Thread: The Technology Vent and Rant Thread
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Old 05-13-2019, 04:49 PM   #628
John F
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Join Date: Feb 2009
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Quote:
Originally Posted by Dylrob View Post
So a few months ago I bought a used bike for my stay in Germany. To conform with German safety laws, it has a built-in lighting system that’s powered by a dynamo that runs off of the front wheel rim. The bike is quite old... I bought it at a flea market for €30... and while riding outside a couple weeks ago, said dynamo kicked the bucket. They do sell replacement dynamos, however I haven’t been able to find much help in how to actually install it. Worse, this being an older model, it’s wired differently from modern bikes: whereas modern bikes have two separate wires, this system uses the metal bike frame in place of the grounding wire. So basically I’m not sure if one of those modern dynamos will even work, and if so, how to go about wiring it...?
Maybe check out your local bike shop?

IANEE, but if there are only two wires: one is '+' and one is '-', the one going to the frame is '-'. Please seek other opinions, and don't blame me if you smell smoke or here a pop.


Now I'm curious what you find out.
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