V G wrote: > I mean, for some reason, with the electrodes not connected to anything, I > see a steady DC signal of 2V or so for some reason. > -- Are you talking about "Figure 8. Nerve Impulse Amplifier" of 1168fa.pdf (LT1168 datasheet)? Most probably, as for me, the negative feedback loop is not working. --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .