Mic Mic Scharf
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Feb 18,2022
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OPA "Alice" Pencil Microphone

Based on Jules Rykebushs Dual OPA "Alice" Microphone Circuit - a PCB fitting in some pencil microphone bodies.
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Published: Feb 18,2022
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Topic
DIY Electronics
Audio
Music
Audio DIY microphone opa
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  • Thanks for sharing this great project!

    I’m interested in building a version of this mic using a standard electret capsule. I was wondering:

    Where would I solder the capsule's ground wire on the PCB?
    I can see the connection point for the signal (drain), but I’m not entirely sure where the capsule's ground (source) should go.

    Any clarification would be really appreciated!
    Thanks again for making this available.

    Aug 04,20250 Comments
    Reply

  • Since this design uses an electret, I don’t need the hex inverter components right?

    Jul 16,20251 Comments
    Brian Kramer 2025-07-17 08:56:29Reply

    That's correct

    Reply

  • Hi, erst einmal vielen Dank für dieses tolle Board! Ich habe es in einem CM63 verbaut. Dann dachte ich mir, ich würde es gern zu einem Opic umwandeln. Ich weiß nur nicht, wo ich die 10k einlöten muss und ob ich die 200k dann einfach weglassen kann. Geht das in dem Schaltkreis?
    Herzlichen Gruß aus dem Saarland

    Jul 04,20250 Comments
    Reply

  • Do you know if the Primo EM21 fit the Takstar / MXL bodies?

    Mar 17,20251 Comments
    Engineer 2025-06-24 22:32:28Reply

    I know, that it doesn't fit the Takstar.

    Reply
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