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Microphone Circuits
Page 5
Microphones: #-B
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Last Updated on:
Friday, June 04, 2021 01:53 PM |
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Circuits Designed by Dave Johnson, P.E. : |
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POP FREE MICROPHONE ON/OFF SWITCH CIRCUIT -
This 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
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Links to electronic circuits, electronic schematics and designs for engineers,
hobbyists, students & inventors: -
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Op-Amp Microphone Preamplifier - A high quality microphone
preamplifier using a single power supply, suitable for dynamic or electret
microphones. The opamp used can be any low noise, high performance type,
e.g. NE5534,TL071, OPA 371 etc….(schematic added 01/2010) |
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Parabolic dish mic amplifier - Schematic only, no circuit
description |
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Parabolic Microphone - An Article & Circuits for Parabolic and
Shot Gun Microphones ….(design added 12/08) |
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Perimeter Monitor - Using a single cable such as speaker wire or
doorbell cable, this circuit can be remotely positioned, for example, at the
bottom of a garden or garage, and used to detect all sound in that area. The
cable can be buried in a hosepipe or duct and is concealed out of sight. The
mic is an ordinary dynamic mic insert....[Circuit design by Andy Collison] |
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Pop Free Microphone ON/OFF Switch Circuit - This 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. …. [Hobby
Corner Circuit by Dave Johnson] |
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Portable Microphone Preamplifier - High headroom input circuitry. 9V Battery
powered. (added 6/06) |
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PreAmplifier Computer Microphone - This circuit was submitted by Lazar
Pancic from Yugoslavia. The sound card for a PC generally has a microphone input,
speaker output and sometimes line inputs and outputs. The mic input is designed for
dynamic microphones only in impedance range of 200 to 600 ohms. Lazar has adapted the
sound card to use a common electret microphone using this circuit....(electronic
design added 6/07) |
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PreAmplifier for Microphone or guitar use - suitable for guitar or
microphone use.... |
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Radio Shack Pressure Zone Microphone PZM Modifications - (electronic
schematic / circuit added 4/02) |
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| Simple FM Transmitter Schematic - There is no
thrill like the thrill you get from operating equipment you have built yourself. If
you have never built a project from a magazine before, let this be your first--you'll
see how much satisfaction and fun you can have!… [Tony van Roon] |
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Simple microphone preAmplifier #2 - This is a simple microphone preamplifier
circuit which you can use between your microphone and stereo amplifier. This
circuit amplifier microphone suitable for use with normal home stereo amplifier
line/CD/aux/tape inputs. This microphone preamplifier can take both dynamic and
electret microphone(added 4/05) |
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Simple Stereo Electret Microphone PreAmplifier - (circuit / schematic design
added 6/06) |
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Sony C 37Condenser Microphone - information with circuit diagram (added
5/02) |
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Standard Microphone Preamp Input Circuitry - AS016 Jenson Transformer
Application Note (app note 04/03/02) |
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Stereo Electret Microphone PreAmplifier - (circuit / schematic design added
6/06) |
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The Big-E Stereo Parabolic Microphone - This device is a stereo amplifier
for a high sensitivity stereo parabolic microphone. It can be used for listening to
distant sounds. Typical parabolic microphones are monophonic, this unit has a stereo
audio path that helps produce more realistic sounding audio. The Big-E can be used
with headphones or as an audio source for a stereo tape recorder....[(C) G. Forrest
Cook January 1, 2005] |
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Theory & Construction of MIC Splitters - (electronic schematic / circuit
added 4/02) |
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Tube Microphone Preamp - (circuit / schematic design added 6/06)
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Underwater microphone - Schematic only, no circuit description |
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Using ECM Mic Inserts - This page describes how to use or connect and use 2
and 3 terminal electret condenser microphones (ECM's). The bottom section shows the
connections and how to substitute from one type to another….(Circuit by Andy Collison
added 03/03) [Written by Andy Collison] |
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Vacuum Tube Microphone Preamp/Direct Box Project - from January1997 EQ
Column, includes phantom power supply (added 5/02) |
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Variable Amplifier Impedance - Figure 1 shows two amplifiers (shown as
opamps), with (a) being conventional voltage drive, and (b) is current drive. The
output impedances are in the order of zero ohms and infinite ohms in each case (this
IS a theoretical discussion at the moment!). The gain will appear to be exactly the
same for each into an 8 ohm resistive load,.... |
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Voice-Over Circuit - This is a circuit where a microphone and preamp circuit
(voice circuit) have priority over any other audio signal. You can think of this as a
one way intercom, if the main amplifier is used for listening to music, then when the
push to talk switch is pressed, the amplifier is switched to the voice
signal....(added 06/07) [Andy Collison] |
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Wireless microphone - Schematic only, no circuit description |
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