Quantity   Component name
1 × DVD (preferrably blank) best to use a blank one, but really any DVD or even CD will do
1 × Arduino Nano
1 × EasyDriver board
1 × stepper motor use a motor with at least 200 steps/revolution
1 × photodiode here: Osram BPX65, but again any photodiode will do
1 × Op Amp here: LM358N, though any opamp will do
1 × Hall sensor (optional) from an old CD drive, found under the spindle motor
1 × various resistors, capacitors, etc
1 × tin foil
1 × pieces of scrap wood/plastic
1 × 3d printed mounts & holders
1 × Small magnet (optional)