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| + | ==== DIY Solar cells ==== | ||
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| + | A solar cell is a device for converting energy from the sun into electricity. The high-efficiency solar cells you can buy at Radio Shack and other stores are made from highly processed silicon, and require huge factories, high temperatures, | ||
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| + | http:// | ||
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| + | ==== solar powered gadets ==== | ||
| + | * http:// | ||
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