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 […]