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Making a solar USB charger, question about amps?
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January 2nd, 2010
I’m going to make a solar USB charger. I’m going to buy 4 small solar panels and hopefully end up with an output voltage of ~5 volts. I’m pretty sure USBs have 500mA. I mightn’t be able to get a perfect 500mA but can anyone suggest a range of values that I should keep the amperage in?
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