A trackball
Parts:
- a 52.5mm snooker ball
- Three 8mm bearing ball rollers
- ADNS 9800 laser mouse sensor.
- Adafruit ItsyBitsy 32u4 3V
- Some capacitors and transistors for the board.
- Four Cherry MX keyboard switches as buttons.
- A 3D printed cradle
- And the PCB.
The schematics for the PCB are under board/ and were created in GEDA. The cradle was designed using OpenSCAD and is at cradle/mouse.scad. I think cradle/mouse3.stl is the file I had printed. And the code is under src and is based off the mouse example for the Teensy.
Under case/ is the beginnings of the design for a case, though I think the PCB needs some changes before this progresses much. Currently the case is a piece of 3mm acrylic with cutouts for the switches, then heated and bent into shape. In future I will move away from the keyboard keys to micro switches. Keys are not meant to be used like buttons on a mouse and pretending they are will cause pain. It does for me at least.