Originally Posted by nklatt
There are currently two 12V flasher circuits posted there; the second (more recent) one is a bit simpler.
I use it for flashing 3-4W worth of LEDs, which can turn on and off quickly; if you use it for incandescents, you may want to slow the flashing down a bit (say, by increasing C1). I don't know if constant flashing will shorten bulb life, though.
If your lights pull enough, you may be able to just use an automotive (or motorcycle) flasher module, available for a few bucks from your local auto parts store. They come in "thermal" and "electrical"(?) flavors, with the electrical one supposedly being more efficient and reliable. I tried a few, but none would make my LEDs flash since the power draw was too low.
Last edited by jab; 12-15-04 at 10:45 PM.