3-Pin Sound Sensor Module (Black PCB)

GST

The 3‑Pin Sound Sensor Module is a compact sound detection module designed to detect sound levels in the environment. It provides a digital output signal when sound exceeds a set threshold and can easily interface with boards such as Arduino Uno R3, Arduino Nano, and ESP32 Development Board.

The 3-Pin Sound Sensor Module uses an onboard electret microphone to detect sound vibrations from the surrounding environment. The signal is processed through a comparator circuit, which generates a digital HIGH or LOW output depending on the detected sound level.

The module includes an adjustable potentiometer that allows you to control the sensitivity of the sound detection. When the sound intensity crosses the set threshold, the output pin changes state, which can be used to trigger events in microcontroller projects.

Because of its simple 3-pin design, the sensor is extremely easy to connect and ideal for beginners as well as embedded system projects. It is commonly used in clap switches, sound-activated lighting systems, alarm systems, and automation projects.

Key Features

Detects sound using an onboard microphone
Simple 3-pin interface for easy connection
Digital output signal
Adjustable sensitivity using onboard potentiometer
Compact black PCB design
Compatible with Arduino, ESP32, ESP8266, and other microcontrollers

Technical Specifications

Parameter	Value
Operating Voltage	3.3V – 5V
Output Type	Digital
Sensor Type	Electret Microphone
Comparator	Onboard comparator circuit
Sensitivity	Adjustable via potentiometer