periodic signal detector

Discussion in 'The Projects Forum' started by ecjohnny, Mar 17, 2013.

  1. ecjohnny

    Thread Starter Senior Member

    Jul 16, 2005
    142
    0
    Hi i am weak in circuit design. Can anyone suggest to me what circuit can i build to detect a change periodic pulse. Basically i have a periodic pulse and i want to detect if its frequency changes. I am looking at LM358 comparator but having trouble. I have limited component to used. What is the simplest circuit/component i can build to achieve that

    Thanks John
     
  2. #12

    Expert

    Nov 30, 2010
    16,343
    6,828
    Connect the LM358 to detect the pulse and light an LED. Then watch the LED and record it's on and off times with a stop watch.
     
  3. KMoffett

    AAC Fanatic!

    Dec 19, 2007
    2,575
    230
    Google: "missing pulse detector" circuit
    Google: "frequency to voltage converter" circuit

    Ken
     
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