Inside is Arduino Pro Micro and a PMW 3389 optical sensor on a breakout board. [Ben] was going to use flexible 3D printed panels as mouse buttons, but then had an epiphany — why not use keyboard ...

They were not intended to be normal Arduino I/Os, but were give some commands to turn them on and off, as described in this SparkFun tutorial (actually for the Arduino Pro Micro). They are: TXLED0; ...

Posted in Arduino Hacks Tagged arduino, arduino pro micro, cherry mx, controller, k-shoot mania, optical encoder, voltex New Micro YARH.IO Designed For Skilled Operators January 5, 2021 by Tom ...