New here. Very little EE background but am tinkering with a project that has so far been nicely straightforward. However I've run into a real snag.
I have a few dozen links so it's just as well that I cannot post them as a new member or it might overwhelm.
1980 vintage motorcycle.
Separate lighting and ignition coils.
Nominal 6v system generates 4vac ~ 16vac in the RPM range.
Maximum power from lighting coil is 27watts. Ac cycles vary along with voltage @rpm. I cannot yet find a source for that ac cycle range. Headlight is presently 6v 21w incandescent; anemic orange at idle, and almost useful at full RPM.
What I'd like to do is take fullest advantage of what little is on tap here to power paralleled LEDS. So far, all from Digikey's site I've received....
SMD LED (pair) XMLBWT-00-0000-000LT50E4CT-ND.
I'm now left with two calculations that are beyond my rudimentary electronic skills. How can I calculate the largest number of those LEDs, wired in parallel, before I run up against the 6A limit of that regulator? And, apparently, the toughest of all, the calculations for an optimum ripple/smoothing cap on the rectifier are so far beyond my abilities that I'm reduced to begging for someone to help me select one from digikey.
If discovery of the the ac cycle range is needed, and cannot be determined from the owner's manual itself (I can link to it), I will find a way to determine it if it's necessary. MY DMM doesn't do Hz, but can't it be calculated by
simply counting the number of coils in the lighting coil and multiplying them by the rpm range from lowest to highest? Maybe a little added algebra?
Thank you very much for any consideration of this.