Quantity   Component name
1 × 20" iMac G5 iSight computer with working LCD monitor Doesn't matter if the computer itself is working, as all those parts will be removed anyway
1 × HDMI Type A Female socket Breakout Board I used this one from ebay: https://ebay.us/DleTEJ I recommend paying the extra two dollars for soldering, as these are some incredibly small connections (you can solder the screw terminal blocks yourself)..
1 × External power switch To replace the computer's on/off button. Ideally this will be a shape that can be mounted in the same round hole where the power button is currently mounted.
1 × 5V One Channel Relay Module Relay Switch with OPTO Isolation and High/Low Level Trigger selection I recommend buying a version with larger holes for mounting with M3 hardware. Some have M2 holes that are difficult to work with. I used this version from Amazon: https://www.amazon.com/dp/B00LW15A4W/ref=cm_sw_r_tw_dp_U_x_GpJ4Eb2NQV825
1 × Assorted extra wires I used some from a salvaged ATX power supply. The most you'll be using them for is 12V.
1 × Assorted mounting hardware I used a kit of M3 spacers (white to match the iMac) and a few random screws I had sitting around for mounting to plastic without having to use a nut.
1 × Heat shrink tubing An assortment of small diameters
1 × Tools needed: multimeter, wire strippers, wire cutters, torx bits (T6, T8, T10), set of precision screwdrivers, soldering iron,