"MouseSinth" in english, or as you wish!
If someone simply plug the sensors of the movement encoder of an old mouse to a speaker he/she will get a "Gestual square wave -_-_-_- synthesizer" so to say.
The faster you move the mouse, higher the pitch of the sound.
Here you have a Mp3 record I made of one of my Sintemouses.
Listen to it!
* 1 x Old ball encoder mouse (the ones that have a ball in a hole instead of a red light against the mousepad)
* Thin colored cables from inside the mouse usb cable, or from inside a parallel printer cable.
* 2 x phototransitors (the most common ones, that look like transparent leds) (PHT1 in the circuit drawing)
* 2 x Presets 500 KOhms (PST1,PST2)
* Some mono audio cable
* 1 x Audio Jack of the kind that fits you best :P
* 2 x 330 Ohms resistors
* 1 x 9V Battery or a switching DC converter of between 5 and 12 Volts.
A cheap (not switching) converter will imput 50hz noise into the audio signal. A 9V battery will be just fine.
Some cable stripping tool
Soldering iron & tin
Hot glue gun