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Simple generator
Uploaded by: wbeaty
Video Description:
http://amasci.com/coilgen/ Build this ultra-simple AC electric generator from magnets, wire, and cardboard. (And a big nail!) Light a small lightbulb, or flash a red LED.
This demonstrates how generators work. Now if you want a more useful device, use a small DC motor as a generator, since it has much better magnetics design. All motors are generators. Figure out how to spin a motor's shaft, and you can make a small powerful generator. Or... figure out how to convert the cardboard generator into a motor!
Tags for this video: amasci coil electricity experiment experiments fair generator magnet magnets physics science tutorial
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Or add lots more wire, like more than 500 turns. Red LEDs get easier to light.
"Multi purpose nylon binding posts 4-pack" from Radio Shack. Or just binding posts from All Electronics, goldmine, etc.
The light bulb needs at least 0.5 volts at .007 amps, or .00035 watts ( four milliwatts.)
If you spin it very fast so the bulb lights brightly, then its 1.5 volts and 0.025 amps, or 0.0375 watts (about forty milliwatts.)
It's not as simple to produce several watts needed by a normal flashlight bulb. You need supermagnets. Or add some iron parts made in a machine shop. Or just spin a small DC motor (it becomes a genrator.)
right back soon