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 Pin Configuration Pin Description VCC Power Supply (3.3V – 5V) GND Ground OUT Digital Output What’s in the Box 1 × 3-Pin Sound Sensor Module (Black PCB)
