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profdant139's avatar
profdant139
Explorer II
Dec 11, 2015

LED bulbs: can they function on both 12V and 120V?

I stopped in at an electronics store -- told the guy I wanted to build a small 12v LED table lamp (for reading) that would plug into my cigarette lighter socket in my RV. He had a display of some rea...
Ivylog's avatar
Ivylog
Explorer III
Dec 11, 2015
12V LEDs are polarity sensitive so if it does not work when you plug the lighter in, reverse the two wires. By now you know you should not plug a LED into 110V.

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