5v Off delay circuit

Discussion in 'The Projects Forum' started by bytraper, Jan 25, 2012.

  1. bytraper

    Thread Starter Active Member

    Sep 28, 2010
    126
    4
    Hi everyone!

    I am looking for a small circuit (without using any IC's) to delay the turn off of a 5v logic output for an adjustable amount of time.

    At the moment, my project will trigger the turn on (+5v) to a flip flop but it turns off too quickly!
    I need to hold the delay the turn off, after the trigger stops for an adjustable amount of time (max 10s) while maintaining the 5V to the output.

    Has anybody got a circuit that will do this using discrete components? I don't want to add any more IC's.

    Thanks for any and all help!
     
    Last edited: Jan 25, 2012
  2. praondevou

    AAC Fanatic!

    Jul 9, 2011
    2,936
    488
    How long has to be the time to be adjusted?

    From 0 to .... ?
     
  3. bytraper

    Thread Starter Active Member

    Sep 28, 2010
    126
    4
    about max 10 seconds.
    I also have 1 spare flip-flop (4013) in the circuit.
     
    Last edited: Jan 26, 2012
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