Re: digital filter, to exclude noisy touch data?

Chris
Thanks; you're quite right – for discrete triggers [flatline] is ok, but less so for continuous data. Hmmm. I have a variety of caps here, from .01uF to .47uF, which I could try – despite much googling I can't find an example circuit. My circuit looks like this; do you know if the caps should be placed before or after the pulldown resistor on each read line?

Cheers
Brendan

[attachment=163606,2324]

Attachments:
  1. circuit.jpg
Jun 3, 2011 at 9:56am #205325