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Help: Closed Loop Monitor

Discussion in 'Electronic Basics' started by Thomas McMechan, Sep 16, 2003.

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  1. I remember a while ago, I found an article on the web regarding building
    DIY closed loop monitor for car. Lost that article now.......

    Basically it uses one LED to inducate either the car is in close or open
    loop.

    I think it uses a LM311N, a cap and a resistor.....
    Has anyone got the detail of this circuit? or know any similar circuit??

    Thanks in advance!
     
  2. Baphomet

    Baphomet Guest

    Google "closed loop monitor for car"
    https://www.autospeed.com/PTNR_f2/cms/access/purchaseRequired.html?buy=A&id=1716
     
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