>> Also, I measured the resistance of my tap water. The multimeter is >> showing anywhere between 2.5 - 5 million ohms. > It's actually a very low resistance, so yes it definitely would. =A0Howev= er, > 5mOhms is surely due to severe measurement error. In the circumstances we''ll believe that it was a typo, I'm sure. (For anyone else I'd ignore it, but [m ...M] is, after all, one of your specialist areas :-). ) R --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .