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The proto board will be lights and switches, and it connects via headers to a SparkFun ESP32 Thing. It turns out there’s just enough space between for a vape battery. I’ll design a case for it, but that’s a ways off yet.

I realized during planning that the 10 position bar graph display has the same 0.1 inch pitch as dupont headers, so that will be an indicator for signals on that port. You could show levels, activity, protocol detection, etc. I’m pretty pleased with that.

The fun part is this is a junk build. It’s all stuff I had lying around (… okay the LED modules I bought very recently more or less for this project but they’re lying around *now*).