2 layers

FlightPanel-01
arn-c0de/ATMEGA-ButtonPanel
ATmega32U4 flight panel with 16-ch multiplexer, rotary encoder, and 19+ inputs.
29 parts12
KiCad boards from 1 GitHub repository tagged “button-box”, the most starred first; open any of them in PCBKit.

arn-c0de/ATMEGA-ButtonPanel
ATmega32U4 flight panel with 16-ch multiplexer, rotary encoder, and 19+ inputs.