Trackballs are great for CAD work, but completely unsuitable for gaming, people insist. I wouldn't be able to react quickly enough, and even if I could, that slippery ball wouldn't give me enough ...
Oct. 12/20: Code now availble, see extra pictures of finished Trackball box. Dec. 16/20: Added code for x-axis disable (Golf game driver - no hook/slice cheat). Dec. 16/20: Uploaded new code for ...
The trackball is powered by the Raspberry Pi Pico running QMK, features a high-accuracy PMW3360 sensor that can be found in commercial gaming mice, and uses a snooker ball for the business end.