Switching DC+ to DC- via Timer....Help

Discussion in 'The Projects Forum' started by Ghostz, Dec 30, 2014.

  1. Ghostz

    Thread Starter New Member

    Dec 30, 2014
    2
    0
    I would like to create a timer that switches DC+ to DC- on a 24 hour cycle....
    Input power: 120V AC or battery powered DC...
    Anyone have any suggestions? or is their anything out there that does this?

    Thanks....
     
  2. MikeML

    AAC Fanatic!

    Oct 2, 2009
    5,450
    1,066
    How about a purchased AC-line-powered timer driving a small DPDT relay with a line-voltage AC coil? I have a couple of these timers, and they can be programmed to turn on at a specific time, and turn off exactly 24hours later.

    The DPDT relay contacts can be wired like an H-bridge to reverse the polarity of a DC voltage:

    [​IMG]
     
    Last edited: Dec 30, 2014
  3. Ghostz

    Thread Starter New Member

    Dec 30, 2014
    2
    0
    Thanks or the response.. i will check that out..
    What I am trying to do is this:

    Have a box that you can mount outside.. (battery operated would be best) It should have have a manual timer. It connects to a single wire that runs around the perimeter of the property...(but does not complete the circuit) So for instance.....
    I can set the timer for 6am -thewire would have a positive charge... then at 6pm it would switch and the wire would have a negative charge.......

    i that makes sense? I would like to do it the simplest way.......
     
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