2 Wire Remote Microphone Amplifier: uses special amplifier module from Op-Amp Labs

AM Oscillator for Wireless Microphones:

Balanced Low Noise Microphone Preamp: very low noise, close to the theoretical minimum, high hum rejection and variable gain with a single rotary pot, similar to that used in many professional grade mixing desks

Basic FM Radio Transmitters:

Binaural MICs:

Boundary Layer Dish Microphone: ideas for a directional microph1-assembly  

Computer Microphone:

Condenser Mic Audio Amplifier:

Condenser Microphone hookup:

Constant Power "PAN" Control: Circuit for Microphone for Microphone Audio Mixing

Digital Quality Microphone Pre Ampl. Using the Model 425 OPAMP :

DIY Microphone for Sony MD R35 Minidisc Recorder: simple electret microphone

Dual JT MB C Microphone Combining Circuit: connect two microphones to1-microph1-input

Dual Microphones Separate Voice From Noise: 06/23/94 EDN-Design Ideas

Dynamic Microphone Amplifier:

Dynamic Microphone to Electret Microphone Input:

ECM Mic Preamplifier:

Electret Mic Apps: an electret MIC is the best value for money omni directional microphone you can buy for 90% of microphone application

Electret Microphone Connection: how to connect electret microphone

Electret Microphone Powering:

Interfacing Microphones to Computer Sound Cards:

line Level Signal to Microphone Input Adapter:

Low Noise Balanced Microphone Preamp: very low noise, close to the theoretical minimum, high hum rejection and variable gain with a single rotary pot, similar to that used in many professional grade mixing desks

Making a Rugged, Connectorized Microphone From a Panasonic Microphone Capsule:

Micro Spy With FETs:

Micro Spy With TTL:

Micro Spy With USW:

Microphone Amplifier:

Microphone Circuit Test Oscillator:

Microphone Mixer: Designed for3-dynamic microphones

Microphone Phantom Power Supply:

Microphone Polarity Tester:

Microphone Preamp:

Microphone Preamp: Very simple two transistor circuit

microphone Preamplifier:

Microphone uses "phantom power": 08/30/2001 EDN - Design Ideas / The electret microphone capsule is similar to those commonly used in telephones, cassette recorders, and computers. The element functions as a capacitor with a fixed trapped charge. Sound pressure moves a diaphragm, producing variations in the capacitance. This action produces an ac-output voltage with an extremely high source impedance. .

Mike Pads & Other Small Gadgets: Includes Active Direct Box circuit

Miniature FM Transmitter #1:

Miniature FM Transmitter #2:

Miniature FM Transmitter #3:

Miniature FM Transmitters #4:

Modification of Panasonic Backelectret Capacitor Microphone (WM GOAT DigiKey P9967 ND): This drawing describes the conventional hookup and option where FET is connected as source follower with3 wires to preamp.

MS 2 Mic Splitter: Send signal from1-microph1-to two mixers, product datasheet with circuit diagram in PDF format

MS 82P Microphone Splitter With Phantom Power Buss: 8 channel microph1-splitter that can inject phantom power to microphone, product datasheet with circuit diagram in PDF format

Mustage Microphone Preamp:

Parabolic dish mic amplifier :

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 and should be housed in a waterproof enclosure with the rest of the circuit.

Portable Microphone Preamplifier: High headroom input circuitry. 9V Battery powered.

Preamplifier Computer Microphone: adapting electret microphone to soundcards with dynamic microphone inputs

Preamplifier for Microphone or guitar use: suitable for guitar or microphone use.

Radio Shack Pressure Zone Microphone (PZM) Modifications:

Rane MS 1b Microphone Preamplifier Circuit Diagram: This is a circuit diagram of a commercial high quality balanced microph1-preamplifier. This document is in PDF format.

Solid State Microphone Preamp:

Sony C 37Condenser Microphone: information with circuit diagram

Speaker Microphone: circuit that allows you to use a cheap loudspeaker as a poor microph1

Theory & Construction of Mic "Splitters":

Two wire Remote Microphone Amplifier :

Two Wire Remote Microphone Amplifier: uses special amplifier module from Op-Amp Labs

Underwater Microphone:

Vacuum Tube Microphone Preamp / Direct Box Project: from January1997 EQ Column, includes phantom power supply

Voice Over Circuit: Switches automatically from sound source to microph1-when enough sound comes in from microphone.

Wireless Microphone #1:

Wireless Microphone Transmitter: