KY-002 Vibration Switch Module: A Guide for Arduino User


The KY-002 module is a Vibration Switch that allows you to use a microcontroller like Arduino, ESP32, and Raspberry Pi to detect impacts, shaking and knocking. It has a spring mechanism that senses the vibration and momentarily closes the circuit by the spring which sends a small high signal.

Here, you will get detailed information about this vibration switch module circuit board, like specifications, pinout, circuit & connection diagram, and how to interface with Arduino.

    KY-002 Module Specifications

    • Type: Capacitive Vibration Sensor
    • Operating Voltage: 1.5V to 12V
    • Max current: 10mA
    • Board Dimantions: 18.5mm x 15mm

    KY-002 Module Pinout

    The module has 3 male header pins those are -

    1. Pin (S): Signal
    2. Pin (Middle): +5V
    3. Pin (-): GND

    KY-002 Module Circuit Diagram

    Schematic of the ky-002 vibration switch module circuit is shown below.

    KY-002 Module Interfacing with Arduino

    Connection diagram of the KY-002 vibration switch module with an Arduino is shown below.

    Connect the power pin (middle) and ground pin (-) of the ky-002 module to +5V and GND on the Arduino, respectively. The module signal pin (s) connect to digital pin 3 on the Arduino.

    Arduino Source Code

    The following Arduino sketch for KY-002 Vibration Switch Module.

    Set the LED on Arduino pin 13 as the output and the sensor pin of the module as the input. Using this interface produces a shock flasher. The LED will flash when the ky-001 module is detected knocked or shaked.

    int Led = 13; // Define LED on Arduino interface
    int vibration = 3; // Define the KY-002 module interface
    int val; // Define a numeric (boolean) variable val
    void setup ()
      pinMode (Led, OUTPUT) ; // Define Arduino LED as output interface
      pinMode (vibration, INPUT) ; // Input interface defines KY-002 module
    // Start the main program loop
    void loop ()
      val = digitalRead (vibration) ; // Read the value from KY-002 module
      if (val == HIGH) // When the KY-002 vibration switch module detects a signal, LED flashes
        digitalWrite (Led, LOW);
        digitalWrite (Led, HIGH);

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