things to do with an ipod case... instead of throwing it away, i took some spare parts and built a new synth based on my monijonsyn2. the new synth has a push-button and one can now step through a few different programs. and the 2-way switch set different 'modes'. in this 1.0 version there is only 3 programs and 2 modes.
the programs basically just maps the 3 analog inputs differently, and the modes switches left/right output channels.
it's very cheap and easy to build. 2 aa-batteris provide power, the inputs are 3 touch points, 2 potentiometers, 1 button and a combined on/off/mode switch. all the sound generation (2 pwm pins) and program logic happens inside the 8bit avr mega8 chip and the code is easy to hack (see main.c in the zip below).
todo: add more fun programs to the firmware