Don't you think a factor of 1 million in the capacitance would be obvious just by looking at the thing!? Imagine how big a 1F 50V capacitor would have to be and what it would look like. I would have expected such a thing, but the "real" 1F (2.5-5V) capacitors seem to be about the same size as a 1000uF/35V "normal aluminum electrolytic." Or smaller Very depressing, from a physics education point of view (how many of us heard "of course you could make a 1 Farad capacitor, but it would be HUGE - perhaps the size of a car" or somesuch. Sigh. Now you've got to start talking about surface areas of fractal solids and such.) Digikey's 1F capacitors are about 20mm diameter by 5mm, for instance. The "0.047F" caps are the ones that really surprise you, since that'd be a standard value in uF. They should'a picked a different "target" value (0.048F?) just to trick people into looking more closely... BillW -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu