Quantity   Component name
4 × Scateboard Bearings
1 × 12 Volt Motor (I used a salvaged motor from a cordless drill)
1 × Arduino Mini Pro
1 × IRF540 Discrete Semiconductors / Power Transistors and MOSFETs
1 × Optoislator
1 × LED Indicator
1 × Sewing Machine Belt / Large O Ring
1 × Platsil Castable Silicone
1 × 3D Printed Assembly
1 × 10K Pot