Quantity   Component name
1 × Raspberry Pi computer 3B+ recommended
1 × microSD card (at least 8GB) for RPi firmware+software
1 × HD44780 16x2 character LCD
1 × 1k resistor
1 × 10k trim potentiometer for setting LCD contrast
2 × Momentary pushbuttons SPST
1 × 2x20 female header for RPi connection
1 × 16-pin male header strip for LCD
1 × PCM5102 DAC (optional) can use Pi onboard audio
1 × Hammond 1590BB enclosure
8 × nylon M2.5 screws and hex standoffs
1 × perfboard single-sided
1 × hook-up wire 26 AWG ribbon cable
2 × 1/4" TRS audio jacks
1 × DC barrel jack