Quantity   Component name
1 × Apple Extended Keyboard First generation ADB version, this is the version with a non-flat power key
1 × Teensy LC
1 × Generic 4-port USB hub The specific one I used had for ports on the same side and is relatively long and slim
105 × Signal diode Any signal diode that is suitable for use in the key matrix
3 × BC547 or equivalent NPN transistor (e.g. 2n3904) For the LED driver circuits
3 × 220-240 ohm resistor I used a 240 ohm resistor, but 220 would also work
3 × 1k resistor
1 × USB-B socket Upstream socket to connect to the computer
1 × Dual USB-A socket Downstream sockets to connect to any peripherals
1 × USB micro-B plug and cable Salvaged from a USB-A to USB micro-B cable
1 × Unterminated USB cable Salvaged from the original USB keyboard's cord
1 × Breadboard hookup wire I used several packets from Jaycar