Originally Posted by
steelbikeguy
well, that's a nice thought, but it ignores that the LED could simply be powered by half of the AC waveform when no bridge rectifier is used.
It also misses the possibility of wiring two LEDs in parallel, but opposing polarity. Each LED could conduct during opposite halves of the AC waveform.
I would suggest that your future posts be phrased in a way that reflects your tentative understanding of electronics. i.e. less "I know", and more "I think that it works this way...."
Steve in Peoria
In fact, that is what [MENTION=73614]rhm[/MENTION] did when he made home-made lights. His headlight and taillight were butt-to-butt, and they flashed alternately. You can't see the flashing at high speed because the flashing ends up being steady. You can't see it at low speed because you don't look at both lights at the same time. Or maybe you do, and maybe you can see the alternation.
I think the theory that the LED uses half of the phase is plausible, but I don't know it as fact. And if it's true, then I shouldn't have trouble running dynamo lights off a 5C DC battery.