Trackball 7

This is a USB trackball, made using:

• a 57.2mm billiard ball
• PMW3360 optical sensor
• the PCB from here: https://github.com/jfedor2/rp2040-pmw3360
• Kailh GM mouse button switches (or any other switch with the same footprint)
• this PCB for mounting the switches: https://github.com/jfedor2/mouse-switch-mount-pcb
• 2.5mm silicon nitride (or zirconium oxide) bearing balls
• M2x4, M3x4 screws for mounting the PCBs
• 3x10mm wood screws for assembling the case and buttons

Only the left button model is included, to print the other one use the mirror function in your slicer.

The models print without supports.