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SW420 SW-420 Tilt Motion Sensor

K-TECHNICS
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KSh200.00

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The SW-420 is a high-sensitivity, normally-closed (NC) digital vibration and motion sensor module widely used in the maker community for Arduino, Raspberry Pi, and ESP8266 projects. It functions primarily as a non-directional shock and shake detector rather than a true multi-angle geometric tilt sensor. 
⚙️ Technical Specifications
Parameter  Specification
Operating Voltage 3.3V to 5V DC
Output Type Digital signal (0 or 1)
Current Drive Capacity >15 mA
Onboard Comparator LM393 voltage comparator
Default Circuit State Normally Closed (NC)
Dimensions 3.2cm x 1.4cm
🔍 How it Works
  1. Idle State: When the module is perfectly stable, the internal spring mechanism remains in contact, closing the circuit. The module outputs a logic LOW (0) signal, and the onboard status LED lights up. 
  2. Triggered State: When a vibration, bump, or hard tilt occurs, the internal connection breaks momentarily. The onboard LM393 comparator pulls the output to a logic HIGH (1), and the status LED shuts off. 
  3. Sensitivity Tuning: You can adjust how easily the sensor triggers by rotating the onboard blue potentiometer. Turning it balances the comparator threshold against ambient noise. 
📌 Pin Configuration
  • VCC: Connects to the microcontroller’s 3.3V or 5V power supply line.
  • GND: Connects to the system ground line.
  • DO (Digital Output): Connects to any digital input pin on your microcontroller to detect state changes. 
🛠️ Common Applications
Because the sensor operates on rapid, momentary state breaks, it is ideal for: 
  • Anti-theft alarms for cars, motorcycles, and bicycles.
  • Door knock detection or home window break alerts.
  • Shake-to-wake interactive mechanisms in smart gadgets and toys.

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Please note, a delivery fee of €4.99 applies for orders under €50. For those in remote areas, be aware that our couriers may apply an extra surcharge. This additional fee helps cover the costs of transporting your items to harder-to-reach locations.