Looking straight at two high power 10mm yellow LEDs.
Looking straight at two high power 10mm yellow LEDs.

Four very simple LED warning lights, with a total of 10 LEDs; 2x2 and 2x3. The yellow LEDs have four chips, making them pretty bright. And with a 40 degree light beam they are quite visible, even more so at a distance. So they make pretty good warning lights. Powered by: 12-13.8V.

Warning light with three yellow 10mm LEDs mounted under the bumper of car.
Warning light with three yellow 10mm LEDs mounted under the bumper of car.

By hot-gluing the resistors, LED, wire hole and around lid they can easily be made water-proof. For seven years I had two mounted in front of my old car, getting hammered by with water, snow and salt. Never had any problems with them.

These warning LED lights do not have any electronics to make them flash or strobe, they need to be driven by a controller; like this one: Warning strobe light controller.

Please leave a comment or tweet if you have any questions or feedback on this project.

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Project: Warning lights with 10mm LEDs by Thomas Jensen is licensed under CC BY-SA 4.0 with attribution required.

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  •   Created Mar 20, 2008
  •   Last modified 1 month ago

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