Microphones

Condenser Mic (kondensator mikrofon)

aka electret mic

• cheap

• simple

• simple electronics

• https://da.wikipedia.org/wiki/Kondensatormikrofon

• https://en.wikipedia.org/wiki/Microphone#Condenser

• about kuc mics

Schematics

DYI

• buildmic.pdf

  • copy of this page

• https://www.learningaboutelectronics.com/Articles/Electret-microphone-circuit.php

• https://www.learningaboutelectronics.com/Articles/Microphone-amplifier-circuit.php

• sparkfun about mic

  • local copy

From komponenten

• 6mm electret 6mm datasheet

• 9.7mm datasheet

A schematics

NB: for diagram below

DESCRIPTION.
The OPA344 and OPA345 series rail-to-rail CMOS operational amplifiers
are designed for
    precision
    low-power, miniature applications.

REMEMBER symmetric power supply (like plus/mins 12V) and uni sided ( like 0 til 5 V)

Another DIY from hackaday

• https://hackaday.io/project/202063-studio-quality-electret-mic-preamp-build

  • ./MB_727_v1_Schematics.pdf

Comments

• opamp should be a rail to rail, or at least powered with + - 8V

BJT based electret preamp

• https://www.instructables.com/Electret-Microphone-Preamplifier/

  • local copy

Jens

Last update: 260707 10:31:08

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