So what makes ours unique? Joystick control!
Classic joysticks have two pots inside (variable resistors,) one for up and down, one for left and right. I made these control the APC circuit. Not only does this joystick have trim controls so you can tune the note you hear in the center, but the added switches change the range in tuned musical steps. This is an APC ready to play along with a band!
If this has been done before, I haven't found any with such capabilities. But in an effort to be open source I would like to guide you though what it took to build it, that you may possibly expand upon it and break further ground, and the whole human race can noisily benefit.
Behold: The Joey-Stick® by Wozn of Rooftop Ridicule
Step 1: Find the Joystick
Get creative and gut the analog stick from an old game controller like a PS1 or a Game Cube. Same deal inside. I once found a great joystick that stuck out the front of the radio on an '88 Chrysler LeBaron.
Step 2: Test the Circuit With Your Joystick
Step 3: Build It in There
I swear I planned this out before I built it, but I also wanted to challenge myself to use what I had and avoid buying new parts, I'm a fan of the charm of scavenged things. The upper box is from some military RF thing. All the wiring is point-to-point on perf-board, kinda like an old tube amp.
Step 4: Join a Band
This has been Wozn from the band Rooftop Ridicule. Here's a video of our song Head Rest with the intrepid Jon Martino playing the Joey Stick® as we call it. We often hand it off to someone in the audience to play for part of the song too.
and yes I did put blinking lights in my guitar.