Quantity   Component name
1 × NE555P Clock and Timer ICs / Timer ICs
2 × Signal diodes
1 × op482 Quad OP amp
1 × 100uf - 200uf Cap
1 × DRV8825 Stepper Motor Driver Module with Heat Sink
1 × NEMA 17
1 × Various resistors 330ohm, 100k
1 × 100k pot
2 × 3mm LED's
2 × itr20001/t reflective optical sensor