DA-2000 NUMITRON tubes not driven

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7 months 3 weeks ago #12340 by Ya
I would also like to specify that I flashed the wemos with "DA-2000 / IV-9 Firmware Update V6" esptool --chip auto -b 921600 -p / dev / ttyUSB0 write_flash --flash_mode dio --flash_size 4MB 0x0 Downloads / NUMITRON / DA2000-V6-6digit / DA2000-V6-6digit.bin

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7 months 3 weeks ago #12341 by Ian
that should not be a problem: The LEDs are working, so I expect the tubes must work as well.

Do you have a scope? We need to check the signals to the first 5916 in the chain. It is possible that there is a problem with one of the control traces.

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7 months 3 weeks ago #12350 by Ya
Unfortunately I do not have an oscilloscope

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7 months 3 weeks ago #12351 by Ya
Is it possible to test the tubes and drivers on a breadboard?

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7 months 3 weeks ago #12352 by Ian
Before we do that we can try a few things:

1) Move the driver chips around, so that the first one is somewhere else. It is possible that the first chip in the chain is faulty (I don't think this is likely). Take them out of the socket and move them.

2) Install the indicator LEDs - this will prove that the driver chip is working.

3) Make sure that these pins on the Wemos and the board are well soldered - the control the drivers:



4) Check that there is 5V at pin 2 of the tube socket



5) If that does not work I will send you a replacement tested Wemos (just in case)
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7 months 3 weeks ago #12353 by Ya
Ok I am testing this in the morning.
i have multiple wemos, i can try to change it

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