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KY-002 Vibration Switch Module

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 Vibration Switch Module Circuit Board

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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