This article on iPod clickwheel explains the principle of how capacitive sensing works. But how would I go about connecting one of these to Arduino?Should I simply abandon the idea? Thanks!
I had the idea that it might not be too much of a hassle to implement a scroll wheel with just an Arduino. You would only need one "send" pin and maybe four or five "receive" pins, all linked to the send pin with 1 M resistors. You would then send a "burst" (cycle of square waves) from the send pin, to each receive pin (in order). After reading each pin (see the reference) it would be flipped to an input with pinMode().
This is to be used as a "jogwheel" for an edit controller I'm building.
Does it have to be one of the Ipod wheels ?Couldn't you do the same with an ordinary rotary encoder, maybe with a large knob on it ?
If anyone's interested, I could write it up and convert it from AVR assembler to Arduino sketch code.