The back button's recessed fit makes it hard to hit accidentally. Frets on Fire requires buttons for navigation, cancel, and strumming, so I added four small pushbuttons in the upper body of the guitar, a leaf micro switch for strumming, and a button where the volume dial was as a back button. I then tinned each of the 12 contacts on my controller board with solder.
To remove this I carefully scraped it off with a screwdriver, then once most of the contacts were exposed i used rubbing alcohol to clean off the remnants. The keypad controller i used has a black carbon coating on it's traces. The next thing you will need to do is prepare the parts for their new lives. These can be sourced from sites like digi-key or your local rat-shack. I also used some prototyping circuit board and a spool of very thin wire to keep things straight, you may be able to do without these depending on your skill level. a leaf switch will work well for the strum key. The game itself supports 5 fret keys, one (or two) strum key(s), escape, and 4 directional buttons. The amount of switches you will need may vary depending on your choice of guitar and if you want to navigate the game menus without a keyboard. We will be using the controller board in this to connect to the compuer. I prefer USB, and the smaller number of keys makes deciphering the buttons easier. I got a cheap USB numberpad while i was getting the guitar for about 12.99. Otherwise you will need to add buttons for fretting. Any kid's toy guitar will do, though one with fret buttons will make things easier and nicer looking. First, you need three parts to make a USB guitar for your PC.
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