Difference between revisions of "Mechanically powered flashlight"

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=== Dyno torch design ===
In the photo, the L-shaped handle spins a gear, which in turn spins the dark grey [[magnet]] mounted on a [[flywheel]], seen on the left. The magnet induces an electrical current in the red copper winding, seen on the right. The current from the copper winding flows through the incandescent bulb filament (not shown). Because electrical power is only produced when the handle is squeezed, a [[switch]] is not needed. The flywheel makes sure the light is fairly constant, despite the fact that the power supply (the squeezing) is intermittent.
 
== Faraday flashlight ==
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