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    This article describes an compact electret microphone amplifier but you can connect dynamic microphones with low resistance. Electret microphones can be inserted in the same box with the amplifier, it only need 5 to 10V or 9V battery with a current consumption of just 1.5mA.

    Electret microphone amplifier circuit

    electret microphone circuit diagram

    Electret mic amplifier pcb

    electret mic amp pcb

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    7 Responses to "Electret Microphone Amplifier Circuit"

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    1. Abdoul halim says: on September 10, 2008 at 9:27 am

      Hello, I have built a fm transmitter by transistor TA7642 but there is a problem with microphone amplifier. Thank you from abdoul halim.

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    2. P. Marian admin says: on September 10, 2008 at 1:41 pm
        member

      You’re welcome. I hope you’ll find all the desired circuits schematics.

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    3. hi, i am building this electronic microphone amplifier and i would to know where i could find the datasheet.

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    4. How can I connect a MP3 player line out to Mobile Phone microphone headset?

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    5. Hello!
      In what program did you make that scheme? I’m asking you because I use Or.Cad.Schem.atics and I can’t find the electret microphone in their library. If you are interested, I use this part in a circuit for detecting the room noise.
      Best regards!

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    6. C.Mitra Chinmoy Mitra says: on March 28, 2010 at 12:06 pm

      Dear Sir,
      There is something seriously wrong here! The circuit schematic is of a Mic preamplifier, but the PCB layout is of something else! Could you please explain?

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      • P. Marian ElectroSchematics.com says: on March 30, 2010 at 9:03 am
          member

        Yes you are right, I changed the diagram of the PCB layout, now should be OK. Thanks again.

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