Step 4: Testing
A note about usb cables, or any other cable, don't trust the colours, use a meter to find out which wire goes to each point on the plug, in my case the wires are not even the correct colours so it does not matter, but I have also had a keyboard that had wrong colours and wrong printing on the pcb!
Connecting the controller is tedious, the usb hardware is easy, either way its good to know it functions, cause after this its pretty much the point of no return
SO TEST IT
Take note that the cathode of the diode (the end with a stripe) needs to face into oncoming current, and the anode needs to be connected to ground
this is backwards from most diodes, what is happening here is the zener diode has a very low reverse breakdown point, so it "leaks" a controlled amount of current backwards through the diode to ground, which also drops our voltage down to the 3 ish volt signals expected by usb