The MAX4466 Electret Microphone Amplifier Module is a high-quality microphone amplifier board designed to capture clear audio signals for embedded and DIY sound projects. It uses the MAX4466 low-noise op-amp with an onboard electret microphone and adjustable gain control, making it perfect for voice detection, sound level monitoring, audio recording, and Arduino/ESP32 microphone input projects. This module provides an analog output signal that can be easily read by any microcontroller ADC pin.
Core Module Specifications
• Module Type: Electret microphone amplifier module
• Amplifier IC: MAX4466
• Microphone Type: Electret condenser microphone
• Output Signal: Analog audio waveform
Electrical & Interface
• Operating Voltage: 2.4 V – 5.5 V DC
• Output Type: Analog (OUT pin)
• Interface Pins: VCC, GND, OUT
• Gain Adjustment: Onboard potentiometer
• Low Noise Performance: Suitable for voice and audio capture
Performance Characteristics
• High sensitivity for sound detection
• Low noise amplification for clear output
• Adjustable gain for different sound levels
• Stable output for ADC sampling
Physical Characteristics
• Module Type: Compact microphone breakout board
• PCB Color: Purple (variant dependent)
• Mounting Holes: Provided for easy installation
• Lightweight and portable design
Compatibility
• Arduino Uno / Nano / Mega
• ESP8266 / ESP32 (ADC scaling required)
• Raspberry Pi (with external ADC)
• Sound detection and audio input projects
• DIY voice and noise monitoring systems
Key Advantages
• Clean analog output for audio processing
• Adjustable sensitivity using gain control
• Works with 3.3 V and 5 V systems
• Compact and easy to integrate
Technical Insights
• Output is centered around mid-supply voltage
• Not a digital microphone (requires ADC reading)
• Best used with sampling + filtering in software
• Keep module away from strong EMI sources for clean audio
Applications
• Voice detection and clap switch projects
• Audio level / sound monitoring
• DIY recording and sound visualizers
• Smart home sound-trigger automation
• Educational audio signal processing projects
Pro Tip
• Start with medium gain to avoid clipping
• Use averaging or envelope detection for sound level
• Keep wires short to reduce noise pickup
• Use stable power supply for best performance
Package Includes
• 1 × MAX4466 Electret Microphone Amplifier Module
• Header pins (if included)