SW420 Vibration Sensor Module

In stock

The SW420 Vibration Sensor Module is a versatile and widely used component for detecting vibrations, shocks, and tilting. It’s a digital sensor, meaning it provides a simple high or low output to indicate the presence or absence of vibration.

Brands:

How It Works

Inside the sensor is a conductive spring and a center pin. Normally, they are in contact (closed circuit). A vibration causes them to separate briefly, which is detected by an LM393 comparator chip on the module. You can adjust the sensitivity using the onboard potentiometer.

Key Specifications

Operating Voltage: 3.3V to 5V DC
Output: Digital (HIGH/LOW)
Pins: VCC (Power), GND (Ground), DO (Digital Out)

⚠️ Cautions

Voltage: Do not exceed the 5V operating limit.
Polarity: Connecting VCC and GND incorrectly can damage the module.
Sensitivity: Adjust the onboard potentiometer gently to set the vibration threshold.
Environment: Avoid places with constant vibrations to prevent false alarms.
Debouncing: In code, you may need to account for “bouncing” where one vibration can cause multiple rapid signals.