how to do windmill model
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First you need an motor also known as direct Current motor. And most important you need a rotor,you can find it on any electrical shop. And two wires. Connect those two wires to the positive and negative terminals of the dc motor and connect the other ends of wires to small led. And when you have fixed the rotor with the dc motor. Start turning the rotor rapidly. And you will see that the bulb slowly lights up. This process can also be reversed by connecting the heads of the wire with a batter.
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