Quantity   Component name
1 × Raspberry Pi 3B
1 × Adafruit LED Matrix HAT
2 × Adafruit 64x32 LED Matrix
1 × Sonolert
3 × DC-DC Adjustable Buck Converter
4 × Noctua NF-A4x20 PWM 12V Fan
1 × NOYITO PC817 4-Channel Optocoupler