I made this for gaming and wanted it about as small as possible. The first was hand wired. I designed a PCB and should have it made soon enough. I wired it up the same as the OLKB Preonic so it can be flashed using easy AVR as if it were a Preonic. Mine will have back lit font; I’m not messing with blank key caps.
The cardboard shows how the key matrix is wired to the Teensy.
vvv Original proof of concept. I modded this board to work with same teensy running same software.