Bicycle magnetic headlight
Bulding a bicycle electricity generator helps to understand how it is possible to produce electricity from a magnet, a copper wire coil and a movement. This technique found in traditional bicycle dynamos is also used in electric power stations.
This DIYs project shows a clever solution that avoids the use of batteries which contain chemical products and are quite expensive. Unlike a traditional bicycle dynamo, friction is limited as there is no direct contact with the wheel.
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