three Button Rhythm Keyboard is a cheap and simple to produce input device for various rythm games, aiming to fill the niche of three button devices.
This is my first project both in KiCAD and in STM32Cube
Built around a STM32 “blue-pill”, it uses cheap commonly available parts and a 3D printed case. Initial designs had a STM32 chip and the auxilliary components placed directly on the board, but compared to just soldering a pre-made board, this just resulted in useless complexity, longer building times and surprisingly, higher costs per unit.
You can find more information, the code, the PCB files and the STL files on Github:
