Spehro Pefhany wrote: > > With due respect, Marcel, I have to disagree. I won't argue with the two resistor split rail as far as "works all the time" goes. My experience with R-R amps is undoubtedly lacking here too. I'll keep your advice in mind and see what happens in the future with those devices the next chance I get. LM324's? No problem! Newer stuff is, well, newer stuff! -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist