“A handheld emulation device based on raspberry pi, that has a removable controller and the controller has a arduboy it to play it on the go.
I followed mr.blinkys Arduboy homemade package standard wiring and wired an arduboy following these instructions and for each switch, I made a secondary connection that goes to the header pins, which in turn gets connected to RPI gpios when we want to use it as a controller to play games on RPI. also made a custom PCB out of protoboard.
Then downloaded a game from the arduboy game website. then uploaded to it using USB wire.”