Rating is available when the video has been rented.
This feature is not available right now. Please try again later.
Published on Mar 19, 2008
I use an electric motor I built to spin a magnet inside a coil to induce current. Then, I use a rectifier to change the AC current to DC. Next, the current is stored in a capacitor, and once I flip the switch, the capacitor releases its energy and lights the LED. The circuit with the LED is basically the idea behind a faraday flashlight, except rather than shaking a magnet, we're spinning it.