Electronic Circuits and electronic circuits, electronic schematics plus an extensive resource for hobbyists, inventors and engineers

DiscoverCircuits.com, has 30,000+ electronic circuits, cross-referenced
into 500+ categories.    We have searched the web to help you find quick design ideas.
We make every effort to link to material posted by the designer. 
Please let us if you would like us to link to or post your design.

HOME Schematics Discover Forum Hobby Corner Dave's Circuits Electronic Resources Contact Info
Imagineering Ezine    Discover Solar Energy Dave Johnson & Associates Faraday Touch Switches

DiscoverCircuits.com -- Hobby Corner
Last Updated on: Monday, August 18, 2014 04:34 AM

Hobby Circuits' Category List

The contents & graphics of Discovercircuits.com are copyright protected.
LINKING to Dave's circuits is permitted but DO NOT COPY any files to your WEB SITE server

More  Switch Circuits, Microphone Circuits


This electronic hobby circuit uses a simple technique to eliminate the usual “pop” sound when an electret type microphone is switched on or off.   The circuit is completely passive and will work on dynamic and electret type microphones.  The circuit shows a typical three wire microphone connection.  On some microphones only two wires are used.  With those two wire circuits, wire the 100uF capacitor shown below to the + side of the microphone.

The circuit works by shunting the audio portion of the microphone signal to ground, when the switch is closed.  This action does not change the DC level on the microphone output, thus the on and off switching should not produce the usual “Pop” sound.  Sometimes such pops are so severe, that they can blow out amplifiers or speakers.

Click on Drawing Below to view PDF version of Schematic

Circuit Pop Free Microphone Switch designed by Dave Johnson, P.E. (Feb 15, 2002)

More  Switch Circuits

Hobby Circuits' Category List
eMail David A. Johnson, P.E. about this circuit

 Linking is ALLOWED but COPYING any content or graphics to your web site is EXPRESSLY PROHIBITED.

HOME Schematic Lists Hobby Corner Dave's Circuits Electronic Resources Contact Info


 About Us   |  Advertise on DiscoverCircuits.com   |   Report Broken Links  |    Link to DiscoverCircuits.com  |    Privacy Policy

Copyright  2002 - 2014 David A. Johnson & Associates.  All Rights reserved.