Pulse to steady signal

Discussion in 'General Electronics Chat' started by newuser1029834535, Jul 22, 2016.

  1. newuser1029834535

    Thread Starter New Member

    Jul 22, 2016
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    I need to make a signal from an IR sensor to last at least half a second. The original signal may last very little so I need to make it longer. What kind of IC/circuit do I need to build?
     
  2. benta

    Member

    Dec 7, 2015
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    24
    Monostable multivibrator. I'm 100% certain someone will suggest a 555.

    Benta.
     
  3. atferrari

    AAC Fanatic!

    Jan 6, 2004
    2,838
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    Even with transistors or a very small micro...:)

    The key expresion for a search is "pulse stretcher".
     
  4. AlbertHall

    Distinguished Member

    Jun 4, 2014
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    If you can't do it with a '555 it's not worth doing ;)
     
  5. dannyf

    Well-Known Member

    Sep 13, 2015
    2,196
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    the answer depends on what you meant by "long".
     
  6. BillB3857

    AAC Fanatic!

    Feb 28, 2009
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    Or PVC pipe!
     
  7. benta

    Member

    Dec 7, 2015
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    That's the best post I've read in a long time. My stomach muscles still hurt from laughing. However, I'm still waiting for the suggestion that a 555 is the ideal gate driver for a 300 A IGBT. But it will come one day...
     
  8. AnalogKid

    AAC Fanatic!

    Aug 1, 2013
    5,653
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    Why? There are hundreds of pulse and timer circuits. A few more details will help narrow the choices.
    What is your application?
    What is the output pulse used for?
    What voltage does it need to be?
    How much current must it source or sink?
    etc.

    ak
     
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