Piggy Backing LED to trigger a relay

Discussion in 'The Projects Forum' started by Pietenpol, Apr 4, 2011.

  1. Pietenpol

    Thread Starter Member

    Dec 27, 2008
    26
    0
    I have a 5v relay that receives a signal from the scoring system to reset the machine in my Bowling center when it is the 10th frame and you don't get a second ball. I also have an infra-red beam that the ball breaks to trigger the scoring. When it isn't the extra ball scenario the machine cycles via a mechanical switch triggered by the ball striking a board in back of the machine. I would like to eliminate the mechanical switch (breakage and light balls from kids not setting it off specifically). My thought was to piggy back from the IR emitter/detector somehow and wire it into the 10th frame relay. There is an alignment monitor led if the beam is broken. Is there a way to monitor that and have it trigger the 5v relay? I would also have to build in a time delay of about 3 seconds before it does it.
     
  2. Wendy

    Moderator

    Mar 24, 2008
    20,765
    2,535
    As always, schematics are always the place to start. You show us yours, then we show you ours.
     
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