Spherical trackball
prusaprinters
This is a functional one-button USB trackball shaped like a sphere. It does not sit on a desk, you have to hold it in your hand.It was made using:a 57.2mm billiard ballPMW3360 optical sensorthe PCB from here: https://github.com/jfedor2/rp2040-pmw3360Omron D2FC mouse button switch (or any other switch with the same footprint)this PCB for mounting the switch: https://github.com/jfedor2/mouse-switch-mount-pcb2.5mm zirconium oxide (or silicon nitride) bearing ballsM2x4 screws for mounting the button and the switch PCBM3x4 screws for mounting the main PCB3x10mm wood screws for assembling the caseThe top part needs supports, the others don't.
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