DPDT relay alternative

Discussion in 'The Projects Forum' started by RodneyB, Jun 10, 2014.

  1. RodneyB

    Thread Starter Well-Known Member

    Apr 28, 2012
    I am making a pool ioniser. It is powered from a Polycrystalline silicon solar panel.

    Optimum operating voltage is 6 Volts and the optimum operating current is 0.05 amps.

    The circuit supplies 2 copper electrodes. I want to make them alternate every hour and was using a double pole double toggle relay wired as per attached drawing.

    I have a PIC10F200 which I can get it to toggle the output. I just don't know how or what I could uses in place of the relay.

    Any assistance will be greatly appreciated
  2. prairietech

    New Member

    Mar 12, 2013
    The relay you attached should work fine. Why are you trying to find a substitute?
    If you do use a relay, be sure the include a subbing diode across the relay coil to prevent damage to the output of your PIC.
  3. inwo

    Well-Known Member

    Nov 7, 2013
    An h bridge should work as a substitute.

    The relay however will not work as shown, as when NO. contacts close, it connects + to -.
    Last edited: Jun 10, 2014
  4. #12


    Nov 30, 2010
    You got your criss-cross in the wrong place.