SW-520D Digital Tilt Sensor Module
High-Sensitivity Inclination Detection for Arduino and DIY Projects
The SW-520D tilt sensor module detects angular changes and vibrations using a metal ball mechanism. It outputs a digital logic signal (HIGH/LOW) when tilted beyond a threshold, making it perfect for alarm systems, smart devices, and robotic applications[citation:1][citation:2].
Simple Digital Output - Easy to read with any microcontroller
High Sensitivity & Wide Voltage Range - Operates from 3.3V to 12V[citation:11]
Operating voltage is 3.3V to 12V (module) [citation:11] with 15mA consumption [citation:6]
Adjustable sensitivity via onboard potentiometer for precise trigger angle
Not suitable as a main power switch - designed for signal triggering only [citation:3][citation:13]
Technical Specifications
| Parameter | Value |
|---|
| Sensor Type | Roller-ball tilt/vibration switch |
| Operating Voltage | 3.3V to 12V DC [citation:11] |
| Current Consumption | 15mA typical [citation:6] |
| Output Form | Digital switch output (0 and 1) [citation:2] |
| Comparator IC | LM393 [citation:2][citation:6] |
| Board Size | 37 x 14mm [citation:2] |
= Key Features =
NonMercury Design Safe and environmentally friendly alternative to mercury switches [citation:3][citation:13]
LM393 Comparator - Clean, stable output signal with strong drive capability [citation:2][citation:6]
Adjustable Sensitivity Onboard potentiometer for finetuning trigger angles [citation:1][citation:6]
Visual Indicators - Power and status LEDs for immediate feedback [citation:1]
Easy Mounting - M3 mounting hole for secure attachment to objects [citation:1][citation:2]
Sealed Construction Dustproof and moistureresistant design [citation:3][citation:4]
= Applications =
- Tilt and inclination detection for alarm systems [citation:1][citation:7]
- Smart device orientation sensing
- DIY robotics and automation
- Toy and gaming device triggers
- Anti-theft and tamper detection
Versatile Use - Reliable tilt/vibration sensing for Arduino, ESP, and PIC projects [citation:1][citation:2][citation:4]
Great Value - Complete module with adjustable sensitivity
√ M3 mounting hole for easy installation [citation:2]
√ 3-pin interface (VCC, GND, DO) for simple wiring
√ Compatible with Arduino, ESP8266, ESP32, and 8051 MCUs [citation:1]
Connection Guide
Module pinout:
- VCC: 3.3V to 12V power supply
- GND: Ground
- DO: Digital output signal
Wiring to Arduino:
- Connect VCC to 5V or 3.3V
- Connect GND to GND
- Connect DO to any digital input pin
Note: Analog output (AO) is typically not used on this module [citation:2][citation:6]
Use a pull-down resistor for stable logic levels [citation:5]
Adjust sensitivity potentiometer clockwise for higher sensitivity
Troubleshooting
No output signal:
- Check power supply voltage is within 3.3V-12V range
- Verify connections and polarity
- Adjust potentiometer if DO pin is not responding [citation:1]
Module not responding to tilt:
- Increase sensitivity via onboard potentiometer
- Ensure module is securely mounted
- Sensor output may be affected by angular velocity [citation:1][citation:15]