On the electronics and interfacing side of things, [John] utilises the Arduino pro micro for its copious analog inputs and USB functionality. A nice feature of this board is that it’s based on ...

Captures and replays signals on a PS/2 interface (DATA and CLOCK lines). A "capture" is a sequence of GPIO readings taken at short intervals, effectively logging the entire timeline of PS/2 pin states ...

42+2 encoders - 44 key/ 54 + 2 encoders - 56 key keyboard utilizing MX or Gateron low profile and maybe Kailh Choc soon ...