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charge a 9v battery with usb

Discussion in 'Hardware' started by Luke228, Oct 12, 2006.

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  1. Luke228

    Luke228 Thread Starter

    Joined:
    Oct 12, 2006
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    hello all,
    this probably isnt the appropriate forum for this, if not ,, sorry !!
    i am going to make one of those carry around usb chargers from a 9v battery and a Lm7805 5v regulator and a few other bits.

    Now. heres the question

    If i wanted to have another usb cable connected up to CHARGE the BATTERY, what would i need?!?

    any help and/or drawings would be highly appreciated
     
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