Bikes Fun & Games Technology
Contactless dynamo bike light


Instrucrables user vbnicolau made this how-to for making a dynamo-powered bike safety light from an old relay coil and a few hard drive magnets.

6 thoughts on “Contactless dynamo bike light

  1. I’ve always wanted to build something like this. I’m glad someone out there finally did it and documented it! You could probably put a second magnet too!

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Becky Stern is a Content Creator at Autodesk/Instructables, and part time faculty at New York’s School of Visual Arts Products of Design grad program. Making and sharing are her two biggest passions, and she's created hundreds of free online DIY tutorials and videos, mostly about technology and its intersection with crafts. Find her @bekathwia on YouTube/Twitter/Instagram.

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