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Faraday's law and the perfect flashlight

Jan 1, 2003

AC Delco and Hong Kong-based Daka Development Ltd. have designed a new flashlight based on Faraday's law of induction.

Simply shaking the flashlight passes a magnet through a wire coil generating electrical energy. A capacitor then stores the energy and delivers it to a bright LED. The new flashlight, called the Faraday Star, will illuminate a 5-foot-diameter area at 50 feet and is visible for up to one mile. It operates for five minutes after 30 seconds of shaking -- all without batteries.

The new flashlight is extremely durable and is built with a watertight housing. If dropped overboard, the light will also float.


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