Need help...

Discussion in 'The Projects Forum' started by idleup, Nov 25, 2013.

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  1. idleup

    Thread Starter New Member

    Nov 24, 2013
    I have modified a circuit that I posted previously. I am trying to use a 5vdc output from a controller (which is protected) to reverse polarity on a 110vdc load using a DPDT relay as an H-Bridge. Can you guys review it and tell me if it is okay?

    Specifically here are my questions:

    1. My last thread was closed to a violation of TOS based on how the LED was connected. Does this new design correct that problem?

    2. Do I need a diode across the coil?

    3. How can I protect the relay? (my first one got ruined somehow but am not sure how, I want to make sure it doesnt happen again)

    The relay used is this one:

    The load that the christmas light strand pulls is 110mA @ 110 vdc


    Last edited: Nov 25, 2013
  2. #12


    Nov 30, 2010
    No, You have made exactly the same mistake, and this is one of the reasons plugging LEDs into a wall outlet is not allowed on this site. You don't even recognize what the mistake is, so you shouldn't be trying to work with this.
  3. Wendy


    Mar 24, 2008
    I am closing this thread. If you try to post it again you will be banned.
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