SW-420 Normally Closed Vibration Sensor Module | Adjustable Shock & Motion Alarm Sensor for Arduino, ESP32 & IoT Security Projects

Product Description

The SW-420 Vibration Sensor Module is a sensitive and reliable shock and vibration detection module used to trigger alarms, motion detection, and security alerts. It operates based on a normally closed vibration switch that opens momentarily when a sudden vibration or movement is detected.

Equipped with an LM393 comparator circuit, this module outputs a digital HIGH/LOW signal corresponding to vibration activity. It features adjustable sensitivity, LED indicators, and a simple 3-pin interface compatible with Arduino, ESP32, Raspberry Pi, and STM32.

Compact, durable, and easy to integrate, it’s ideal for security systems, motion alarms, industrial machines, and DIY automation projects.

Key Features

• Model: SW-420 Vibration Sensor Module

• Operating Voltage: 3.3 V – 5 V DC

• Sensor Type: Normally closed spring vibration switch

• Output Type: Digital (HIGH/LOW signal)

• Comparator IC: LM393 for stable digital output

• Adjustable Sensitivity: Onboard potentiometer

• Indicators: Power LED and output status LED

• Interface Pins: VCC, GND, DO

• Response Time: < 1 ms

• Operating Temperature: –10 °C to +70 °C

• Compatibility: Arduino, ESP32, Raspberry Pi, STM32, AVR, PIC, etc.

• Mounting: Compact PCB with mounting holes for easy installation

Advantages

• Detects vibration, motion, or shock with high sensitivity.

• Adjustable detection threshold for various applications.

• Low-power operation ideal for continuous monitoring.

• Easy 3-pin interface for plug-and-play integration.

• Excellent for security alarms, vibration triggers, and anti-theft systems.

Applications

• Anti-theft alarm systems

• Vibration or motion detection devices

• Industrial machine monitoring

• Earthquake or shock detection prototypes

• Arduino & IoT smart-alert projects