I tried doing that with a red LED once. Appropriately current-limited. I th= ink I pushed it to 50volts DC? The LED developed a black spot in the interi= or, although when forward-based it would still light with reduced brightnes= s.=20 -------- Paul Anderson -- VE3HOP On 2012-08-27, at 2:22 PM, Neil wrote: > What about the max reverse voltage rating on these LED's? IIRC those=20 > are in the order of a few volts (or under 10 volts) so wouldn't the LED=20 > go bye-bye? >=20 > Cheers, > -Neil. >=20 >=20 > On 8/27/2012 1:55 PM, alan smith wrote: >> Friend has me thinking about this...if you take 110VAC and half wave re= ctify it, your going to end up with around 150VDC peak, so with the correct= resistor(7k-8K) it should drive a standard LED OK? Guess I've never reall= y thought about driving it directly from AC. Yes..I know, its non-isolated= so its at the AC potential and a shock hazard. Without a capacitor, you w= ill see flicker on it as well of course. >>=20 >>=20 >=20 > --=20 > http://www.piclist.com PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .