Re: Touch sensor

On Tue, 12 Feb 2008 11:11:19 +1300, Nicholas Sherlock wrote:
Phil Endecott wrote:
Nicholas Sherlock wrote:
However, the timing difference between these two states is not very
large.

Try looking for the 50/60Hz hum that the user injects when they touch
the pad.

Would the user be as good of an antenna for mains hum as the cables and
metal pad themselves, though?


Yeah, if you use two pads back-to-back (like double-sided board) and
a differential input.

Cheers!
Rich

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