This guide shows how to connect the Adafruit Electret Microphone Amplifier to measure sound levels with your Arduino.

The Microphone Amplifier mates an with a  optimized for use in microphone pre-amplifier applications.  The flexible supply voltage and and adjustable gain make this module adaptable to a wide variety of audio applications.


  • Supply Voltage: 2.4v-5v
  • Output: Rail-to-Rail - up to to 5vp-p
  • Frequency Response: 20Hz - 20 KHz
  • Adjustable Gain 25x-125x
This guide was first published on Jan 13, 2013. It was last updated on Jan 13, 2013. This page (Overview) was last updated on Mar 02, 2020.