With this module you can easily measure sound with an analog pin on your Arduino or other microcontroller. The module has an automatic gain/amplification (ACG) of the microphone: The module amplifies sounds with a low volume more, and sounds with a higher volume less.


  • Supply voltage: 2.4-5.5V DC
  • Output voltage: ~0-2.45V (1.25V average)
  • Frequency range: 20-20,000Hz
  • Adjustable maximum gain:
    • 60dB (Gain pin floating)
    • 50dB (Gain pin connected to GND)
    • 40db (Gain pin connected to Vdd)
  • Adjustable attack/release ratio:
    • 1: 4000 (AR pin floating)
    • 1: 2000 (AR pin connected to Vdd)
    • 1: 500 (AR pin connected to GND)
  • Two 2mm holes for mounting
  • PCB dimensions: 25.4 x 14.1mm


  • Vdd: Supply voltage
  • GND: Ground/min
  • Gain: Pin to set the maximum gain (see above)
  • Out: Output of the module
  • AR: Pin to set the attack/release ratio

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MAX9814 Electret Microphone Amplifier

  • Product Code: 0383
  • Availability: In Stock
  • 4.90€

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Tags: Electret, microphone, amplifier