On 12/18/05, William Chops Westfield wrote: > > >> fuses are cheap and relatively small > > Fuses are HUGE, especially if you want to use common replaceable types. > get depressed every time I try to "harden" one of my PCB designs by > adding fuses... Fuses are really HUGE but I have to put it in for UL approval. ;-( Of couse big and samll are always relative to the board size. ;-) I was using three fuses for one EEx ia product (Intrinsic Safety product used in explosive environment) and the brand of the fuses to choose for Ex use was really limited for PTB approval. But it is of course necessary to put them in so that extra reliability/safety can be achieved. Regards, Xiaofan -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist