Hello All, I've got an old Honda NC50 Express that someone has gutted the wiring on. The ingition system is seperste from the lighting coil and is working fine. I've got a single wire that gives the AC output from the lighting coil. The other wire of the coil goes to ground( I guess). I get about 18VAC at idle and up to 40VAC at high revs. Even using a big diode to make pulsating DC results in too much voltage and my 12V bulbs still blow at high revs. So, what I need is a simple voltage regulator to keep my peak voltage below about 15 VDC pulsating. I don't want to put a battery into the mix. Someone suggested the Lucas system, where a zenier diode shunts to ground, but I can't find a schematic and I never really trusted Lucas. I'm old enough to remember guys on Brit bikes carrying a pocketful of zenier diode so that they could see at night. All I need is to keep the light from blowing I really don't care if they dim at idle.
Thank you in advance for any help, John.........