SW-420 Vibration Sensor

The SW-420 Vibration Sensor Module is a compact and highly sensitive digital sensor used to detect vibrations, shocks, and tilts. It is based on the SW-420 normally closed type vibration switch and an LM393 voltage comparator, which provides a clean digital output signal. When the module detects vibration or a tilt beyond a set threshold, the output goes low (0V), triggering an alert or action in your electronic circuit. This module is non-directional, meaning it responds to vibrations from any direction, and is often waterproof, making it suitable for various environments. It is widely used in security systems (like anti-theft alarms), industrial equipment monitoring, smart home automation (e.g., detecting a knocking on a door), and interactive electronic projects. With a wide operating voltage range of 3.3V to 5V and low current consumption, it integrates seamlessly with popular microcontrollers like Arduino, Raspberry Pi, and ESP32. Choose this sensor for its reliability, ease of use, and versatility in detecting motion and mechanical disturbances.