Quantity   Component name
1 × Raspberry Pi +/2/3/3+
64 × 5mm LEDs, red
37 × Diodes 4148
1 × UDN2981A or equivalent Interface and IO ICs / Peripheral Drivers and Actuators
30 × Custom made switches
16 × 390 Ohm resistors
2 × 1K Ohm Resistors
1 × 2*20 pin header for mounting the Raspberry Pi You need a specific extra-tall header available at Adafruit
2 × Encoder switch
1 × Key switch