LED taillight

May 21, 2008 – 6:10 pm

My other Lambretta project:


(A bit fogged from letting wet superglue cure in an enclosed space. Oops.)

The prototype is good enough to use but needs to be revised. It’s bright, it doesn’t flicker, and it uses about 3-5W max so the headlight doesn’t dim when you step on the brake at idle. The problem is that the running light (”low”) is a little too bright compared to the brake light (”high”). Both are quite visible, but there’s not enough contrast between the two. I will definitely add more LEDs on the brake light circuit. I haven’t decided if I want to remove any from the running light.

Running light Brake light
25W 1157 bulb
LED Array

(All photos taken at F2.8, 1/10 sec exposure.)

Unlike the speedometer, these lights would be really easy to build in quantity, and the parts are pretty cheap. I’m going to work as quickly as I can to get production-ready prototypes made for 6V and 12V systems.

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