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  1. #1
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    problem with electret MIC

    Hi,

    I am using Spirit-On wireless RF TXK1 & RXM1 module. When I am connecting PC speaker out to TXK1 input, I am able to listen sound on speaker. but when I am connecting electret MIC to TXK1 input and playing audio in-front of MIC, no sound is produce on speaker.

    pls let me know what amplification ckt require for electret MIC?

    Any references would be highly appreciated.

    Regards
    Ashwani

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  2. #2
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    Re: problem with electret MIC

    An electret mic needs to be powered properly. Its output is about only 10mV into a 10k or more load.
    You probably need a preamp circuit to amplify its output level.



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  3. #3
    Member level 3
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    Re: problem with electret MIC

    Thanks for ur reply. After giving proper voltage to electret mic, its working fine.



    Regards
    Ashwani



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