Help with wiring an electret microphone

Discussion in 'The Projects Forum' started by KostasN, Mar 20, 2015.

  1. KostasN

    Thread Starter New Member

    Mar 20, 2015
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    Hello everyone!

    I recently bought a Knowles EK-23132-000 electret condenser microphone (http://www.digikey.com/product-detail/en/EK-23132-000/423-1008-ND/458519) and have serious problems wiring it, as this is the first time I am trying to do something similar.

    As I suspect, the microphone has to be powered by an external battery and also needs resistor(s) and capacitor(s) connected in order to be functional.

    Can someone provide me with a wiring diagram, showing all the connections, battery voltage and capacitor(s)/resistor(s) values??

    Cheers,
    KostasN
     
  2. bertus

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    Apr 5, 2008
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  3. KostasN

    Thread Starter New Member

    Mar 20, 2015
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  4. bertus

    Administrator

    Apr 5, 2008
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    Hello,

    On the digikey page is given a supply voltage of 1.3 - 10 volts.
    Mic_connection.png
    I assume the - of the powersupply goes to the NEGATIVE TERMINAL and the + of the powersupply goes to the POSITIVE TERMINAL.
    The OUTPUT TERMINAL will give the signal, I would connect it via a capacitor to the amplifier.

    Bertus
     
  5. KostasN

    Thread Starter New Member

    Mar 20, 2015
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    Thank you again for your help Bertus.
    In page 2 of the same document Output Impedance Ohms with minimum, nominal and maximum values are stated. Are these relevant to any resistor that needs to provide the 1.3 V dc voltage drop from a supply of 10 V dc?
     
  6. bertus

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  7. KostasN

    Thread Starter New Member

    Mar 20, 2015
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    Thank you very much Bertus, you are the man! As for the cost, I don't really care as long as it works! :D
     
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