Quantity   Component name
1 × Microchip ATtiny9/10 MCU https://www.mouser.co.uk/ProductDetail/Microchip-Technology-Atmel/ATTINY9-TS8R?qs=sGAEpiMZZMvqv2n3s2xjsRLJ5ROJ0gc0Te0wtn3axF4%3d
1 × Chip LED 0805 Blue Ultra bright https://www.mouser.co.uk/ProductDetail/Dialight/599-0191-007F?qs=gTYE2QTfZfTbWzs5Ohdbbg%3d%3d
3 × Right angle SMT IR LED (fits 0805 landing) https://www.mouser.co.uk/ProductDetail/Kingbright/APA3010SF4C?qs=sGAEpiMZZMvAL21a%2fDhxMr5g2tX6Hxi%2fa4U8sEYjfjk%3d
3 × Phototransistor PTH 3mm https://www.mouser.co.uk/ProductDetail/Lite-On/LTR-4206E?qs=%2fha2pyFaduhhbCH4JaGr01IbZQRp%2fPBtQyIx%252b1JJ9gs%3d
2 × 10k Resistor 0603 https://www.mouser.co.uk/ProductDetail/Yageo/AC0603JR-0710KL?qs=sGAEpiMZZMvdGkrng054t4NLzK06rwOvVZJMqdd3%2fCA%3d
1 × 150R Resistor 0603 Selected for blink led used https://www.mouser.co.uk/ProductDetail/Yageo/RC0603JR-07150RL?qs=sGAEpiMZZMvdGkrng054t8Tx25L%252bvTaRiX12VFVHRU4%3d
1 × 120R Resistor 0603 Dropper resistor for IR emitters https://www.mouser.co.uk/ProductDetail/Yageo/RC0603JR-07120RL?qs=sGAEpiMZZMvdGkrng054t8Tx25L%252bvTaRqWgUBnQJHGY%3d
1 × Conductive thread or wire (for connecting individual units This is not part of the PCB design but will be used to connect the individual PCBs together
1 × Battery holder (for testing) https://www.mouser.co.uk/ProductDetail/Keystone-Electronics/2465CN?qs=sGAEpiMZZMvxqoKe%252bDjhrqmk0IZrw5u1moT%252bl%252b6fYKuIesqIoi0uTg%3d%3d