I thought LED's run on DC .

Jerry SrOGR Forum Member

I am stumped on this one. I purchased some 5mm white led's with a 510 ohm resistor attached to each led. It was cheaper then me doing it myself and my wife learning new words Here is stumper, these led are rated 12-14v dc with resistor in circuit. No problem hooked them up to 14 v dc they light up, nice & bright. I then hooked one up to my train transformer at 14V AC , same brightness as when I hooked it up to DC. It has been on about 36 hrs , no change in brightness at all . I like playing around with electronics, have designed circuits as a hobby, I have hooked up bipolar led ( red & green) to ac feed, got yellow due to pulsating 60 cycle. If this is how this is working will not need a bridge rect to hook up as head lights .

Thanks

6/18/1212:31 AM

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