intercom

Discussion in 'General Electronics Chat' started by ac_kumar, Nov 12, 2013.

  1. ac_kumar

    Thread Starter New Member

    Nov 12, 2013
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    hi guys i am a beginner in electronics
    I started a project on intercom
    using Lm741
    the project did not work quiet well ?

    I wan to know how to put a mic in circuit effectively ?
    what is high pass filter in reference to a mic ?
    which amplification chip should be used?
     
  2. Dodgydave

    AAC Fanatic!

    Jun 22, 2012
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    745
  3. ac_kumar

    Thread Starter New Member

    Nov 12, 2013
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    Thanks for reply
    I want to know why we plug resistance and capacitor with mic before connecting with amplifying chip.
    What is the drawback of 741 for intercom
     
  4. Dodgydave

    AAC Fanatic!

    Jun 22, 2012
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    745
    The capacitor blocks the dc from the mic, but allows the ac audio to pass.
     
  5. ac_kumar

    Thread Starter New Member

    Nov 12, 2013
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    thanks sir for reply
     
  6. ac_kumar

    Thread Starter New Member

    Nov 12, 2013
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    0
    Can anyone tell what is a high pass filter in refer of mic?
     
  7. Dodgydave

    AAC Fanatic!

    Jun 22, 2012
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    745
    It allows the high frequencies to pass through Treble 3Khz, whilst attenuating the low frequencies like Bass upto 300Hz. the cut off points are set by the R/C values.
    circuit
     
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