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by maples37
251 days ago
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Some alternators ironically require electricity to make electricity. They don't have permanent magnets inside, but instead use electromagnets. So from a stone cold battery, if there's not enough power to get those electromagnets functional, you don't have a way of converting that rotational energy into electricity. https://en.wikipedia.org/wiki/Alternator#By_excitation I do wonder how much current that requires, though. In a pinch, could a duct-taped string of AAs be enough to get you going? |
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