On Thu, Aug 25, 2005 at 12:48:41PM -0500, Mark Rages wrote: > > That's a clever method, but you should probably measure the 4700uF > cap's actual capacitance. (electrolytic caps can vary by a lot). Use > the same method, but substitute a high-value 1% resistor instead of > the test circuit. Solve for C instead of I. A very good idea Mark! The cap I'm using has a +-20% tolerance. Matthew -- "We do not embrace reason at the expense of emotion. We embrace it at the expense of self-deception." -- Herbert Muschamp -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist