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Solar Cells

Discussion in 'Hobby Electronics' started by A.J., Oct 25, 2004.

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  1. A.J.

    A.J. Guest

    Hey All,

    I have a little unit that draws about 5mAh at 3.6V and I was thinking
    about hooking up a small 3.6V battery via a solar panel to charge it
    but I am having trouble finding any solar cells that are suitable.
    Size is my main issue as I am looking for something to fit on top of a
    match box or a whorst case 50 x 50mm. I don't think I will need any
    more that 10mA closed circuit current, does anyopne know where I may
    be able to find such a cell/panel??

    Thanks in advance for any helpful replies!!

  2. agamlen

    agamlen Guest

    try here:

    Then the solar panel option.
    There are in the States but they will post to Aus.
  3. MC

    MC Guest

    If you have some spare silicon diodes, they will produce
    about 0.3V at roughly 5mA or so in bright sunshine.
    The diodes will need to be in a non-black package
    to let the radiation in. (eg ceramic or painted-glass)

    Also try some clear LEDs, the voltage is higher but the
    current is usually less than a Si diode.
  4. Either Jaycar or Oatley have a range of small solar panels, you might
    find one to fit.
    An alternative is to buy one or two of the many solar powered
    calculators and rip them apart.


    Adrian Jansen adrianjansen at internode dot on dot net
    Design Engineer J & K Micro Systems
    Microcomputer solutions for industrial control
    Note reply address is invalid, convert address above to machine form.
  5. A.J.

    A.J. Guest

    Thanks again for the replies, that sorts me out:)
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