In circuits I sometimes see capacitors over each of the fout diodes in a diode bridge. What is the prurpose and effect of these capacitors? I recently tried to help a client get rid of some interference problem and these capacitors turned out to do a good job. But I would like to know exactly (if possible) why? Wouter van Ooijen -- ------------------------------------------- Van Ooijen Technische Informatica: www.voti.nl consultancy, development, PICmicro products docent Hogeschool van Utrecht: www.voti.nl/hvu -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist