Technology
HOW TO – Build a simple Luxeon LED bike headlight

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Ian writes – “This is a simple bike light which can be contructed with a minimum of tools. It is bright enough to be useful as a headlight, is fairly robust, and cheap to construct. It’s perfect for commuting and does a surprisingly good job for mountain biking too. The whole thing, including rechargeable batteries, weighs about 200g and will run for over two hours. “Link.

Related:
Other bicycle light projects – Link.

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