Solar AAA battery charger

Discussion in 'The Projects Forum' started by taozeo, Mar 7, 2013.

  1. taozeo

    Thread Starter New Member

    Nov 11, 2010
    4
    0
    Hello all!

    I'm trying to design a circuit in which I can charge a rechargeable AAA 1.5v battery with a small 0.5v solar cell (space is limited so only enough room for one solar cell). Now I realize I'll need at least 1.5v-1.8v to charge a AAA battery--so I was thinking of having the solar cell charge a capacitor up to the required 1.8v's and then discharge this energy into the battery; repeating this process until the battery is fully charged.

    Another requirement is that the device may at times be using power from the battery simultaneous to while it's charging; would there be any issues or possible damage to the device? If so, what kind of protection circuit should I implement?

    Any advice/tips or example circuits you can help me out with would be great!
     
  2. Mr.Gadget

    New Member

    Nov 25, 2012
    7
    0
    You can't get out more than you put in. Physics says you can't di it with what's available today. Wire up more solar cells to give yourself a chance.
     
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