two closed going open contacts from one

Discussion in 'General Electronics Chat' started by kevmac72, Aug 26, 2007.

  1. kevmac72

    Thread Starter New Member

    Mar 12, 2007
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    i have a pir which gives a closed going open contact. My problem is that i need two independant outputs to trigger two devices. when i loop through both devices - throught the closed going open, only one will trigger. Does any one know of a solution which preferably does not use power
     
  2. hgmjr

    Moderator

    Jan 28, 2005
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    What are you referring to with the term "pir"?

    hgmjr
     
  3. Voltboy

    Active Member

    Jan 10, 2007
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    I think he's referring to a pyroelectrical infrared
     
  4. hgmjr

    Moderator

    Jan 28, 2005
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    I was thinking either "passive infrared" or "photo infrared". I just want to make sure I was clear on what was meant.

    hgmjr
     
  5. kevmac72

    Thread Starter New Member

    Mar 12, 2007
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    Sorry, i was referring to Passive infra red - alarm sensor
     
  6. beenthere

    Retired Moderator

    Apr 20, 2004
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    I suppose you could pass current through your normally open contacts (assuming you are referring to a relay) and use the interruption to trigger your two external events. As to using no power, that restriction makes it impossible to devise any external circuit. A device may use very little power, but it will need some in order to function.
     
  7. kevmac72

    Thread Starter New Member

    Mar 12, 2007
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    0
    thankyou i think i have solved it with no additional power...using diodes to stop the original signal corrupting the second
     
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