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Why fiberglass faceplates for Frac-Rac

2007-03-18 by Grant Richter

I don't know if anyone remembers the "crop circles" keyboard that Don Buchla made.

From the one picture I have seen of it, it looks like it was designed for quradraphonic 
panning. It was arranged in a circle with 4 quadrants of "woven" traces. It looked like each 
quadrant produced a voltage, and the 4 voltages were routed to 4 VCAs. So you could pan by 
running you finger in a circle around the quadrants.

There is an example of where the faceplate would have to be made of PC material, to support 
the capacitive sensing traces.

The Freescale parts have a 2.5 millisecond settling time per contact, that is too slow for a 
black and white type keyboard, but probably fine for a "crop circle" type controller.

It would be sorta cool to have something like that in a Frac-Rac module.

I don't have plans to do that any time soon, just daydreaming.

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