Pulse without logic gates

Discussion in 'The Projects Forum' started by hhoncho, Mar 8, 2007.

  1. hhoncho

    Thread Starter Member

    Mar 18, 2006
    19
    0
    Hello People,

    I'm looking for some advice on building a simple circuit which sends a short pulse through a coil on activation of a sensor, then removes power to the coil.

    I have an idea how to do this by directing the signal from the sensor to a grounded capacitor then to one input of an XOR gate and using the unadulterated signal from the sensor as the other input, the problem is that I would like to achieve the same result without using any logic gates.

    Is there a way to achieve the same short pulse to the coil using transistors or something instead of the XOR gate?
     
  2. kubeek

    AAC Fanatic!

    Sep 20, 2005
    4,669
    804
    Is 555 timer in monostable connection a better solution?

    If I understand correctly you want the coil powered for a short time, even if the input signal is still on?
     
  3. hhoncho

    Thread Starter Member

    Mar 18, 2006
    19
    0
    Yes that is it exactly, power to the coil only for a short time even though the input signal is still on.

    I have a 555 timer around here somewhere, monostable connection huh i'm gonna go look that up.

    Is it possible to determine the duration of the on time using this setup?
     
  4. thingmaker3

    Retired Moderator

    May 16, 2005
    5,072
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  5. hhoncho

    Thread Starter Member

    Mar 18, 2006
    19
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