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Engineering
Electrical Engineering
Building a solar phone charger
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[QUOTE="Simon Bridge, post: 5415379, member: 367532"] Whether there is a cut-off/overcharge function on the "rectifier" will be a question for the manufacturer: but they are pretty essential for phones so anything specifically built for charging phones should have one. There is no way for anyone to be able to tell for sure here. iirc some phones have the cutoff built in. If your phone would normally charge directly off a USB port, then all your charger has to do is imitate the USM port output. From your description, the "phone charger" is a circuit powered by some AA batteries ... the AA batteries are, in turn, trickle charged from a solar panel. Suggest you test it using an old/cheap phone. [/QUOTE]
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Building a solar phone charger
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