Step 7Keyboard mapping
If you don't have a continuity tester (like me) i recommend building one since it will save you so much time through this part. First you should decide what keys you want and what switches and buttons on the gun they will control. then crack open a USB keyboard and you should find that there is just a small and simple looking circuit up in the top right corner which connects to two floppy sheets of circuit covered in buttons and wires. peel the two apart but be careful not to tare them. then once you've got these three parts look at what keys lay on top of these buttons and write it on the circuit with permanent marker for later reference (see picture FILL IN !!!!). then draw an illustration of the hard circuit board on a piece of paper (all pins included).
Mapping
you are probably going to want to get some calm music going cause this usually takes a while
i recommend Pink Floyd dark side of the moon. Start with the first flexible layer of circuit and use you continuity tester to find which key connected to what terminal on the board (confused? the pictures should help) then when found mark it down on your illustration of the hard circuit board. then do the second layer. you will by now have noticed that the layers are somewhat different criss crossing the circuit together but if you draw it down simply on your circuit map you should have no troubles.
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