Description

MAX4466 Microphone Module with Adjustable Gain

The MAX4466 Microphone Module (GY-MAX4466) is a high-performance electret microphone amplifier designed for applications requiring clean analog audio acquisition. Built around the genuine MAX4466 low-noise operational amplifier, this module provides adjustable gain from 25x to 125x, making it ideal for voice recognition, sound detection, audio sampling, FFT analysis, and embedded audio projects.

Supporting a wide operating voltage from 2.4V to 5.5V, the module integrates seamlessly with Arduino, ESP32, Raspberry Pi, STM32, and other popular development platforms. Thanks to its excellent power-supply rejection and low quiescent current, the GY-MAX4466 delivers stable and reliable audio performance in both portable and fixed installations. Specifications and operating characteristics align with commonly documented MAX4466 breakout modules.

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Why Choose this Microphone Module?

Unlike traditional sound detection modules that only provide digital trigger outputs, the MAX4466 offers a true analog audio signal, making it suitable for advanced signal processing applications.

Key Features

• Genuine MAX4466 low-noise microphone amplifier
• Adjustable gain from 25x to 125x
• Analog audio output
• Supply voltage: 2.4V–5.5V
• Excellent Power Supply Rejection Ratio (PSRR)
• Low power consumption (<24μA quiescent current)
• Compact GY-MAX4466 breakout board
• Compatible with 3.3V and 5V systems
• Pre-soldered electret condenser microphone
• Easy three-pin connection (VCC, GND, OUT)

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Technical Specifications

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Applications of the Arduino Microphone Sensor

The Arduino Microphone Sensor is suitable for numerous embedded audio projects, including:

• Voice recognition systems
• Audio recording
• Sound level monitoring
• FFT spectrum analyzers
• Clap detection
• Voice activation
• Smart home automation
• Audio-reactive LED projects
• ESP32 sound visualization
• Raspberry Pi audio acquisition
• Environmental sound monitoring
• Robotics
• Interactive installations

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Easy Integration with Arduino, ESP32 & Raspberry Pi

 for Arduino

Connect the module directly to the Arduino analog input.

Connection

• VCC → 5V
• GND → GND
• OUT → A0

Ideal for:

• Analog sound measurement
• Voice-triggered projects
• FFT visualization
• Clap switches

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Analog Microphone Sensor for ESP32

The module works perfectly with ESP32 ADC inputs.

Recommended wiring:

• VCC → 3.3V
• GND → GND
• OUT → GPIO34 (ADC)

Suitable for:

• Audio visualization
• Spectrum analyzers
• IoT sound monitoring
• Edge AI audio preprocessing

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Module for Raspberry Pi

Since Raspberry Pi lacks an onboard analog input, pair the module with an external ADC such as MCP3008 or ADS1115 for analog signal acquisition.

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Adjustable Gain for Maximum Flexibility

One of the biggest advantages of the Adjustable Gain Microphone Module is its onboard precision trimmer.

Gain can be adjusted from:

• 25× for loud environments
• 50× for normal speech
• 75× for indoor applications
• 125× for quiet sound collection

This flexibility allows the module to perform well in various acoustic environments without changing hardware.

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Advantages of the Adjustable Gain Microphone Module

Compared with ordinary microphone modules, this module offers:

• Lower background noise
• Higher signal quality
• Better power-supply noise rejection
• Wider operating voltage
• Adjustable sensitivity
• Stable analog output
• Excellent compatibility with microcontrollers

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Package Includes

• 1 × GY-MAX4466 MAX4466 Microphone Module
• 1 × 3-Pin Header

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Learn More

Product Tutorial

Learn how to connect and program the MAX4466 with Arduino:

https://electropeak.com/learn/interfacing-max4466-microphone-module-with-arduino/

Product Demonstration Video

Watch the identical Microphone Module being tested with Arduino and an oscilloscope:

https://www.youtube.com/watch?v=z7MxxVktykA

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You may also like Powerful Arduino Development Board CH340 USB for DIY – Fondyes

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FAQ

Q1: Is this Microphone Module compatible with Arduino UNO?

Yes. The module is fully compatible with Arduino UNO, Nano, Mega, Leonardo, and other Arduino boards. Simply connect the OUT pin to an analog input (such as A0), VCC to 5V (or 3.3V where appropriate), and GND to ground.

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Q2: Can I use it with ESP32?

Absolutely. It works well with ESP32 when powered from 3.3V. Connect the analog output to an ADC-capable GPIO (for example, GPIO34) for audio sampling, sound analysis, or FFT-based applications.

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Q3: What is the difference between the MAX4466 and a digital sound sensor?

It provides a continuous analog audio signal, making it ideal for waveform analysis, voice recognition, and spectrum processing. In contrast, most digital sound sensors only output a simple HIGH/LOW trigger based on a preset sound threshold.