Quantity   Component name
1 × ATSAMD21E18A-MU microcontroller
1 × AP2112K-3.3TRG1 low drop-out voltage regulator
2 × 1µF 0604 capacitor
1 × USB cable
40 × Kailh chocolate switch
40 × diode
5 × 1kΩ 0604 resistor
5 × 0604 LED