WIND POWER GENERATOR… HOW TO MAKE ONE?
Sticking fan blades on the cardboard generator won’t work; it turns too slowly and won’t light the bulb. To run a bulb, this simple cardboard generator must spin VERY VERY fast. Fan blades probably won’t spin it fast enough. SO DON’T LIGHT A BULB! Instead, buy an $5 AC voltmeter. For science fairs, instead of running a light bulb, you can just display the AC voltage created by the wind power. A wind generator might light a bulb or an LED if you wind more than 1000 turns of wire onto the cardboard. Or, you could try using two large (expensive and dangerous) supermagnets instead of four black ceramic magnets. Or look just above, in the part about making a tiny generator that uses a wooden disk and “magnetic gears.
