Sound detection with LED indicator This module uses an electret condenser microphone and an LM393 comparator to detect ambient sound vibrations such as claps or knocks. When sound is detected, it outputs a lowlevel digital signal and activates an indicator LED for visual confirmation. Adjustable sensitivity and easy calibration Features a builtin blue digital potentiometer for finetuning sensitivity. You can adapt the module to different environments and reduce false triggers from background noise. Wide voltage compatibility and low power design Operates from 3.3V to 5V DC, making it directly compatible with Arduino, Raspberry Pi, and other microcontrollers without extra power regulation. Digital output for easy integration Provides a simple digital /LOW output for straightforward programming and connectivity, suitable for beginners and DIY projects. Practical applications Ideal for acousticcontrolled lights, smart home alarms, and interactive soundactivated systems.