Solar Cell Charger

Thread Starter

RodneyB

Joined Apr 28, 2012
697
A few weeks ago I posted a question about using a 0.3 Watt solar panel to charge a cell phone.

I am not sure why but this circuit seems to be discharging the cell phone . Not sure why.

Any help will be appreciated.

Thanks
 

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wayneh

Joined Sep 9, 2010
17,495
0.3W is way too small to charge most phones. You need a minimum of 100mA at 5V, which is 0.5W. And I think a minimum of 0.5A is more likely, meaning 2.5W. That's after all losses.

Many devices won't charge unless they see an adequate supply. Some also look for proper voltages on the data pins. You should be able to research what your particular device requires.
 
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