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DiscoverCircuits.com
-- Hobby Corner
Last Updated on:
03/19/2008 06:54:11 AM |
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Pop Free Microphone Switch |
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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. |
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Click on Drawing to view PDF |
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