On Wed, Mar 9, 2011 at 11:31 AM, Bob Blick wrote: > On Wed, 09 Mar 2011 16:31 +0200, "N. T." wrote: > > > If "leads were picking up a DC offset, probably due to galvanic > > action", the right approach, in my opinion, would be to eliminate > > "picking up a DC offset". > > I agree with that, too. If there is an unwanted signal, DC in this case, > in your circuit, get rid of it as soon as possible. If not before the > first stage, then right after. > > Yeah, I need to go to Home Depot and get some insulated wire. I'm using regular wire (twisted together) for (+), (-), and GND. I'll probably then go to the local hospital and get some "real" electrodes. A low frequency high pass filter after the first amplifier stage should wor= k well. --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .