Quantity   Component name
1 × Arduino UNO
1 × Stepper motor (28BYJ-48)
1 × Geared DC motor
1 × H bridge (L298)
1 × LED ring (salvaged from a torch)
2 × 12mm button with a cap
1 × Hall effect sensor (E49)
1 × Magnet
4 × 10k Ohm resistor
1 × 560 Ohm resistor
1 × Scrap wood