Quantity   Component name
2 × NEMA14 Stepper Motor 0.9° - 400 steps/rev - 5V
1 × Arduino UNO
1 × Adafruit Motor Shield V2 for controlling the stepper motors
1 × HC-05 Bluetooth module for remote serial control
1 × Laser module
1 × HDD platter metalic opaque mirror
1 × BC547B NPN Transistor for laser blanking
1 × 5mm photodiode for laser position calibration
3 × 5mm LEDs LEDs for indication
1 × SPDT Switch
1 × DC Socket Panel Mount