On Wed, Mar 9, 2011 at 9:18 AM, Olin Lathrop wr= ote: > N. T. wrote: >>> In any case, high pass filtering would take care of the problem. >> >> Waving a dead fish under the right phase of the Moon would help >> better :-) 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". > > Good idea, let's see how we'd do that. =A0We'd need something that blocke= d DC > but let other stuff thru. =A0Of course we have to block some things close= to > DC, since otherwise we'd have to wait forever for the signal to stabalize= .. > Ooh, ooh, I know. =A0We want one of them there low frequency blocking > thingies. =A0I think the fancy name is "filter". =A0Let's use that so oth= ers > think we're more smarterer. =A0"Low frequency blocking filter" is kindof > cumbersome to say, so let's flip it around and call it a "high frequency > pass-thru filter". =A0That's still kindof a mouthful. =A0How about "high > frequency pass filter", or maybe even just "high pass filter". =A0Oh righ= t, > that's what I said in the first place. =A0Gee, who'd have thought!? > > Clearly, he needs to get four op-amps and build this circuit: http://electronicdesign.com/article/analog-and-mixed-signal/simple-ac-stop-= dc-pass-circuit-uses-four-op-amps61.aspx (I've posted this before; reposting because I think it's hilarious.) --=20 Mark Rages, Engineer Midwest Telecine LLC markrages@midwesttelecine.com --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .