Quantity   Component name
2 × Raspberry Pi 3
1 × Raspi Cam IR: RPi Camera (F), Supports Night Vision, Adjustable-Focus https://www.waveshare.com/product/rpi-camera-f.htm
2 × Alfa WLAN USB Cards + Antenna
1 × RPR220 Reflective Photosensor
1 × Trimmable Potentiometer 10kOhm
1 × Arduino as an ADC Arduino Micro (or any other)