Originally Posted by
sping
I'm planning to start out with circuit 5 without a C1, since it seems that I can get a non-polarized cap for C2. I'll add a C1 if I find the flicker annoying.
Cree XR-E and SSC P4 emitters don't need C2 producing a lot of light at very low speeds. Bottle and Bottom Bracket type dynamos don't need C1 but hub type dynamos do need C1, unless you want the headlight flashing at very low speed making you very visible. It will quit flashing at just a couple miles per hour. Here is the circuit I currently use.
I can recharge my GPS or cell phone as I pedal along.
