Bill Kuncicky wrote : > 5. I have told you everything that I think is significant, > but of course Murphey's Law says that I have forgotten > to tell you something crucial. :-) Yep, right, you never know :-) One thing, doesn't one usualy uses both a smaller (say 100nF) ceramic cap on the output side of the 7805 (to prevent HF osccillation) at the same time as a larger (10-22 uF) elyt for smoothing ? I usualy do something like that, but it might also depend on the brand of the 7805. Jan-Erik. -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist