I may have missed that IoT deadline, but eye on the Prize - I'm targeting Best Product anyway.

Above is what I've got working so far.

I sent out for a second round of PCBs, Green/ENIG. I added a few creature comforts, but sorry to say I kept it safe and stayed with the LT1945 for high voltage generation. The TI all-in-ones still had a lot of parts and I'm not super confident I can solder unexposed leads.

Anyway, hopefully this one doesn't need a bodge and I'll be publishing it. Here are the differences:

• 10 Control signals (down from 10, I'm tying off RL and SHR, keeping the 3 voltage on/offs)
• 8 Data lines
• Switching to DPAKs on the 15V/-15V Regulators (nice to sit flat this time)
• Adding a resistor divider to one of the ADCs on the ESP32
  • (Even though it isn't going to be part of the final build, I might keep a few around with the '32 onboard)
• Switched some TH components to SMD
  

... and that's about it. Again, I'll publish it if I got it right this time - I don't want people to have to read all my entries to know not to build a version, haha.

And in the meantime I'll work on the second board: converting video inputs into something that can be displayed onePaper. From what I've seen, we can make this work - probably at 1.1 frames per second maximum, heh.