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Usb solar charger

Discussion in 'General Electronics Discussion' started by coreydebruin, Oct 24, 2012.

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  1. coreydebruin


    Oct 24, 2012
    ok so, I'm currently trying to create a Solar charger for my Huawei U8180i Phone
    I would be using a 5W (12v) solar panel, the battery is 3.7v 1200mAh (4.4W),
    now I was thinking of sticking the solar panel to the case and making a usb port somehow and attaching the solar panel to it then just using the phone's usb charger with that...
    my concern however is I may overload the circuit due to the voltage difference, so I need someone to tell me if that's actually safe or if I need to change the voltage or change something else, and if so how I should go about it.

  2. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    Jan 21, 2010
    Get hold of one of the many USB adapters for cigarette lighter sockets.

    These efficiently convert a voltage near 12V to 5V and have the required USB connection.

    If you look in the right place you'll find them for a couple of bucks each including freight.
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