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Solar cells for trickle charging 9v "driveway alert"

Discussion in 'Electronic Basics' started by Gern, Jul 12, 2004.

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  1. Gern

    Gern Guest

    I was looking at this driveway alert system that alerts you when
    someone is coming up your long driveway. A co-worker has one, except
    that he says he has to replace the batterys twice a year.

    http://www.drivewayalert-usa.com/index.htm

    The 9volt would only need a tiny trickle of current to keep up. The
    problem is getting nine volts with hardly any current. Can solar
    cells andle this?

    Has anyone done anything like this?

    Thanks
    Gern
     
  2. Fred Stevens

    Fred Stevens Guest

    Solar cells that are readily obtainable (from Radio Shack etc) produce
    about 0.5V per cell. You can create a 9V supply from a series
    combination of these or perhaps find a solar panel that will give more
    voltage.

    Fred.
     
  3. JeffM

    JeffM Guest

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