Phantom Powered Microphone Preamplifier – Low Noise – Professional Quality
https://www.electronics-lab.com/project/phantom-powered-microphone-preamplifier-low-noise-professional-quality/
The project presented here is a professional quality Phantom powered Microphone pre-amplifier. The project is built using the INA163 chip from TI. The Chip is a very low-noise, low-distortion, monolithic instrumentation amplifier. R2 and R3 provide a current path for a conventional 48V phantom power source for a remotely located microphone. A slide switch SW1 […]
Piezo Element Amplifier for Guitar and Violin
https://www.electronics-lab.com/project/piezo-element-amplifier-for-guitar-and-violin/
The board presented here is a preamplifier for contact microphones that are used for amplifying the sound of musical instruments which do not contain electrical pickups, such as guitar and violins. Most contact microphones use a piezo element to convert vibration in the body of the musical instrument to a voltage. The circuit is built […]
Hi-End Microphone Preamplifier with Variable Compression, Noise Gating and Adjustable Gain
https://www.electronics-lab.com/project/hi-end-microphone-preamplifier-with-variable-compression-noise-gating-and-adjustable-gain/
The circuit shown here is a complete microphone signal conditioning system based on a single SSM2166 integrated circuit. Designed primarily for voiceband applications, this integrated circuit provides amplification, RMS detection, limiting, variable compression, and downward expansion. An integral voltage-controlled amplifier (VCA) provides up to 60dB of gain in the signal path with approximately 30kHz bandwidth. […]
Pre-Amplifier for MEMS Microphone
https://www.electronics-lab.com/project/pre-amplifier-for-mems-microphone/
This is a low-cost, small-size audio pre-amplifier for MEMS microphone, OPAMP-based circuit amplifies the low-level analog signal coming from MEMS microphone to the desired level required for the next stage which is an audio amplifier, basically microphone level to line level. Resistor R4 and R7 are used to generate a voltage reference to bias the […]
Low Voltage Microphone Preamplifier with Variable Compression and Noise Canceling
https://www.electronics-lab.com/project/low-voltage-microphone-preamplifier-with-variable-compression-and-noise-canceling/
This is a complete microphone signal conditioning project. Designed primarily for voice-band applications, this project provides amplification, limiting, variable compression, and noise gate. User-adjustable compression ratio, noise gate threshold, and two different fixed gains optimize circuit operation for a variety of applications. This is a complete and flexible solution for conditioning condenser microphones for personal […]
Microphone Preamplifier – Sound Sensor
https://www.electronics-lab.com/project/microphone-preamplifier-sound-sensor/
This is an easy to construct dual-stage microphone pre-amplifier. The project can be used as a sound sensor or microphone pre-amplifier. The 1st op-amp pre-amplify the very low-level signal coming from the condenser microphone and 2nd op-amp provides more boost to the audio signal. The pre-amplifier is an important building block for many audio communication […]
Phantom Powered Microphone Pre-Amplifier using SSM2019
https://www.electronics-lab.com/project/phantom-powered-micro-phone-pre-amplifier/
The project published here is based on SSM2019 IC which is a latest-generation Pro audio preamplifier. A female XLR connector is provided to connect differential Micro-phone. Circuit also provides Phantom power input, combining SSM preamplifier design expertise with advanced processing. The result is excellent audio performance, the attached trimmer potentiometer helps to adjust the output […]
Differential Microphone Pre-Amplifier
https://www.electronics-lab.com/project/differential-microphone-pre-amplifier/
The project shown here is a microphone preamplifier that provides high quality amplification, optimized for use in computers, media and mobile applications. The pre-amplifier provides a differential input stage, making the device particularly effective when layout constraints force the microphone amplifier to be physically remote from the ECM microphone. This project features adjustable gain […]
Low noise Mini Electret Microphone PreAmplifier
https://www.electronics-lab.com/project/low-noise-mini-electret-microphone-preamplifier/
This single supply microphone pre-amplifier amplifies the output signal of an electret capsule microphone to audio line levels. An op-amp is used as a trans-impedance amplifier to convert the output current from the microphone into a signal-level voltage. The circuit works with 9V so it is a good choice for battery-operated systems. Features Supply 9V […]