Lm741/747

Discussion in 'The Projects Forum' started by Seehat, Nov 5, 2013.

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  1. Seehat

    Thread Starter New Member

    Oct 14, 2013
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    Hi all
    I just need some help on my project.
    what it will take to make a circuit that indicates by turning an led on. when a particular Ac signal is applied. For eg. 2 + A(Sin(2pi*f*t) where 1<=A<=4 and 20hz <= f <= 20k Hz.

    and also switch on another led when the frequency is between 970Hz to 1.03khz.

    i only know that a narrow band pass filter will be required to pass the desired frequency.
     
  2. MikeML

    AAC Fanatic!

    Oct 2, 2009
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  3. bertus

    Administrator

    Apr 5, 2008
    15,377
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    Hello,

    As stated by MikeML, stick with one thread for one subject.

    Bertus
     
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