Quantity   Component name
2 × ATMEGA328P-PU Microprocessors, Microcontrollers, DSPs / ARM, RISC-Based Microcontrollers
6 × Push Button 6x6 + plastic knob
2 × Printed circuit boards (see GIthub link for files)
2 × Crystal oscillator 16Mhz
4 × Ceramic capacitor 22pF