convert latch to momentary ?

Discussion in 'General Electronics Chat' started by leonheard, Apr 21, 2013.

  1. leonheard

    Thread Starter Member

    Jan 8, 2013
    48
    0
    hi

    i have a ht12D decoder receiver, but its a latch, i want it to be momentary ( for my toy car project) is there anyway to make at least some "outputs" momentary?

    i dont want to buy another decoder IC :p
     
    Last edited: Apr 21, 2013
  2. crutschow

    Expert

    Mar 14, 2008
    13,056
    3,245
    What do you mean you want it to be momentary? Just input to the transmitter whatever you want the output to be after the "momentary" output.
     
  3. leonheard

    Thread Starter Member

    Jan 8, 2013
    48
    0
    yea but when i press the button (transmitter) the led stays ON (RECEIVER), i want it to turn OFF when i dont press the button anymore
     
  4. crutschow

    Expert

    Mar 14, 2008
    13,056
    3,245
    Post a schematic of the transmitter circuit. Did you build this transmitter?

    What is "OFF"?
     
  5. leonheard

    Thread Starter Member

    Jan 8, 2013
    48
    0
    i see nobody knows, am just gonna buy a decoder momentary option
     
  6. crutschow

    Expert

    Mar 14, 2008
    13,056
    3,245
    I could perhaps help if you could answer my questions. :rolleyes:
     
  7. ScottWang

    Moderator

    Aug 23, 2012
    4,858
    767
    The easy way is to using RC differentiator and bjt, it will let the output going to high or low for a limited time, but you can't wish the output time will follow your pressed time.
     
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