Quantity   Component name
1 × Raspberry PI I'm using a the original one, but any of the credit-card size ones should work.
3 × 5mm Infrared Transmitter I got mine from Jaycar: <a target="_blank" rel="noopener noreferrer" href="https://www.jaycar.com.au/5mm-infrared-transmitting-led/p/ZD1945">https://www.jaycar.com.au/5mm-infrared-transmitting-led/p/ZD1945</a>
1 × RPM7100 5mm Infrared Receiver Also from Jaycar: <a target="_blank" rel="noopener noreferrer" href="https://www.jaycar.com.au/5mm-infrared-receiver/p/ZD1952">https://www.jaycar.com.au/5mm-infrared-receiver/p/ZD1952</a>
1 × 56 Ohm Resistor
1 × 1k Ohm Resistor
1 × 39k Ohm Resistor
1 × BC547 Discrete Semiconductors / Transistors, MOSFETs, FETs, IGBTs
1 × 2.5mm PCB mount power socket Jaycar again: <a target="_blank" rel="noopener noreferrer" href="https://www.jaycar.com.au/2-5mm-pc-mount-male-dc-power-connector/p/PS0520">https://www.jaycar.com.au/2-5mm-pc-mount-male-dc-power-connector/p/PS0520</a>