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Switching between series and parallel

Discussion in 'Electronic Design' started by GGE5, Jan 24, 2005.

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  1. GGE5

    GGE5 Guest

    I have 2 solar panels, each outputing 8 volts at 50ma. I'll be using
    them for various applications, and would like to build a circuit that
    would let me switch between series and parallel output with the flip of
    a switch. My electonic knowledge is beginner-intermediate, and I've
    searched on the topic, but all I get is guitar amp articles. Any
    insight on a circuit design is very appreciated!

    Thanks,
    Alan
     
  2. Andrew Holme

    Andrew Holme Guest

    You can do it with just a DPDT toggle switch.

    I wonder if this is one of the diagrams you found:
    http://www.guitarnuts.com/wiring/humserparpp.gif
    ?

    That web page is about switching pick-ups, but the principle is the same:
    A+ and A- are the terminals of solar cell A
    B+ and B- are the terminals of solar cell B
    OUT + and OUT - are the output.
     
  3. +---------+----------> +OUT
    | |
    +---+---+ |
    | + | |
    | | |
    | - | |
    +---+---+ |
    | |
    +---------|-----O DPDT Center Off
    | \ Switch
    | V
    +--|---O O-+
    | | |
    | +---O O-+
    | ^
    | /
    +------|--------O
    | |
    +---+---+ |
    | + | |
    | | |
    | - | |
    +---+---+ |
    | |
    +------+-------------> -OUT

    If you want to do this remotely, replace the DPDT switch with a relay
    (you lose the easy option of an OFF position if you do this).
     
  4. GGE5

    GGE5 Guest

    Wow thank you, that was very helpful. It's amazing how simple it is, I
    was prepared to use a couple transistors and diodes :)
     
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