MAX4466 Microphone Amplifier Module with AGC for Arduino Projects
MAX4466 Electret Microphone Amplifier Module with AGC
The MAX4466 module is a compact electret microphone amplifier with adjustable gain and built-in AGC, providing clean audio output for Arduino, ESP32, and other microcontroller projects.
Key Specifications
| Supply Voltage | 2.4 V to 5.5 V DC – Confirmed from manufacturer datasheet |
| Gain Range | 25× to 125× (adjustable via onboard trim pot) – Typical for this component category |
| Output Type | Analog, AC‑coupled – Confirmed from manufacturer datasheet |
| Frequency Response | 20 Hz to 20 kHz – Typical for this component category |
| Signal‑to‑Noise Ratio | >60 dB (A‑weighted) – Typical for this component category |
| Onboard Microphone | Electret condenser, omnidirectional – Confirmed from manufacturer datasheet |
| Module Dimensions | 22 mm × 14 mm (approx) – From user reports and common usage |
| Current Consumption | <3 mA – Inferred from similar module designs |
What You Can Build With This
- Sound‑activated LED: Create a beginner‑friendly Arduino project that lights up LEDs when you clap or speak.
- Wi‑Fi noise monitor: Use an ESP32 to stream live sound levels to a Blynk dashboard for smart room monitoring.
- Audio visualizer: Connect to a Raspberry Pi (with external ADC) and run a Python script to plot real‑time waveforms.
- Clap switch (CBSE Class 11‑12): Build a practical physics investigation demonstrating sound‑triggered circuits, perfect for ATL Tinkering Labs.
- Smart India Hackathon project: Integrate into an assistive device that recognizes alarm sounds for hearing‑impaired individuals.
Compatibility
| Platform | Compatible | Connection | Library / Method |
|---|---|---|---|
| Arduino Uno R3 | Yes | OUT → A0 | analogRead() |
| Arduino Nano | Yes | OUT → A0 | analogRead() |
| Arduino Mega 2560 | Yes | OUT → A0 | analogRead() |
| ESP8266 NodeMCU | Yes with condition | OUT → A0 (0‑1 V input) | analogRead(); may need voltage divider |
| ESP32 Dev Board | Yes | OUT → any ADC pin (e.g., 34) | analogRead() |
| Raspberry Pi Pico | Yes | OUT → GP26 (ADC0) | MicroPython ADC |
| Raspberry Pi 4 / 5 | No | N/A | Requires external ADC (e.g., MCP3008) |
Wiring and Interface Notes
Connect VCC to a 3.3 V or 5 V supply, GND to ground, and OUT to the analog input of your microcontroller. The onboard trim potentiometer lets you adjust gain from 25× to 125× — turn clockwise to increase sensitivity. For best results, keep wires short and use the onboard voltage regulator to avoid power‑supply noise in your audio signal.
Frequently Asked Questions
My MAX4466 output seems noisy, how do I fix it?
Ensure a clean power supply and use short, shielded cables. Adjust the gain trim pot to avoid clipping and keep the module away from noisy components like motors.
Can I use this module for voice recognition with Raspberry Pi?
Yes, but you’ll need a USB sound card or an external ADC since the Raspberry Pi lacks analog inputs. The module provides good analog output for sampling.
What you can build with this
Shipping Information
- Prepaid Orders: ₹75 for orders up to ₹999, FREE shipping above ₹999
- COD Orders: ₹125 shipping + ₹50 COD fee = ₹175 total
- Delivery Timeline: Dispatch in 1-2 days, delivery in 2-7 days depending on location
Returns & Warranty
- 7-Day Return: Manufacturing defects only (approval required)
- Warranty: 7 days from delivery
- Non-Returnable: Batteries, consumables, cut wires, clearance items