SW-1801P Vibration Sensor Module – 4-Pin Normally Open Shock Sensor The SW-1801P vibration sensor module is a high-sensitivity detection module designed to identify vibration, shock, or movement in electronic projects. Featuring a normally open (NO) vibration switch, it activates when motion is detected, making it ideal for alarm systems and motion-triggered applications. Equipped with an onboard comparator, this module delivers a clean and stable digital output signal that can be easily interfaced with microcontrollers such as Arduino. Key Features: SW-1801P vibration switch – high-sensitivity motion detection Normally open design – activates only when vibration is detected 4-pin interface – easy integration into circuits Digital output (HIGH/LOW) – simple connection to microcontrollers Onboard comparator (LM393) – stable and clean signal output Wide voltage range – operates from 3V to 5V Mounting hole – easy installation on projects How It Works: No vibration → circuit remains open (no trigger) Vibration detected → internal contact closes momentarily → output signal changes This makes it ideal for detecting knocks, movement, or shocks in real-time. Applications: Anti-theft and alarm systems Vibration and motion detection projects Smart cars and robotics Earthquake or impact detection DIY electronics and Arduino projects Specifications: Model: SW-1801P Operating Voltage: 3V–5V DC Output Type: Digital (0/1 signal) Sensor Type: Normally open vibration switch Comparator: LM393 PCB Size: Approx. 3.1 × 1.4 cm Package Includes: 1 × SW-1801P Vibration Sensor Module (4-Pin)
