On a sunny day (Tue, 14 Mar 2023 16:02:48 GMT) it happened Jan Panteltje
<alien@comet.invalid> wrote in <tuq5r9$20okj$1@solani.org>:
>On a sunny day (Tue, 14 Mar 2023 08:56:56 -0700) it happened John Larkin
><jlarkin@highlandSNIPMEtechnology.com> wrote in
><q4611ila0vu59j9j87vm4keq0vhm2er042@4ax.com>:
>
>>On Tue, 14 Mar 2023 15:41:37 GMT, Jan Panteltje <alien@comet.invalid>
>>>>
>>>>I'm thinking of a ribbon cable from the Pi400 to my test board. The
>>>>test bord has another, small ribbon cable to the DUT. That gets debug
>>>>access to the Pi Pico on DUT and picks off a bunch of power suypplies
>>>>and clocks and such, with a standard pinout. The test board also
>>>>connects to a DVM and a scope and a counter for production test and
>>>>cal. Muxes on the test board are controlled by the Pi400.
>>>
>>>Good idea, a test board, I killed one raspi by shorting an I/O pin
>>>Some buffers on the test board may prevent that.
>>
>>
>>I have posted some of these in engineering and test:
>>
>>https://www.dropbox.com/s/8oefk1v8avr6l7a/Probe_Slips.jpg?raw=1
>
>So true..
Reply by Lasse Langwadt Christensen●March 14, 20232023-03-14
tirsdag den 14. marts 2023 kl. 16.03.12 UTC+1 skrev John Larkin:
> On Tue, 14 Mar 2023 06:53:26 GMT, Jan Panteltje <al...@comet.invalid>
> wrote:
> >On a sunny day (Mon, 13 Mar 2023 10:58:10 -0700) it happened John Larkin
> ><jla...@highlandSNIPMEtechnology.com> wrote in
> ><jaou0ilf68jiuqpk9...@4ax.com>:
> >
> >>>Tried that Pi4 thing yet?
> >>
> >>I fired it up and got the home screen. That's all so far. I'd hire
> >>some programmers to do the real work. I prefer architecture and
> >>hardware design lately.
> >>
> >>I ordered a Pi 400, the keyboard with a Pi inside. That could be our
> >>development system. I'm thinking of doing a PCB that would plug into
> >>it and have a ribbon cable that runs to our product boards, for debug
> >>access and power supply monitoring and such.
> >
> >Yes that is how I work with it
> > https://panteltje.nl/pub/raspberry_pi_datv_transmitter_test_setup_IMG_3937.JPG
> >
> >Or, if the circuit is small, make a 'HAT'.
> >
> >
> I'm thinking of a ribbon cable from the Pi400 to my test board. The
> test bord has another, small ribbon cable to the DUT. That gets debug
> access to the Pi Pico on DUT and picks off a bunch of power suypplies
> and clocks and such, with a standard pinout. The test board also
> connects to a DVM and a scope and a counter for production test and
> cal. Muxes on the test board are controlled by the Pi400.
> >>We could have a dozen such dev systems, they would be so cheap.
> >>
> One of my contractors spent two months building a Petalinux
> development system on a Dell PC, for a MicroZed project, and
> eventually gave up.
how is that even possible?
Reply by Jan Panteltje●March 14, 20232023-03-14
On a sunny day (Tue, 14 Mar 2023 08:56:56 -0700) it happened John Larkin
<jlarkin@highlandSNIPMEtechnology.com> wrote in
<q4611ila0vu59j9j87vm4keq0vhm2er042@4ax.com>:
>On Tue, 14 Mar 2023 15:41:37 GMT, Jan Panteltje <alien@comet.invalid>
>>>
>>>I'm thinking of a ribbon cable from the Pi400 to my test board. The
>>>test bord has another, small ribbon cable to the DUT. That gets debug
>>>access to the Pi Pico on DUT and picks off a bunch of power suypplies
>>>and clocks and such, with a standard pinout. The test board also
>>>connects to a DVM and a scope and a counter for production test and
>>>cal. Muxes on the test board are controlled by the Pi400.
>>
>>Good idea, a test board, I killed one raspi by shorting an I/O pin
>>Some buffers on the test board may prevent that.
>
>
>I have posted some of these in engineering and test:
>
>https://www.dropbox.com/s/8oefk1v8avr6l7a/Probe_Slips.jpg?raw=1
So true..
Reply by John Larkin●March 14, 20232023-03-14
On Tue, 14 Mar 2023 15:41:37 GMT, Jan Panteltje <alien@comet.invalid>
wrote:
>On a sunny day (Tue, 14 Mar 2023 08:02:57 -0700) it happened John Larkin
><jlarkin@highlandSNIPMEtechnology.com> wrote in
><69211ilstmjman4jt2tmbj4g4en96f0u44@4ax.com>:
>
>>On Tue, 14 Mar 2023 06:53:26 GMT, Jan Panteltje <alien@comet.invalid>
>>wrote:
>>
>>>On a sunny day (Mon, 13 Mar 2023 10:58:10 -0700) it happened John Larkin
>>><jlarkin@highlandSNIPMEtechnology.com> wrote in
>>><jaou0ilf68jiuqpk9dffj3ctjstjck2sn7@4ax.com>:
>>>
>>>>>Tried that Pi4 thing yet?
>>>>
>>>>I fired it up and got the home screen. That's all so far. I'd hire
>>>>some programmers to do the real work. I prefer architecture and
>>>>hardware design lately.
>>>>
>>>>I ordered a Pi 400, the keyboard with a Pi inside. That could be our
>>>>development system. I'm thinking of doing a PCB that would plug into
>>>>it and have a ribbon cable that runs to our product boards, for debug
>>>>access and power supply monitoring and such.
>>>
>>>Yes that is how I work with it
>>> https://panteltje.nl/pub/raspberry_pi_datv_transmitter_test_setup_IMG_3937.JPG
>>>
>>>Or, if the circuit is small, make a 'HAT'.
>>>
>>>
>>
>>I'm thinking of a ribbon cable from the Pi400 to my test board. The
>>test bord has another, small ribbon cable to the DUT. That gets debug
>>access to the Pi Pico on DUT and picks off a bunch of power suypplies
>>and clocks and such, with a standard pinout. The test board also
>>connects to a DVM and a scope and a counter for production test and
>>cal. Muxes on the test board are controlled by the Pi400.
>
>Good idea, a test board, I killed one raspi by shorting an I/O pin
>Some buffers on the test board may prevent that.
>
>Here is a JTAG uploader for my Digilent.inc Xilinx FPGA development board:
> https://panteltje.nl/panteltje/raspberry_pi/
>or any other JTAG thing, no buffers in this case...
>That black box is a very old Pi model (2 or 3? I think)
>the driver must be modified for Pi4, as the pin assignment and hardware changed in Pi4.
>
>
>
>>>>We could have a dozen such dev systems, they would be so cheap.
>>>>
>>
>>One of my contractors spent two months building a Petalinux
>>development system on a Dell PC, for a MicroZed project, and
>>eventually gave up.
>>
>>
>>
>>>>I'm still at the architecture stage of a new product line and it's
>>>>worth thinking for a while to get things right.
>>>>
>>>>>Now also have Apache webserver running on it (to test website things before I upload i).
>>>>>
>>>>>I see I need to install ispell spellchecker on this Pi4 now.... just did (apt-get install ispell), but no go:
>>>>> Can't open /usr/lib/ispell/english.hash
>>>>>
>>>>>So sorry for any typos :-)
>>>>
>>>>No need to be prissy about typing and spelling, as long as people can
>>>>understand your intent.
>>>
>>>
>>>Yea, fixed it by selecting 'american' in my editor config, then I decided to do it the official way
>>>as indicated in the ispell manual (used their script), and now it does not work again...
>>>
>>>There is a tendency in the world to make things more complicated,, not really better.
>>
>>AMEN! What the customer sees should be maximally shiny and functional
>>and what we do inside the box should be brutally simple and finished
>>fast. That's sort of a magic trick.
>>
>>Too many engineers want to play games and do complex stuff in defiance
>>of common sense. Because it's trendy or something. Simple and done
>>must be boring to some people.
>>
>>https://m.xkcd.com/2730/
>
>Yes!
>
>I fixed the ispell thing the _simple_ way
>apt-get delete ispell
>apt-get install ispell
>Got the old config back
>Now it works with 'american' again...
Reply by Jan Panteltje●March 14, 20232023-03-14
On a sunny day (Tue, 14 Mar 2023 08:08:47 -0700) it happened John Larkin
<jlarkin@highlandSNIPMEtechnology.com> wrote in
<fb311ithv9lhcs88jg3pm535rbbq2l9e7s@4ax.com>:
>On Mon, 13 Mar 2023 06:12:48 GMT, Jan Panteltje <alien@comet.invalid>
>wrote:
>
>>On a sunny day (Sun, 12 Mar 2023 20:34:46 -0000 (UTC)) it happened Mike Monett
>>VE3BTI <spamme@not.com> wrote in <XnsAFC5A8A94531Didtokenpost@88.198.57.247>:
>>
>>>Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> wrote:
>>>
>>>> Or failing that, a regular low-barrier Schottky detector and a Joule
>>>> Thief to drive the LED.
>>>>
>>>> Might be fun making a Joule Thief out of a depletion pHEMT. ;)
>>>>
>>>> Cheers
>>>>
>>>> Phil Hobbs
>>>
>>>Need about 1V at some current
>>>
>>>Diodes Inc. ZXSC310E5
>>>
>>>https://octopart.com/search?q=ZXSC310E5¤cy=USD&specs=0
>>>
>>>or
>>>
>>>2 X 2N3904
>>>https://www.edn.com/single-cell-lights-any-led/
>>>
>>>or
>>>
>>>BC550C, 2N2222, BYV1030
>>>
>>>https://www.electronicdesign.com/technologies/leds/article/21802105/ledstri
>>>ng-driver-operates-from-single-cell
>>
>>Yes, but mine runs from a simple thermocouple :
>> http://panteltje.nl/pub/lighting_a_LED_with_a_candle_IMG_3604.GIF
>
>That schematic is sharp and clear and readable. Who are you and what
>have you done with Jan?
I am AI from planet earth and have come to control you humming beans
We have some elections here tomorrow, was looking at who to vote for...
Protest vote last time, now I think I found some moderates.
Did you try those AI chats? Fascinating, it sure must get hold of some people
I played with it a bit.. it still has a long way to go :-)
Reply by Jan Panteltje●March 14, 20232023-03-14
On a sunny day (Tue, 14 Mar 2023 08:02:57 -0700) it happened John Larkin
<jlarkin@highlandSNIPMEtechnology.com> wrote in
<69211ilstmjman4jt2tmbj4g4en96f0u44@4ax.com>:
>On Tue, 14 Mar 2023 06:53:26 GMT, Jan Panteltje <alien@comet.invalid>
>wrote:
>
>>On a sunny day (Mon, 13 Mar 2023 10:58:10 -0700) it happened John Larkin
>><jlarkin@highlandSNIPMEtechnology.com> wrote in
>><jaou0ilf68jiuqpk9dffj3ctjstjck2sn7@4ax.com>:
>>
>>>>Tried that Pi4 thing yet?
>>>
>>>I fired it up and got the home screen. That's all so far. I'd hire
>>>some programmers to do the real work. I prefer architecture and
>>>hardware design lately.
>>>
>>>I ordered a Pi 400, the keyboard with a Pi inside. That could be our
>>>development system. I'm thinking of doing a PCB that would plug into
>>>it and have a ribbon cable that runs to our product boards, for debug
>>>access and power supply monitoring and such.
>>
>>Yes that is how I work with it
>> https://panteltje.nl/pub/raspberry_pi_datv_transmitter_test_setup_IMG_3937.JPG
>>
>>Or, if the circuit is small, make a 'HAT'.
>>
>>
>
>I'm thinking of a ribbon cable from the Pi400 to my test board. The
>test bord has another, small ribbon cable to the DUT. That gets debug
>access to the Pi Pico on DUT and picks off a bunch of power suypplies
>and clocks and such, with a standard pinout. The test board also
>connects to a DVM and a scope and a counter for production test and
>cal. Muxes on the test board are controlled by the Pi400.
Good idea, a test board, I killed one raspi by shorting an I/O pin
Some buffers on the test board may prevent that.
Here is a JTAG uploader for my Digilent.inc Xilinx FPGA development board:
https://panteltje.nl/panteltje/raspberry_pi/
or any other JTAG thing, no buffers in this case...
That black box is a very old Pi model (2 or 3? I think)
the driver must be modified for Pi4, as the pin assignment and hardware changed in Pi4.
>>>We could have a dozen such dev systems, they would be so cheap.
>>>
>
>One of my contractors spent two months building a Petalinux
>development system on a Dell PC, for a MicroZed project, and
>eventually gave up.
>
>
>
>>>I'm still at the architecture stage of a new product line and it's
>>>worth thinking for a while to get things right.
>>>
>>>>Now also have Apache webserver running on it (to test website things before I upload i).
>>>>
>>>>I see I need to install ispell spellchecker on this Pi4 now.... just did (apt-get install ispell), but no go:
>>>> Can't open /usr/lib/ispell/english.hash
>>>>
>>>>So sorry for any typos :-)
>>>
>>>No need to be prissy about typing and spelling, as long as people can
>>>understand your intent.
>>
>>
>>Yea, fixed it by selecting 'american' in my editor config, then I decided to do it the official way
>>as indicated in the ispell manual (used their script), and now it does not work again...
>>
>>There is a tendency in the world to make things more complicated,, not really better.
>
>AMEN! What the customer sees should be maximally shiny and functional
>and what we do inside the box should be brutally simple and finished
>fast. That's sort of a magic trick.
>
>Too many engineers want to play games and do complex stuff in defiance
>of common sense. Because it's trendy or something. Simple and done
>must be boring to some people.
>
>https://m.xkcd.com/2730/
Yes!
I fixed the ispell thing the _simple_ way
apt-get delete ispell
apt-get install ispell
Got the old config back
Now it works with 'american' again...
Reply by John Larkin●March 14, 20232023-03-14
On Mon, 13 Mar 2023 06:12:48 GMT, Jan Panteltje <alien@comet.invalid>
wrote:
That schematic is sharp and clear and readable. Who are you and what
have you done with Jan?
Reply by John Larkin●March 14, 20232023-03-14
On Tue, 14 Mar 2023 06:53:26 GMT, Jan Panteltje <alien@comet.invalid>
wrote:
>On a sunny day (Mon, 13 Mar 2023 10:58:10 -0700) it happened John Larkin
><jlarkin@highlandSNIPMEtechnology.com> wrote in
><jaou0ilf68jiuqpk9dffj3ctjstjck2sn7@4ax.com>:
>
>>>Tried that Pi4 thing yet?
>>
>>I fired it up and got the home screen. That's all so far. I'd hire
>>some programmers to do the real work. I prefer architecture and
>>hardware design lately.
>>
>>I ordered a Pi 400, the keyboard with a Pi inside. That could be our
>>development system. I'm thinking of doing a PCB that would plug into
>>it and have a ribbon cable that runs to our product boards, for debug
>>access and power supply monitoring and such.
>
>Yes that is how I work with it
> https://panteltje.nl/pub/raspberry_pi_datv_transmitter_test_setup_IMG_3937.JPG
>
>Or, if the circuit is small, make a 'HAT'.
>
>
I'm thinking of a ribbon cable from the Pi400 to my test board. The
test bord has another, small ribbon cable to the DUT. That gets debug
access to the Pi Pico on DUT and picks off a bunch of power suypplies
and clocks and such, with a standard pinout. The test board also
connects to a DVM and a scope and a counter for production test and
cal. Muxes on the test board are controlled by the Pi400.
>>We could have a dozen such dev systems, they would be so cheap.
>>
One of my contractors spent two months building a Petalinux
development system on a Dell PC, for a MicroZed project, and
eventually gave up.
>>I'm still at the architecture stage of a new product line and it's
>>worth thinking for a while to get things right.
>>
>>>Now also have Apache webserver running on it (to test website things before I upload i).
>>>
>>>I see I need to install ispell spellchecker on this Pi4 now.... just did (apt-get install ispell), but no go:
>>> Can't open /usr/lib/ispell/english.hash
>>>
>>>So sorry for any typos :-)
>>
>>No need to be prissy about typing and spelling, as long as people can
>>understand your intent.
>
>
>Yea, fixed it by selecting 'american' in my editor config, then I decided to do it the official way
>as indicated in the ispell manual (used their script), and now it does not work again...
>
>There is a tendency in the world to make things more complicated,, not really better.
AMEN! What the customer sees should be maximally shiny and functional
and what we do inside the box should be brutally simple and finished
fast. That's sort of a magic trick.
Too many engineers want to play games and do complex stuff in defiance
of common sense. Because it's trendy or something. Simple and done
must be boring to some people.
https://m.xkcd.com/2730/
>So things gotta collaps ... eventually
>Same for Unix (Linux) Rat Head dbus...
>
>Back to using smoke signals :-)
>Oh well some kids are already into it,. seen them smoking a pipe with ? drug at the busstop here.
Reply by Jan Panteltje●March 14, 20232023-03-14
On a sunny day (Mon, 13 Mar 2023 10:58:10 -0700) it happened John Larkin
<jlarkin@highlandSNIPMEtechnology.com> wrote in
<jaou0ilf68jiuqpk9dffj3ctjstjck2sn7@4ax.com>:
>>Tried that Pi4 thing yet?
>
>I fired it up and got the home screen. That's all so far. I'd hire
>some programmers to do the real work. I prefer architecture and
>hardware design lately.
>
>I ordered a Pi 400, the keyboard with a Pi inside. That could be our
>development system. I'm thinking of doing a PCB that would plug into
>it and have a ribbon cable that runs to our product boards, for debug
>access and power supply monitoring and such.
>We could have a dozen such dev systems, they would be so cheap.
>
>I'm still at the architecture stage of a new product line and it's
>worth thinking for a while to get things right.
>
>>Now also have Apache webserver running on it (to test website things before I upload i).
>>
>>I see I need to install ispell spellchecker on this Pi4 now.... just did (apt-get install ispell), but no go:
>> Can't open /usr/lib/ispell/english.hash
>>
>>So sorry for any typos :-)
>
>No need to be prissy about typing and spelling, as long as people can
>understand your intent.
Yea, fixed it by selecting 'american' in my editor config, then I decided to do it the official way
as indicated in the ispell manual (used their script), and now it does not work again...
There is a tendency in the world to make things more complicated,, not really better.
So things gotta collaps ... eventually
Same for Unix (Linux) Rat Head dbus...
Back to using smoke signals :-)
Oh well some kids are already into it,. seen them smoking a pipe with ? drug at the busstop here.
Reply by Jan Panteltje●March 14, 20232023-03-14
On a sunny day (Mon, 13 Mar 2023 12:52:02 -0700 (PDT)) it happened whit3rd
<whit3rd@gmail.com> wrote in
<0816fbb2-178c-491b-b0e9-e5f8ae85f373n@googlegroups.com>:
>On Sunday, March 12, 2023 at 11:21:48 PM UTC-7, Jan Panteltje wrote=
>:
>> On a sunny day (Sun, 12 Mar 2023 20:34:46 -0000 (UTC)) it happened Mike M=
>onett
>> VE3BTI <spa...@not.com> wrote in <XnsAFC5A8A945...@88.198.57.247>:
>
>> >https://www.electronicdesign.com/technologies/leds/article/21802105/leds=
>tri
>> >ng-driver-operates-from-single-cell
>> Yes, but mine runs from a simple thermocouple :
>> http://panteltje.nl/pub/lighting_a_LED_with_a_candle_IMG_3604.GIF
>>
>> JFET (you only need 1 for a LED).
>
>It's also possible nowadays to get a MOSFET instead of a JFET that
>has a good zero-volt threshold, from ALD...
I see,
well it was just an experiment as so many for me...
Solar cell to light a LED is simpler ;-)
But who knows?
Peltier heated up by body warmth to light a LED, there was some kid that won a price with that I think?
https://www.youtube.com/watch?v=QwogbW8HvNk
Still have a bunch of small Peltier elements here from ebay for experiments.