SW-420 Vibration Switch Module

SW-420 Vibration Switch Module

The SW-420 Vibration Switch Module is a simple yet effective sensor used to detect vibration or shock in electronic systems. It’s based on the SW-420 spring-type vibration sensor and an onboard comparator circuit, usually built around the LM393 IC, to provide digital output signaling when movement or shaking is detected.

This module works by sensing mechanical vibrations. Inside the SW-420 sensor is a spring and metal contact. When the module is still, the spring remains in place, and the circuit stays open. However, when vibration or movement occurs, the spring moves and briefly makes contact with the terminal, closing the circuit and generating a signal.

The module operates on a voltage range of 3.3V to 5V, making it compatible with a wide range of microcontrollers like Arduino, Raspberry Pi, ESP8266, and others. The output is digital – it sends a LOW signal when vibration is detected and HIGH when it’s still. It also includes an onboard potentiometer to adjust the sensitivity according to the application’s needs.

A built-in LED indicator lights up when vibration is detected, providing real-time feedback. Its compact size, low cost, and ease of use make it an excellent choice for both beginners and advanced electronics enthusiasts.

The SW-420 module is widely used in security systems and automation, where detecting movement or shock is crucial. Its ability to turn physical motion into a digital signal makes it highly useful in various DIY and embedded systems projects.

Features: 

• Detects Shocks and Vibrations: Instantly senses motion, shake, or knocks—ideal for triggering alerts or responses in your project.
• Adds Interactivity: Enables physical interaction with devices (tap or shake to trigger), perfect for toys, alarms, or smart devices.
• Enhances Security: Can be used in anti-theft systems to detect unauthorized movement or tampering.
• Customizable Sensitivity: Easily adjust how much vibration is needed to trigger a response using the onboard potentiometer.
• Visual Feedback: Built-in LED turns on when vibration is detected, making testing and debugging easier.
• Quick Digital Integration: Sends simple HIGH/LOW signals—ideal for triggering other components like buzzers, lights, or relays.
• Reliable Motion Activation: Offers a dependable method to activate circuits only when physical movement occurs.
• Ideal for Automation: Can help create systems that respond to knocks, taps, or vibration patterns without buttons or remotes.

Specifications:

Usage:

Hardware components

• Arduino Uno R4 or R3 board * 1
• Vibration Sensor Module(SW-420) * 1
• Jumper Wires

Circuit Assembly

Applications:

• Anti-theft and security systems.
• Earthquake or tremor detectors.
• Smart home automation.
• Vibration-based alarms.
• Interactive toys and gadgets.
• Machine and motor monitoring.
• Fitness or activity trackers.
• Window or door knock sensors.
• Vibration-activated lighting.
• Project input alternative.

Package Included:

• 1x SW-420 Vibration Switch Module

Datasheet:

SW-420 Vibration Switch Module