Quantity   Component name
1 × Fabricated PCB The Fritzing file can be found in the Gothub repo
1 × LED Fiber Optics / Emitters
1 × 150 ohm resistor
1 × IR receiver LED A TSOP4838 does nice
1 × ATTiny85 Microprocessors, Microcontrollers, DSPs / ARM, RISC-Based Microcontrollers
1 × USB-TTL converter
1 × Mac Development Kits, Boards and Systems / Intellectual Property Cores
1 × IR remote From any old device