an electronic circuit detects open and short circuit

Discussion in 'The Projects Forum' started by mae2008, Feb 8, 2009.

  1. mae2008

    Thread Starter New Member

    Dec 1, 2008
    4
    0
    Dear Friends
    I want to build a circuit that detect a short and open circuit between two wires. when the two wires are short, a led lights when open, led turn off.
     
  2. bertus

    Administrator

    Apr 5, 2008
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  3. NavjeetSingh

    New Member

    Feb 8, 2009
    9
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    If I'm getting it right then you should be able to do it very easily.

    Just take a battery , connect it with a wire to LED . Put a switch and crocodile plugs in between and your circuit is ready.

    Method to Test: Put the crocodile pins on the terminals of the circuit or wire arrangement. IF the Led glows circuit is intact and if doesn't it's open.

    I hope it helped you.
     
  4. flat5

    Active Member

    Nov 13, 2008
    403
    17
    "Just take a battery , connect it with a wire to LED .
    Put a switch and crocodile plugs in between and your circuit is ready."

    Not quite. A current limiting resistor is needed to not burn out the LED.
     
  5. KMoffett

    AAC Fanatic!

    Dec 19, 2007
    2,574
    230
    Are the wires attached to a device?...a circuit?...power?

    Ken
     
  6. Bernard

    AAC Fanatic!

    Aug 7, 2008
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    This is a little old but it worked circa 1955, cable 13 twisted pair ,1400 ft,long. Normal procedure for breaks was to flex cable and hope to get a hit; slow and unrelyable; I designed a cable fault panel which switch select faulted pair: 1 check capacity vs good pair, with bridge ckt.to determine approx. distance; inject a 4kHz signal and with hand held high gain amplifier & head phones quickley found exact point of break. Could also measure resistance compaded to good pair to find approx location of short. No LEDs back then.
     
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