PhobGCC is an open-source Gamecube controller motherboard aiming to make an accessible and consistent controller. The key feature is the use of hall effect sensors instead of potentiometers, which eliminates a wear item. Additonally, it features notch calibration, digital snapback filtering, button remapping, and various trigger configurations.
If you are interested in making one, join the project Discord to ask questions and get the most up to date information: https://discord.gg/eNJ7xWMvxf
You can find all documentation here: https://github.com/PhobGCC/PhobGCC-doc
Board version 1.2:
Hall effect sensors:
Initial prototypes: