Did you look here?
http://www.geofex.com/ampdbug/ampdebug.htm

steve wrote:And y'all are acting like we shouldn't care if somebody is a creep or chooses to associate with creeps. Granted that definition of "creep" is subjective.

Peter Sotos isn't creepy?
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The expression pedal needs to send voltage (about 5v) to the unit. The trackball would have to be able to be hooked up to a voltage source (a nine volt battery would work) and then control the voltage sent out to the pedal. This is only the case with voltage controlled units. You would have to ...

Its probably just a photo-resistor hooked up to a 555 timer chip. You can make something similar by building the Atari Punk Console and replacing the pots with photo-resistors. Or its a photo-diode. http://en.wikipedia.org/wiki/Photodiode


Zack

DrAwkward wrote:I can't vote on this poll until i figure out if they've ever played my band.

They did.
http://wfmu.org/artistbrowser.php?action=artist&artist=ifihadahifi&artist_id=41693