Thanks everyone! There's still a couple odds and ends to figure out - like how I actually want to manufacture the enclosure - but I'm pretty optimistic about getting a group buy out there at some point.
I assume that this means that you can play doom from the keyboard it's running on?
There's two ways to power the board: from the USB or from some pads on the top of the board. If you had a keyboard with a battery that was configured to be able to supply power via the USB cable, you could theoretically power the keycap
and play with the same keyboard, but I'm unaware of any keyboards that do that. Failing that, there's basically 3 ways to power it:
- Via a USB battery, which won't allow you to play
- Via a battery or power supply connected to the pads. If you're supplying 5V you can plug in the keyboard and play
- Via wires attached to the USB chord / receptacle of the keyboard and routed through the LED hole to the pads on the PCB
That last option is the most involved, but the keycap starts up when the board is plugged in, and the USB port is free. Since you're getting power from the keyboard itself, you can't plug the same board into the keycap, but you can plug a numpad or macropad or something similar. I have a board set up like that:
https://imgur.com/TDFLrRZ and I have what I call the "big chungus" version of the keycap permanently wired with a wall wart:
https://imgur.com/nXF8adl, which I also use to demo the speaker.