Quantity   Component name
1 × Duinotech RGB LED Circular Board From Jaycar. cat No: XC4385
1 × Arduino Nano
2 × resistor to use as pull down resistors
2 × 3.5mm SPST micro tactile switch Jaycar CAT No: SP0602. Almost any switch will do
1 × 10k ohm potentiometer (logarithmic) Just an old one I had laying around
5 × M3 bolt with nut. At least 20mm long.
1 × spring Not really necessary.