Attributes

Brand	-
Category	Robotics / STEM Teaching Tools / Sensors
Origin	-
Interface Type	3-Pin / 4-Pin Compatible
Operating Voltage	3.3V - 5V DC
Output Signal	Analog (AO) and Digital (DO)
Sensitivity Adjustment	Adjustable via Potentiometer
Microphone Type	Electret Condenser
Detection Range	Approx. 0-6 Meters (Environment Dependent)
PCB Dimensions	32mm x 16mm x 8mm
Mounting Holes	3mm Diameter
Compatible Platforms	Arduino, Raspberry Pi, ESP32, STM32
Primary Application	Noise Level Monitoring & Sound Trigger Projects

6 reviews

Anonymous

Mar 31, 2026

Rating: 5/5

Perfect for Arduino projects

This module works flawlessly with my Arduino Uno. The sensitivity potentiometer makes it easy to calibrate for different room noise levels. Great value for the price.

Anonymous

Mar 27, 2026

Rating: 5/5

Great for learning

Bought this for a university project on environmental noise monitoring. It integrates easily with Python on Raspberry Pi. Highly recommended for students.

Anonymous

Mar 23, 2026

Rating: 4/5

Good sensor, clear instructions needed

The hardware quality is solid and the dual output (analog/digital) is very useful. I wish the included documentation had more code examples, but online resources filled the gap.

Anonymous

Mar 19, 2026

Rating: 3/5

Works but sensitive to voltage spikes

The module functions as described, but I noticed some erratic readings when powered directly from a noisy USB port. Using a regulated 5V supply solved the issue.

Anonymous

Mar 19, 2026

Rating: 4/5

Solid build quality

The PCB looks professional and the soldering points are clean. It picks up sound well, though you need to shield it if using it in very windy outdoor environments.

Anonymous

Mar 04, 2026

Rating: 5/5

Responsive and accurate

I used this to build a simple clap-switch circuit. The response time is incredibly fast, and the digital output threshold is stable once adjusted.

5 FAQ

Q: Does this work with ESP8266 NodeMCU?

A: Absolutely. Since the ESP8266 operates at 3.3V logic and this module supports 3.3V-5V input, they are fully compatible. Just ensure you connect the pins correctly.

Q: Is the 3-pin and 4-pin interface interchangeable?

A: Yes, the module supports both. The 3-pin mode typically uses VCC, GND, and AO (Analog Out), while the 4-pin mode adds DO (Digital Out) for threshold-based triggering.

Q: Can this module measure exact decibel values?

A: This module provides an analog voltage proportional to sound intensity, which can be mapped to decibels via calibration code. However, it is not a pre-calibrated professional dB meter out of the box.

Q: What is the maximum operating voltage?

A: The module is designed to operate safely between 3.3V and 5V DC. Exceeding 5V may damage the onboard components.

Q: How do I adjust the sensitivity?

A: There is a blue potentiometer on the board. Turn it clockwise to increase sensitivity (detect quieter sounds) and counter-clockwise to decrease it. Use a small screwdriver for adjustment.

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