At 19.55 2012.08.27, you wrote: > Friend has me thinking about this...if you take 110VAC and half wave=20 >rectify it, your going to end up with around 150VDC peak, so with the=20 >correct resistor(7k-8K) it should drive a standard LED OK? Guess I've=20 >never really thought about driving it directly from AC. Yes..I know,=20 >its non-isolated so its at the AC potential and a shock hazard. =20 >Without a capacitor, you will see flicker on it as well of course. When I was a kid I made the exact same reasoning. Boom!! I learnt a new thing of the datasheets: the reverse breakdown voltage. As it nearly exploded in front of my eyes, I may have learnt more things too.. but fortunately I didn't and remained ignorant about those issues. *g= * Cheers, Mario --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .