On 25-Jun-07 jim wrote: > Wouldn't a cap be a voltage source, not current? The charge stored within a capacitor gives rise to the voltage across it. If you put an external load on a charged capacitor the voltage will cause a current to flow in the load. The loss of stored charge causes the voltage to drop. Maybe you are thinking of constant current source rather than constant voltage source ? The capacitor is neiter of these of course ! Peter -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads