pulse output

Discussion in 'General Electronics Chat' started by ste1171, Jan 21, 2014.

  1. ste1171

    Thread Starter New Member

    Jun 5, 2012
    I am not an electronics guy but need a circuit that will do the following:

    there will be two separate momentary buttons as inputs and one output
    pressing PB1 will give a one pulse at the output
    pressing PB2 will give a two pulse at the output

    The output will be wired into an input on my datalogger.

    Any ideas? is this something that can be purchased off the shelf?

  2. shteii01

    AAC Fanatic!

    Feb 19, 2010
    I can see how I can do it with microcontroller, but that might be more hardware than you need.
  3. inwo

    Well-Known Member

    Nov 7, 2013
    What output levels?

    What timing and debouncing is required?

    It could be as simple as connecting button one direct and using circuit that triggers on change of state from the second button. (twice with one press)

    Or maybe a "smart" timer or plc.

    An ic timer, latch, and counter?
  4. Bernard

    AAC Fanatic!

    Aug 7, 2008
    Might try 3 555's cascaded, first gives 2 pulses & debounces SW, 2nd gives spacing between pulses, & 3rd gives a single pulse & debouncing if pulses are longer than about 20 ms.