The SW520D Tilt Sensor Module is a simple motion and angle detection module used to sense tilt, vibration, or orientation changes in electronic projects. It uses the SW520D ball-type tilt switch which triggers when the module is tilted or shaken, producing a digital output signal. With an onboard LM393 comparator and adjustable sensitivity, this module is perfect for anti-theft alarms, orientation detection, motion-triggered automation, and Arduino tilt sensor projects.
Core Sensor Specifications
• Sensor Type: Ball tilt switch sensor
• Sensor Model: SW520D
• Detection Type: Tilt / vibration / motion detection
• Output Type: Digital trigger output (HIGH/LOW)
Electrical & Interface
• Operating Voltage: 3.3 V – 5 V DC
• Comparator IC: LM393
• Output Pin: DO (digital output)
• Interface Pins: VCC, GND, DO
• Sensitivity Adjustment: Onboard potentiometer
• Indicator LEDs: Power LED + Output LED
Performance Characteristics
• Detects tilt and sudden movement quickly
• Adjustable trigger threshold for stable output
• Low power consumption
• Suitable for simple ON/OFF motion detection
Physical Characteristics
• Module Type: Compact sensor board
• Sensor Element: SW520D cylindrical tilt switch
• Build: Durable PCB with mounting hole
• Lightweight and easy to install in small projects
Compatibility
• Arduino Uno / Nano / Mega
• ESP8266 / ESP32
• Raspberry Pi GPIO
• STM32 boards
• DIY alarm and motion projects
Key Advantages
• Easy tilt detection without complex sensors
• Adjustable sensitivity using onboard trimpot
• Digital output for direct microcontroller reading
• Works with both 3.3 V and 5 V systems
Technical Insights
• Output changes when the internal metal ball shifts position
• Best used for basic tilt/motion detection (not precise angle measurement)
• Avoid constant vibration environments for stable results
• For accurate angle sensing, use accelerometers like ADXL345
Applications
• Anti-theft and movement alarm systems
• Tilt-based switch control
• Fall detection prototypes
• Orientation detection in DIY devices
• Vibration trigger for automation projects
Pro Tip
• Adjust the potentiometer until the DO LED triggers reliably
• Mount module firmly to reduce false triggers
• Use software debounce for stable readings
• Ideal for simple safety and alarm circuits
Package Includes
• 1 × SW520D Tilt Sensor Module