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Lighting and Electrical Things that go ZOT! Ignition components, batteries, lighting and accessories

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Old 01-23-2012, 02:13 PM
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Default Cheap & Easy Brake Light

Im a fan of cheap and easy, and have written a few threads of similar titles. While building my Lifan 125cc I began to think this bike will draw more scrunity from local Enforcement, so maybe it should have a brake light. I found a LED trailer clearance light on ebay for $3, it super bright. I mounted it in a well seen location below the seat. It came to me to use the brakes as a switch. I added a throttle stop to the cable between the levers. I then mounted a contact screw to a piece of stiffer but flexible plastic with a screw for a contact. Simply make the lead to the brake always on and hook the ground to the screw with a ring terminal. Adjust the throttle stop to hit the screw about 1/4" before the brakes seat. It makes positive contact and the plastic flexes increasing contact pressure. This is on V brakes but probably can be adapted to most brakes where you have access to cable travel. There is no danger of a short if the wire gets loose as it is a ground, light just will come on.
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Old 01-23-2012, 05:39 PM
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Default Re: Cheap & Easy Brake Light

That'll do it. The K.I.S.S method usually works well.
Very nice and clean. Thanks for sharing.
Tom
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Old 01-23-2012, 06:49 PM
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Default Re: Cheap & Easy Brake Light

Thanks Tom. Hopefully it may be of some benefit to builders needing a simple brake light.
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Old 01-28-2012, 10:48 AM
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Default Re: Cheap & Easy Brake Light

Finished wiring the bike and must say the brake light works extremely well. Very bright and easily seen. The ground switch set up is flawless in operation. I cant imagine it would ever wear out. May(or may not) require adjustment over the life of the brake pads, but that is done in a few seconds with a screwdriver. If all things were this easy!
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