Gaston Gagnon wrote: > Somehow related to the question of the OP: > In a PC are digital and frame grounds connected together and in turn > connected to AC main ground? Usually, yes. The power supply in your average PC grounds the chassis (to AC earth), and the chassis is also connected to low-side power ground. -- Hector Martin (hector@marcansoft.com) Public Key: http://www.marcansoft.com/marcan.asc -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist