wrote in message news:kgirfj1614cfkvknad7dl2igqcb2qi5tq7@4ax.com...
On Wed, 2 Oct 2024 17:00:52 -0400, "Edward Rawde"
<invalid@invalid.invalid> wrote:
"john larkin" <jl@glen--canyon.com> wrote in message news:kqbrfjhrd5oto8ud8vm0395p6oo8eipige@4ax.com...
On Wed, 2 Oct 2024 11:46:21 -0400, "Edward Rawde"
<invalid@invalid.invalid> wrote:
"john larkin" <JL@gct.com> wrote in message news:v6mqfjd93ib6q8j7d7ontsaouidieh5b2u@4ax.com...
On Wed, 02 Oct 2024 06:22:43 GMT, Jan Panteltje <alien@comet.invalid> >>>>>> wrote:
On a sunny day (Tue, 01 Oct 2024 14:16:09 -0700) it happened john larkin >>>>>>><jl@glen--canyon.com> wrote in <tipofjdtie76lbtd7lc2ger5uo7sglq3p5@4ax.com>:
https://www.dropbox.com/scl/fo/s6wfz2xtdyd6tv32tq3fp/AET6J4oF84HG2hJMeST6F-E?rlkey=acyvuv4z0h2kg0x97azbed8uo&dl=0
Cannot make out much from those x-rays, pictures are better... >>>>>>>you can probably see the traces just like that?
The x-rays are fun, but are admittedly more useful for an opaque
potted module or an IC or discrete semi. I can prety well trace the >>>>>> Silvertel without them.
I have a gigantic scary Carribean guy who does the xrays and I wanted >>>>>> an excuse for taking him to lunch, which turned into an interesting >>>>>> hike around The Bernal Cut. He trashed the xray system software, and >>>>>> had to rebuild it, and now it can do movies, which is great.
I'd like to have some products that can be powered by PoE or a wart, >>>>>> and may want to put two 24-volt PoE supplies in series to get 48, so I >>>>>> need to understand how they work. The xrays just help a bit.
If Ag9900 just works then why would you care how?
Can I overpower it with a wart? Does that need another diode?
Maybe. See other discussion in this thread.
Can I run two 24v Silvertels in series to get 48?
I don't see why not since the data sheet says isolated.
It shouldn't be hard to verify that.
Batteries are isolated, but a series string can destroy one cell by
back-biasing it.
Some power supplies will latch up, or not start up, in series with
others. Lots of suplies won't start (and may fail) if their input is
pulled negative.
As the number of items in a design increases, the probability of some
stupid error approaches unity. It's usually time efficient to be super
careful, as opposed to spinning a few PCB revs.
Why do you need 48V ?
On Wed, 2 Oct 2024 19:02:33 -0400, "Edward Rawde"
<invalid@invalid.invalid> wrote:
"john larkin" <jl@glen--canyon.com> wrote in message news:kgirfj1614cfkvknad7dl2igqcb2qi5tq7@4ax.com...
On Wed, 2 Oct 2024 17:00:52 -0400, "Edward Rawde"
<invalid@invalid.invalid> wrote:
"john larkin" <jl@glen--canyon.com> wrote in message news:kqbrfjhrd5oto8ud8vm0395p6oo8eipige@4ax.com...
On Wed, 2 Oct 2024 11:46:21 -0400, "Edward Rawde"
<invalid@invalid.invalid> wrote:
"john larkin" <JL@gct.com> wrote in message news:v6mqfjd93ib6q8j7d7ontsaouidieh5b2u@4ax.com...
On Wed, 02 Oct 2024 06:22:43 GMT, Jan Panteltje <alien@comet.invalid> >>>>>>> wrote:
On a sunny day (Tue, 01 Oct 2024 14:16:09 -0700) it happened john larkin
<jl@glen--canyon.com> wrote in <tipofjdtie76lbtd7lc2ger5uo7sglq3p5@4ax.com>:
https://www.dropbox.com/scl/fo/s6wfz2xtdyd6tv32tq3fp/AET6J4oF84HG2hJMeST6F-E?rlkey=acyvuv4z0h2kg0x97azbed8uo&dl=0
Cannot make out much from those x-rays, pictures are better... >>>>>>>>you can probably see the traces just like that?
The x-rays are fun, but are admittedly more useful for an opaque >>>>>>> potted module or an IC or discrete semi. I can prety well trace the >>>>>>> Silvertel without them.
I have a gigantic scary Carribean guy who does the xrays and I wanted >>>>>>> an excuse for taking him to lunch, which turned into an interesting >>>>>>> hike around The Bernal Cut. He trashed the xray system software, and >>>>>>> had to rebuild it, and now it can do movies, which is great.
I'd like to have some products that can be powered by PoE or a wart, >>>>>>> and may want to put two 24-volt PoE supplies in series to get 48, so I >>>>>>> need to understand how they work. The xrays just help a bit.
If Ag9900 just works then why would you care how?
Can I overpower it with a wart? Does that need another diode?
Maybe. See other discussion in this thread.
Can I run two 24v Silvertels in series to get 48?
I don't see why not since the data sheet says isolated.
It shouldn't be hard to verify that.
Batteries are isolated, but a series string can destroy one cell by
back-biasing it.
Some power supplies will latch up, or not start up, in series with
others. Lots of suplies won't start (and may fail) if their input is
pulled negative.
As the number of items in a design increases, the probability of some
stupid error approaches unity. It's usually time efficient to be super
careful, as opposed to spinning a few PCB revs.
Why do you need 48V ?
To drive loads! To sell more power supplies!
It ocurred to me that if I use two Silvertels with outputs in series,
their inputs have to be in parallel. They will probably confuse one
another negotiating with the PoE switch.
So I guess customers need to have a 48v wart if they want 42 volt
outputs.
On Wed, 2 Oct 2024 22:54:59 -0400, "Edward Rawde"
<invalid@invalid.invalid> wrote:
"john larkin" <JL@gct.com> wrote in message news:tvvrfj57ufu4n1c5uq4hnpmjd9hhr0rukl@4ax.com...
On Wed, 2 Oct 2024 19:02:33 -0400, "Edward Rawde"
<invalid@invalid.invalid> wrote:
"john larkin" <jl@glen--canyon.com> wrote in message news:kgirfj1614cfkvknad7dl2igqcb2qi5tq7@4ax.com...
On Wed, 2 Oct 2024 17:00:52 -0400, "Edward Rawde"
<invalid@invalid.invalid> wrote:
"john larkin" <jl@glen--canyon.com> wrote in message news:kqbrfjhrd5oto8ud8vm0395p6oo8eipige@4ax.com...
On Wed, 2 Oct 2024 11:46:21 -0400, "Edward Rawde"
<invalid@invalid.invalid> wrote:
"john larkin" <JL@gct.com> wrote in message news:v6mqfjd93ib6q8j7d7ontsaouidieh5b2u@4ax.com...
On Wed, 02 Oct 2024 06:22:43 GMT, Jan Panteltje <alien@comet.invalid> >>>>>>>>> wrote:
On a sunny day (Tue, 01 Oct 2024 14:16:09 -0700) it happened john larkin
<jl@glen--canyon.com> wrote in <tipofjdtie76lbtd7lc2ger5uo7sglq3p5@4ax.com>:
https://www.dropbox.com/scl/fo/s6wfz2xtdyd6tv32tq3fp/AET6J4oF84HG2hJMeST6F-E?rlkey=acyvuv4z0h2kg0x97azbed8uo&dl=0
Cannot make out much from those x-rays, pictures are better... >>>>>>>>>>you can probably see the traces just like that?
The x-rays are fun, but are admittedly more useful for an opaque >>>>>>>>> potted module or an IC or discrete semi. I can prety well trace the >>>>>>>>> Silvertel without them.
I have a gigantic scary Carribean guy who does the xrays and I wanted >>>>>>>>> an excuse for taking him to lunch, which turned into an interesting >>>>>>>>> hike around The Bernal Cut. He trashed the xray system software, and >>>>>>>>> had to rebuild it, and now it can do movies, which is great. >>>>>>>>>
I'd like to have some products that can be powered by PoE or a wart, >>>>>>>>> and may want to put two 24-volt PoE supplies in series to get 48, so I
need to understand how they work. The xrays just help a bit.
If Ag9900 just works then why would you care how?
Can I overpower it with a wart? Does that need another diode?
Maybe. See other discussion in this thread.
Can I run two 24v Silvertels in series to get 48?
I don't see why not since the data sheet says isolated.
It shouldn't be hard to verify that.
Batteries are isolated, but a series string can destroy one cell by
back-biasing it.
Some power supplies will latch up, or not start up, in series with
others. Lots of suplies won't start (and may fail) if their input is >>>>> pulled negative.
As the number of items in a design increases, the probability of some >>>>> stupid error approaches unity. It's usually time efficient to be super >>>>> careful, as opposed to spinning a few PCB revs.
Why do you need 48V ?
To drive loads! To sell more power supplies!
If that's the spec then good luck.
The spec is anything I want it to be. We are considering
posssibilities and will have a hard schematic in a couple of weeks.
Some confusion is beneficial in early design stages.
It ocurred to me that if I use two Silvertels with outputs in series,
their inputs have to be in parallel. They will probably confuse one
another negotiating with the PoE switch.
Each one would have to be connected to an independent PoE switch port.
You're not thinking of connecting two of them to the same port are you?
The box will only have one RJ45.
You are very snarky.
I'd consider not using the Silvertel things at all but it may come down to economics rather than electronics.
They are under $10, not worth the engineering to save a few dollars.
Even with a heap of engineering, it would be hard to beat $10.
Time to market is worth a lot too.
So I guess customers need to have a 48v wart if they want 42 volt
outputs.
42? Is that a typo?
No.
42 is a resonable upper limit spec, given all the tolerances and
losses and range of loads.
I want to get to at least, say, 38ish to simulate aircraft DC power,
which is in theory 32 max.
"john larkin" <JL@gct.com> wrote in message news:tvvrfj57ufu4n1c5uq4hnpmjd9hhr0rukl@4ax.com...
On Wed, 2 Oct 2024 19:02:33 -0400, "Edward Rawde"
<invalid@invalid.invalid> wrote:
"john larkin" <jl@glen--canyon.com> wrote in message news:kgirfj1614cfkvknad7dl2igqcb2qi5tq7@4ax.com...
On Wed, 2 Oct 2024 17:00:52 -0400, "Edward Rawde"
<invalid@invalid.invalid> wrote:
"john larkin" <jl@glen--canyon.com> wrote in message news:kqbrfjhrd5oto8ud8vm0395p6oo8eipige@4ax.com...
On Wed, 2 Oct 2024 11:46:21 -0400, "Edward Rawde"
<invalid@invalid.invalid> wrote:
"john larkin" <JL@gct.com> wrote in message news:v6mqfjd93ib6q8j7d7ontsaouidieh5b2u@4ax.com...
On Wed, 02 Oct 2024 06:22:43 GMT, Jan Panteltje <alien@comet.invalid> >>>>>>>> wrote:
On a sunny day (Tue, 01 Oct 2024 14:16:09 -0700) it happened john larkin
<jl@glen--canyon.com> wrote in <tipofjdtie76lbtd7lc2ger5uo7sglq3p5@4ax.com>:
https://www.dropbox.com/scl/fo/s6wfz2xtdyd6tv32tq3fp/AET6J4oF84HG2hJMeST6F-E?rlkey=acyvuv4z0h2kg0x97azbed8uo&dl=0
Cannot make out much from those x-rays, pictures are better... >>>>>>>>>you can probably see the traces just like that?
The x-rays are fun, but are admittedly more useful for an opaque >>>>>>>> potted module or an IC or discrete semi. I can prety well trace the >>>>>>>> Silvertel without them.
I have a gigantic scary Carribean guy who does the xrays and I wanted >>>>>>>> an excuse for taking him to lunch, which turned into an interesting >>>>>>>> hike around The Bernal Cut. He trashed the xray system software, and >>>>>>>> had to rebuild it, and now it can do movies, which is great.
I'd like to have some products that can be powered by PoE or a wart, >>>>>>>> and may want to put two 24-volt PoE supplies in series to get 48, so I >>>>>>>> need to understand how they work. The xrays just help a bit.
If Ag9900 just works then why would you care how?
Can I overpower it with a wart? Does that need another diode?
Maybe. See other discussion in this thread.
Can I run two 24v Silvertels in series to get 48?
I don't see why not since the data sheet says isolated.
It shouldn't be hard to verify that.
Batteries are isolated, but a series string can destroy one cell by
back-biasing it.
Some power supplies will latch up, or not start up, in series with
others. Lots of suplies won't start (and may fail) if their input is
pulled negative.
As the number of items in a design increases, the probability of some
stupid error approaches unity. It's usually time efficient to be super >>>> careful, as opposed to spinning a few PCB revs.
Why do you need 48V ?
To drive loads! To sell more power supplies!
If that's the spec then good luck.
It ocurred to me that if I use two Silvertels with outputs in series,
their inputs have to be in parallel. They will probably confuse one
another negotiating with the PoE switch.
Each one would have to be connected to an independent PoE switch port.
You're not thinking of connecting two of them to the same port are you?
I'd consider not using the Silvertel things at all but it may come down to economics rather than electronics.
So I guess customers need to have a 48v wart if they want 42 volt
outputs.
42? Is that a typo?
On Wed, 02 Oct 2024 15:50:31 GMT, Jan Panteltje <alien@comet.invalid>
wrote:
On a sunny day (Wed, 02 Oct 2024 07:45:04 -0700) it happened john larkin >><JL@gct.com> wrote in <v6mqfjd93ib6q8j7d7ontsaouidieh5b2u@4ax.com>:
On Wed, 02 Oct 2024 06:22:43 GMT, Jan Panteltje <alien@comet.invalid> >>>wrote:
On a sunny day (Tue, 01 Oct 2024 14:16:09 -0700) it happened john larkin >>>><jl@glen--canyon.com> wrote in <tipofjdtie76lbtd7lc2ger5uo7sglq3p5@4ax.com>:
https://www.dropbox.com/scl/fo/s6wfz2xtdyd6tv32tq3fp/AET6J4oF84HG2hJMeST6F-E?rlkey=acyvuv4z0h2kg0x97azbed8uo&dl=0
Cannot make out much from those x-rays, pictures are better...
you can probably see the traces just like that?
The x-rays are fun, but are admittedly more useful for an opaque
potted module or an IC or discrete semi. I can prety well trace the >>>Silvertel without them.
I have a gigantic scary Carribean guy who does the xrays and I wanted
an excuse for taking him to lunch, which turned into an interesting
hike around The Bernal Cut. He trashed the xray system software, and
had to rebuild it, and now it can do movies, which is great.
I'd like to have some products that can be powered by PoE or a wart,
and may want to put two 24-volt PoE supplies in series to get 48, so I >>>need to understand how they work. The xrays just help a bit.
(When burials were outlawed in San Francisco, a railroad was
constructed to Colma for all the dead bodies and headstones. That
forced the Bernal Cut to be dug with people and mules. Colma now has
more dead people than live ones. Some parts of San Francisco are paved >>>with old headstones that nobody wanted to pay to ship. >>>https://www.bernalcut.org/ )
Found it with google maps...
Do you make Xray movies of living things?
I guess we could. All sorts of objects.
I'd like to do one of my hands, which I think has a foreign object
inside, but the machine is too heavily interlocked.
I had an uncle who got a foot xray for arthritis and they saw a small
nail inside his toe. He had no idea how it got there.
On Wed, 2 Oct 2024 17:00:52 -0400, "Edward Rawde"
<invalid@invalid.invalid> wrote:
"john larkin" <jl@glen--canyon.com> wrote in message news:kqbrfjhrd5oto8ud8vm0395p6oo8eipige@4ax.com...
On Wed, 2 Oct 2024 11:46:21 -0400, "Edward Rawde"
<invalid@invalid.invalid> wrote:
"john larkin" <JL@gct.com> wrote in message news:v6mqfjd93ib6q8j7d7ontsaouidieh5b2u@4ax.com...
On Wed, 02 Oct 2024 06:22:43 GMT, Jan Panteltje <alien@comet.invalid> >>>>> wrote:
On a sunny day (Tue, 01 Oct 2024 14:16:09 -0700) it happened john larkin >>>>>><jl@glen--canyon.com> wrote in <tipofjdtie76lbtd7lc2ger5uo7sglq3p5@4ax.com>:
https://www.dropbox.com/scl/fo/s6wfz2xtdyd6tv32tq3fp/AET6J4oF84HG2hJMeST6F-E?rlkey=acyvuv4z0h2kg0x97azbed8uo&dl=0
Cannot make out much from those x-rays, pictures are better...
you can probably see the traces just like that?
The x-rays are fun, but are admittedly more useful for an opaque
potted module or an IC or discrete semi. I can prety well trace the
Silvertel without them.
I have a gigantic scary Carribean guy who does the xrays and I wanted >>>>> an excuse for taking him to lunch, which turned into an interesting
hike around The Bernal Cut. He trashed the xray system software, and >>>>> had to rebuild it, and now it can do movies, which is great.
I'd like to have some products that can be powered by PoE or a wart, >>>>> and may want to put two 24-volt PoE supplies in series to get 48, so I >>>>> need to understand how they work. The xrays just help a bit.
If Ag9900 just works then why would you care how?
Can I overpower it with a wart? Does that need another diode?
Maybe. See other discussion in this thread.
Can I run two 24v Silvertels in series to get 48?
I don't see why not since the data sheet says isolated.
It shouldn't be hard to verify that.
Batteries are isolated, but a series string can destroy one cell by >back-biasing it.
Some power supplies will latch up, or not start up, in series with
others. Lots of suplies won't start (and may fail) if their input is
pulled negative.
As the number of items in a design increases, the probability of some
stupid error approaches unity. It's usually time efficient to be super >careful, as opposed to spinning a few PCB revs.
On Wed, 2 Oct 2024 22:54:59 -0400, "Edward Rawde"
<invalid@invalid.invalid> wrote:
"john larkin" <JL@gct.com> wrote in message news:tvvrfj57ufu4n1c5uq4hnpmjd9hhr0rukl@4ax.com...
On Wed, 2 Oct 2024 19:02:33 -0400, "Edward Rawde"
<invalid@invalid.invalid> wrote:
"john larkin" <jl@glen--canyon.com> wrote in message news:kgirfj1614cfkvknad7dl2igqcb2qi5tq7@4ax.com...
On Wed, 2 Oct 2024 17:00:52 -0400, "Edward Rawde"
<invalid@invalid.invalid> wrote:
"john larkin" <jl@glen--canyon.com> wrote in message news:kqbrfjhrd5oto8ud8vm0395p6oo8eipige@4ax.com...
On Wed, 2 Oct 2024 11:46:21 -0400, "Edward Rawde"
<invalid@invalid.invalid> wrote:
"john larkin" <JL@gct.com> wrote in message news:v6mqfjd93ib6q8j7d7ontsaouidieh5b2u@4ax.com...
On Wed, 02 Oct 2024 06:22:43 GMT, Jan Panteltje <alien@comet.invalid> >>>>>>>>> wrote:
On a sunny day (Tue, 01 Oct 2024 14:16:09 -0700) it happened john larkin
<jl@glen--canyon.com> wrote in <tipofjdtie76lbtd7lc2ger5uo7sglq3p5@4ax.com>:
https://www.dropbox.com/scl/fo/s6wfz2xtdyd6tv32tq3fp/AET6J4oF84HG2hJMeST6F-E?rlkey=acyvuv4z0h2kg0x97azbed8uo&dl=0
Cannot make out much from those x-rays, pictures are better... >>>>>>>>>> you can probably see the traces just like that?
The x-rays are fun, but are admittedly more useful for an opaque >>>>>>>>> potted module or an IC or discrete semi. I can prety well trace the >>>>>>>>> Silvertel without them.
I have a gigantic scary Carribean guy who does the xrays and I wanted >>>>>>>>> an excuse for taking him to lunch, which turned into an interesting >>>>>>>>> hike around The Bernal Cut. He trashed the xray system software, and >>>>>>>>> had to rebuild it, and now it can do movies, which is great. >>>>>>>>>
I'd like to have some products that can be powered by PoE or a wart, >>>>>>>>> and may want to put two 24-volt PoE supplies in series to get 48, so I
need to understand how they work. The xrays just help a bit.
If Ag9900 just works then why would you care how?
Can I overpower it with a wart? Does that need another diode?
Maybe. See other discussion in this thread.
Can I run two 24v Silvertels in series to get 48?
I don't see why not since the data sheet says isolated.
It shouldn't be hard to verify that.
Batteries are isolated, but a series string can destroy one cell by
back-biasing it.
Some power supplies will latch up, or not start up, in series with
others. Lots of suplies won't start (and may fail) if their input is >>>>> pulled negative.
As the number of items in a design increases, the probability of some >>>>> stupid error approaches unity. It's usually time efficient to be super >>>>> careful, as opposed to spinning a few PCB revs.
Why do you need 48V ?
To drive loads! To sell more power supplies!
If that's the spec then good luck.
The spec is anything I want it to be. We are considering
posssibilities and will have a hard schematic in a couple of weeks.
Some confusion is beneficial in early design stages.
I had an uncle who got a foot xray for arthritis and they saw a small
nail inside his toe. He had no idea how it got there.
john larkin <jl@glen--canyon.com> wrote:
[...]
I had an uncle who got a foot xray for arthritis and they saw a small
nail inside his toe. He had no idea how it got there.
Most people have toenails. :-)
On a sunny day (Wed, 02 Oct 2024 15:39:31 -0700) it happened john larkin ><jl@glen--canyon.com> wrote in <kgirfj1614cfkvknad7dl2igqcb2qi5tq7@4ax.com>:
On Wed, 2 Oct 2024 17:00:52 -0400, "Edward Rawde"
<invalid@invalid.invalid> wrote:
"john larkin" <jl@glen--canyon.com> wrote in message news:kqbrfjhrd5oto8ud8vm0395p6oo8eipige@4ax.com...
On Wed, 2 Oct 2024 11:46:21 -0400, "Edward Rawde"
<invalid@invalid.invalid> wrote:
"john larkin" <JL@gct.com> wrote in message news:v6mqfjd93ib6q8j7d7ontsaouidieh5b2u@4ax.com...
On Wed, 02 Oct 2024 06:22:43 GMT, Jan Panteltje <alien@comet.invalid> >>>>>> wrote:
On a sunny day (Tue, 01 Oct 2024 14:16:09 -0700) it happened john larkin >>>>>>><jl@glen--canyon.com> wrote in <tipofjdtie76lbtd7lc2ger5uo7sglq3p5@4ax.com>:
https://www.dropbox.com/scl/fo/s6wfz2xtdyd6tv32tq3fp/AET6J4oF84HG2hJMeST6F-E?rlkey=acyvuv4z0h2kg0x97azbed8uo&dl=0
Cannot make out much from those x-rays, pictures are better... >>>>>>>you can probably see the traces just like that?
The x-rays are fun, but are admittedly more useful for an opaque
potted module or an IC or discrete semi. I can prety well trace the >>>>>> Silvertel without them.
I have a gigantic scary Carribean guy who does the xrays and I wanted >>>>>> an excuse for taking him to lunch, which turned into an interesting >>>>>> hike around The Bernal Cut. He trashed the xray system software, and >>>>>> had to rebuild it, and now it can do movies, which is great.
I'd like to have some products that can be powered by PoE or a wart, >>>>>> and may want to put two 24-volt PoE supplies in series to get 48, so I >>>>>> need to understand how they work. The xrays just help a bit.
If Ag9900 just works then why would you care how?
Can I overpower it with a wart? Does that need another diode?
Maybe. See other discussion in this thread.
Can I run two 24v Silvertels in series to get 48?
I don't see why not since the data sheet says isolated.
It shouldn't be hard to verify that.
Batteries are isolated, but a series string can destroy one cell by >>back-biasing it.
Some power supplies will latch up, or not start up, in series with
others. Lots of suplies won't start (and may fail) if their input is
pulled negative.
As the number of items in a design increases, the probability of some >>stupid error approaches unity. It's usually time efficient to be super >>careful, as opposed to spinning a few PCB revs.
Why always some XXXchip?
What's wrong with designing with normal components and adding a known micro?
"john larkin" <JL@gct.com> wrote in message news:1f2sfj9tgq6016t52f9hdr22cr8kcq98tv@4ax.com...
On Wed, 2 Oct 2024 22:54:59 -0400, "Edward Rawde"
<invalid@invalid.invalid> wrote:
"john larkin" <JL@gct.com> wrote in message news:tvvrfj57ufu4n1c5uq4hnpmjd9hhr0rukl@4ax.com...
On Wed, 2 Oct 2024 19:02:33 -0400, "Edward Rawde"
<invalid@invalid.invalid> wrote:
"john larkin" <jl@glen--canyon.com> wrote in message news:kgirfj1614cfkvknad7dl2igqcb2qi5tq7@4ax.com...
On Wed, 2 Oct 2024 17:00:52 -0400, "Edward Rawde"
<invalid@invalid.invalid> wrote:
"john larkin" <jl@glen--canyon.com> wrote in message news:kqbrfjhrd5oto8ud8vm0395p6oo8eipige@4ax.com...
On Wed, 2 Oct 2024 11:46:21 -0400, "Edward Rawde"
<invalid@invalid.invalid> wrote:
"john larkin" <JL@gct.com> wrote in message news:v6mqfjd93ib6q8j7d7ontsaouidieh5b2u@4ax.com...
On Wed, 02 Oct 2024 06:22:43 GMT, Jan Panteltje <alien@comet.invalid>If Ag9900 just works then why would you care how?
wrote:
On a sunny day (Tue, 01 Oct 2024 14:16:09 -0700) it happened john larkin
<jl@glen--canyon.com> wrote in <tipofjdtie76lbtd7lc2ger5uo7sglq3p5@4ax.com>:
https://www.dropbox.com/scl/fo/s6wfz2xtdyd6tv32tq3fp/AET6J4oF84HG2hJMeST6F-E?rlkey=acyvuv4z0h2kg0x97azbed8uo&dl=0
Cannot make out much from those x-rays, pictures are better... >>>>>>>>>>>you can probably see the traces just like that?
The x-rays are fun, but are admittedly more useful for an opaque >>>>>>>>>> potted module or an IC or discrete semi. I can prety well trace the >>>>>>>>>> Silvertel without them.
I have a gigantic scary Carribean guy who does the xrays and I wanted
an excuse for taking him to lunch, which turned into an interesting >>>>>>>>>> hike around The Bernal Cut. He trashed the xray system software, and >>>>>>>>>> had to rebuild it, and now it can do movies, which is great. >>>>>>>>>>
I'd like to have some products that can be powered by PoE or a wart, >>>>>>>>>> and may want to put two 24-volt PoE supplies in series to get 48, so I
need to understand how they work. The xrays just help a bit. >>>>>>>>>
Can I overpower it with a wart? Does that need another diode?
Maybe. See other discussion in this thread.
Can I run two 24v Silvertels in series to get 48?
I don't see why not since the data sheet says isolated.
It shouldn't be hard to verify that.
Batteries are isolated, but a series string can destroy one cell by >>>>>> back-biasing it.
Some power supplies will latch up, or not start up, in series with >>>>>> others. Lots of suplies won't start (and may fail) if their input is >>>>>> pulled negative.
As the number of items in a design increases, the probability of some >>>>>> stupid error approaches unity. It's usually time efficient to be super >>>>>> careful, as opposed to spinning a few PCB revs.
Why do you need 48V ?
To drive loads! To sell more power supplies!
If that's the spec then good luck.
The spec is anything I want it to be. We are considering
posssibilities and will have a hard schematic in a couple of weeks.
Some confusion is beneficial in early design stages.
It ocurred to me that if I use two Silvertels with outputs in series,
their inputs have to be in parallel. They will probably confuse one
another negotiating with the PoE switch.
Each one would have to be connected to an independent PoE switch port.
You're not thinking of connecting two of them to the same port are you?
The box will only have one RJ45.
You are very snarky.
Didn't someone else mention that word here recently?
Actually I'm just trying to figure out what you're trying to do with PoE.
Ag7100 will turn 24V into isolated 48V
but I don't see why you would want to use PoE to power equipment needing 48V.
On Wed, 2 Oct 2024 23:52:38 -0400, "Edward Rawde"...
<invalid@invalid.invalid> wrote:
"john larkin" <JL@gct.com> wrote in message news:1f2sfj9tgq6016t52f9hdr22cr8kcq98tv@4ax.com...
On Wed, 2 Oct 2024 22:54:59 -0400, "Edward Rawde"
<invalid@invalid.invalid> wrote:
"john larkin" <JL@gct.com> wrote in message news:tvvrfj57ufu4n1c5uq4hnpmjd9hhr0rukl@4ax.com...
On Wed, 2 Oct 2024 19:02:33 -0400, "Edward Rawde"
<invalid@invalid.invalid> wrote:
"john larkin" <jl@glen--canyon.com> wrote in message news:kgirfj1614cfkvknad7dl2igqcb2qi5tq7@4ax.com...
On Wed, 2 Oct 2024 17:00:52 -0400, "Edward Rawde"
<invalid@invalid.invalid> wrote:
"john larkin" <jl@glen--canyon.com> wrote in message news:kqbrfjhrd5oto8ud8vm0395p6oo8eipige@4ax.com...
On Wed, 2 Oct 2024 11:46:21 -0400, "Edward Rawde"
<invalid@invalid.invalid> wrote:
"john larkin" <JL@gct.com> wrote in message news:v6mqfjd93ib6q8j7d7ontsaouidieh5b2u@4ax.com...
On Wed, 02 Oct 2024 06:22:43 GMT, Jan Panteltje <alien@comet.invalid>
wrote:
On a sunny day (Tue, 01 Oct 2024 14:16:09 -0700) it happened john larkin
<jl@glen--canyon.com> wrote in <tipofjdtie76lbtd7lc2ger5uo7sglq3p5@4ax.com>:
https://www.dropbox.com/scl/fo/s6wfz2xtdyd6tv32tq3fp/AET6J4oF84HG2hJMeST6F-E?rlkey=acyvuv4z0h2kg0x97azbed8uo&dl=0
Actually I'm just trying to figure out what you're trying to do with PoE.
Create a product line of aerospace instrumentation, small boxes that
can be placed right next to loads or motors or sensors and need only a
cat5 cable for power and computer interface.
The current practice is to put a PXIe or VME crate in a rack and
interface it to a computer (maybe $10K) and then buy modules and then
design and buy fabulously expensive custom cables out to the field.
Tha cables can cost more than the things that they connect. And rack
space is often very valuable.
The power supply module is just the test bed for the first box in the
family. Most modules would only need a few watts, but this one allows
some thermal characterization too.
We're about to go public with the concept. Wanna see the intro?
Ag7100 will turn 24V into isolated 48V
That's not a PoE pickoff. I guess we could get 24 volts from PoE and
boost that up to 48, maybe with some different brick, but the hassle
and cost accumulate.
If a user needs more than 20 volts output or so,
they may have to buy a 48v wart. Higher voltage warts are common
nowadays.
but I don't see why you would want to use PoE to power equipment needing 48V.
Customers might appreciate it and buy some.
"john larkin" <JL@gct.com> wrote in message news:8setfj16rrdda2uhegqfs50d8au0s53ho6@4ax.com...
On Wed, 2 Oct 2024 23:52:38 -0400, "Edward Rawde"...
<invalid@invalid.invalid> wrote:
"john larkin" <JL@gct.com> wrote in message news:1f2sfj9tgq6016t52f9hdr22cr8kcq98tv@4ax.com...
On Wed, 2 Oct 2024 22:54:59 -0400, "Edward Rawde"
<invalid@invalid.invalid> wrote:
"john larkin" <JL@gct.com> wrote in message news:tvvrfj57ufu4n1c5uq4hnpmjd9hhr0rukl@4ax.com...
On Wed, 2 Oct 2024 19:02:33 -0400, "Edward Rawde"
<invalid@invalid.invalid> wrote:
"john larkin" <jl@glen--canyon.com> wrote in message news:kgirfj1614cfkvknad7dl2igqcb2qi5tq7@4ax.com...
On Wed, 2 Oct 2024 17:00:52 -0400, "Edward Rawde"
<invalid@invalid.invalid> wrote:
"john larkin" <jl@glen--canyon.com> wrote in message news:kqbrfjhrd5oto8ud8vm0395p6oo8eipige@4ax.com...
On Wed, 2 Oct 2024 11:46:21 -0400, "Edward Rawde"
<invalid@invalid.invalid> wrote:
"john larkin" <JL@gct.com> wrote in message news:v6mqfjd93ib6q8j7d7ontsaouidieh5b2u@4ax.com...
On Wed, 02 Oct 2024 06:22:43 GMT, Jan Panteltje <alien@comet.invalid>
wrote:
On a sunny day (Tue, 01 Oct 2024 14:16:09 -0700) it happened john larkin
<jl@glen--canyon.com> wrote in <tipofjdtie76lbtd7lc2ger5uo7sglq3p5@4ax.com>:
https://www.dropbox.com/scl/fo/s6wfz2xtdyd6tv32tq3fp/AET6J4oF84HG2hJMeST6F-E?rlkey=acyvuv4z0h2kg0x97azbed8uo&dl=0
Actually I'm just trying to figure out what you're trying to do with PoE.
Create a product line of aerospace instrumentation, small boxes that
can be placed right next to loads or motors or sensors and need only a
cat5 cable for power and computer interface.
The current practice is to put a PXIe or VME crate in a rack and
interface it to a computer (maybe $10K) and then buy modules and then
design and buy fabulously expensive custom cables out to the field.
Tha cables can cost more than the things that they connect. And rack
space is often very valuable.
USB4 is likely to become the only wired interface needed on most future devices for short distance communication.
Almost 250W power capability too if you believe this page: >https://en.wikipedia.org/wiki/USB4
But other sources say up to 100W.
You'll still need an RJ45 connector and maybe optional wart connector of course.
And anything else a specialist application needs.
The power supply module is just the test bed for the first box in the
family. Most modules would only need a few watts, but this one allows
some thermal characterization too.
We're about to go public with the concept. Wanna see the intro?
You mean you've uploaded it but haven't posted the dropbox link yet?
On Thu, 3 Oct 2024 13:07:30 -0400, "Edward Rawde"
<invalid@invalid.invalid> wrote:
"john larkin" <JL@gct.com> wrote in message news:8setfj16rrdda2uhegqfs50d8au0s53ho6@4ax.com...
On Wed, 2 Oct 2024 23:52:38 -0400, "Edward Rawde"...
<invalid@invalid.invalid> wrote:
"john larkin" <JL@gct.com> wrote in message news:1f2sfj9tgq6016t52f9hdr22cr8kcq98tv@4ax.com...
On Wed, 2 Oct 2024 22:54:59 -0400, "Edward Rawde"
<invalid@invalid.invalid> wrote:
"john larkin" <JL@gct.com> wrote in message news:tvvrfj57ufu4n1c5uq4hnpmjd9hhr0rukl@4ax.com...
On Wed, 2 Oct 2024 19:02:33 -0400, "Edward Rawde"
<invalid@invalid.invalid> wrote:
"john larkin" <jl@glen--canyon.com> wrote in message news:kgirfj1614cfkvknad7dl2igqcb2qi5tq7@4ax.com...
On Wed, 2 Oct 2024 17:00:52 -0400, "Edward Rawde"
<invalid@invalid.invalid> wrote:
"john larkin" <jl@glen--canyon.com> wrote in message news:kqbrfjhrd5oto8ud8vm0395p6oo8eipige@4ax.com...
On Wed, 2 Oct 2024 11:46:21 -0400, "Edward Rawde"
<invalid@invalid.invalid> wrote:
"john larkin" <JL@gct.com> wrote in message news:v6mqfjd93ib6q8j7d7ontsaouidieh5b2u@4ax.com...
On Wed, 02 Oct 2024 06:22:43 GMT, Jan Panteltje <alien@comet.invalid>
wrote:
On a sunny day (Tue, 01 Oct 2024 14:16:09 -0700) it happened john larkin
<jl@glen--canyon.com> wrote in <tipofjdtie76lbtd7lc2ger5uo7sglq3p5@4ax.com>:
https://www.dropbox.com/scl/fo/s6wfz2xtdyd6tv32tq3fp/AET6J4oF84HG2hJMeST6F-E?rlkey=acyvuv4z0h2kg0x97azbed8uo&dl=0
Actually I'm just trying to figure out what you're trying to do with PoE. >>>Create a product line of aerospace instrumentation, small boxes that
can be placed right next to loads or motors or sensors and need only a
cat5 cable for power and computer interface.
The current practice is to put a PXIe or VME crate in a rack and
interface it to a computer (maybe $10K) and then buy modules and then
design and buy fabulously expensive custom cables out to the field.
Tha cables can cost more than the things that they connect. And rack
space is often very valuable.
USB4 is likely to become the only wired interface needed on most future devices for short distance communication.
Almost 250W power capability too if you believe this page: >>https://en.wikipedia.org/wiki/USB4
But other sources say up to 100W.
You'll still need an RJ45 connector and maybe optional wart connector of course.
And anything else a specialist application needs.
The power supply module is just the test bed for the first box in the
family. Most modules would only need a few watts, but this one allows
some thermal characterization too.
We're about to go public with the concept. Wanna see the intro?
You mean you've uploaded it but haven't posted the dropbox link yet?
I'll take that for "no".
On Thu, 3 Oct 2024 13:07:30 -0400, "Edward Rawde"
<invalid@invalid.invalid> wrote:
"john larkin" <JL@gct.com> wrote in message news:8setfj16rrdda2uhegqfs50d8au0s53ho6@4ax.com...
On Wed, 2 Oct 2024 23:52:38 -0400, "Edward Rawde"...
<invalid@invalid.invalid> wrote:
"john larkin" <JL@gct.com> wrote in message news:1f2sfj9tgq6016t52f9hdr22cr8kcq98tv@4ax.com...
On Wed, 2 Oct 2024 22:54:59 -0400, "Edward Rawde"
<invalid@invalid.invalid> wrote:
"john larkin" <JL@gct.com> wrote in message news:tvvrfj57ufu4n1c5uq4hnpmjd9hhr0rukl@4ax.com...
On Wed, 2 Oct 2024 19:02:33 -0400, "Edward Rawde"
<invalid@invalid.invalid> wrote:
"john larkin" <jl@glen--canyon.com> wrote in message news:kgirfj1614cfkvknad7dl2igqcb2qi5tq7@4ax.com...
On Wed, 2 Oct 2024 17:00:52 -0400, "Edward Rawde"
<invalid@invalid.invalid> wrote:
"john larkin" <jl@glen--canyon.com> wrote in message news:kqbrfjhrd5oto8ud8vm0395p6oo8eipige@4ax.com...
On Wed, 2 Oct 2024 11:46:21 -0400, "Edward Rawde"
<invalid@invalid.invalid> wrote:
"john larkin" <JL@gct.com> wrote in message news:v6mqfjd93ib6q8j7d7ontsaouidieh5b2u@4ax.com...
On Wed, 02 Oct 2024 06:22:43 GMT, Jan Panteltje <alien@comet.invalid>
wrote:
On a sunny day (Tue, 01 Oct 2024 14:16:09 -0700) it happened john larkin
<jl@glen--canyon.com> wrote in <tipofjdtie76lbtd7lc2ger5uo7sglq3p5@4ax.com>:
https://www.dropbox.com/scl/fo/s6wfz2xtdyd6tv32tq3fp/AET6J4oF84HG2hJMeST6F-E?rlkey=acyvuv4z0h2kg0x97azbed8uo&dl=0
Actually I'm just trying to figure out what you're trying to do with PoE. >>>Create a product line of aerospace instrumentation, small boxes that
can be placed right next to loads or motors or sensors and need only a
cat5 cable for power and computer interface.
The current practice is to put a PXIe or VME crate in a rack and
interface it to a computer (maybe $10K) and then buy modules and then
design and buy fabulously expensive custom cables out to the field.
Tha cables can cost more than the things that they connect. And rack
space is often very valuable.
USB4 is likely to become the only wired interface needed on most future devices for short distance communication.
Almost 250W power capability too if you believe this page: >>https://en.wikipedia.org/wiki/USB4
But other sources say up to 100W.
You'll still need an RJ45 connector and maybe optional wart connector of course.
And anything else a specialist application needs.
The power supply module is just the test bed for the first box in the
family. Most modules would only need a few watts, but this one allows
some thermal characterization too.
We're about to go public with the concept. Wanna see the intro?
You mean you've uploaded it but haven't posted the dropbox link yet?
I'll take that for "no".
On Thu, 03 Oct 2024 06:38:41 GMT, Jan Panteltje <alien@comet.invalid>
wrote:
On a sunny day (Wed, 02 Oct 2024 15:39:31 -0700) it happened john larkin
<jl@glen--canyon.com> wrote in <kgirfj1614cfkvknad7dl2igqcb2qi5tq7@4ax.com>: >>
On Wed, 2 Oct 2024 17:00:52 -0400, "Edward Rawde"
<invalid@invalid.invalid> wrote:
"john larkin" <jl@glen--canyon.com> wrote in message
news:kqbrfjhrd5oto8ud8vm0395p6oo8eipige@4ax.com...
On Wed, 2 Oct 2024 11:46:21 -0400, "Edward Rawde"
<invalid@invalid.invalid> wrote:
"john larkin" <JL@gct.com> wrote in message
news:v6mqfjd93ib6q8j7d7ontsaouidieh5b2u@4ax.com...
On Wed, 02 Oct 2024 06:22:43 GMT, Jan Panteltje <alien@comet.invalid> >>>>>>> wrote:
On a sunny day (Tue, 01 Oct 2024 14:16:09 -0700) it happened john larkin
<jl@glen--canyon.com> wrote in <tipofjdtie76lbtd7lc2ger5uo7sglq3p5@4ax.com>:
https://www.dropbox.com/scl/fo/s6wfz2xtdyd6tv32tq3fp/AET6J4oF84HG2hJMeST6F-E?rlkey=acyvuv4z0h2kg0x97azbed8uo&dl=0
Cannot make out much from those x-rays, pictures are better... >>>>>>>> you can probably see the traces just like that?
The x-rays are fun, but are admittedly more useful for an opaque >>>>>>> potted module or an IC or discrete semi. I can prety well trace the >>>>>>> Silvertel without them.
I have a gigantic scary Carribean guy who does the xrays and I wanted >>>>>>> an excuse for taking him to lunch, which turned into an interesting >>>>>>> hike around The Bernal Cut. He trashed the xray system software, and >>>>>>> had to rebuild it, and now it can do movies, which is great.
I'd like to have some products that can be powered by PoE or a wart, >>>>>>> and may want to put two 24-volt PoE supplies in series to get 48, so I >>>>>>> need to understand how they work. The xrays just help a bit.
If Ag9900 just works then why would you care how?
Can I overpower it with a wart? Does that need another diode?
Maybe. See other discussion in this thread.
Can I run two 24v Silvertels in series to get 48?
I don't see why not since the data sheet says isolated.
It shouldn't be hard to verify that.
Batteries are isolated, but a series string can destroy one cell by
back-biasing it.
Some power supplies will latch up, or not start up, in series with
others. Lots of suplies won't start (and may fail) if their input is
pulled negative.
As the number of items in a design increases, the probability of some
stupid error approaches unity. It's usually time efficient to be super
careful, as opposed to spinning a few PCB revs.
Why always some XXXchip?
What's wrong with designing with normal components and adding a known micro?
That's exactly what I'm doing. Stock parts and an RP2040 CPU chip.
There are *so many* Raspberry Pi kids out there!
Now if I could build the hardware part of the product with Legos...
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