Sound activated burglar alarm system

Discussion in 'General Electronics Chat' started by abey007, May 18, 2011.

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  1. abey007

    Thread Starter New Member

    May 18, 2011
    Hello everyone. I am new here in the site. And am a beginner in electronics. Am working on a small project- SOUND ACTIVATED BURGLAR ALARM. I'v built the sound amp. around lm386 and 741. I'v also built an oscillator 4 the alarm.
    My trouble nw is to build a LATCH SWITCH that will take the signal from the amp and use it to trigger the oscillator & remain on until a reset button is pressed.
    I hv transistors BC141 & 2N2222 & IC- CD4013.
    Pls hlp me in designing this.
  2. beenthere

    Retired Moderator

    Apr 20, 2004
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