How to interface Vibration Sensor (SW-420) with Arduino

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Arduino Vibration Sensor (SW-420) is a high sensitivity non-directional vibration sensor. When the module is stable, the circuit is turned ON and the output is high. When the movement or vibration occurs, the circuit will be briefly disconnected and output low. You can adjust the sensitivity of this sensor with the help of a trimmer potentiometer. So Today in this tutorial I am going to show you how to use Vibration Sensor SW-420 with Arduino micro-controller.

So Today in this tutorial I am going to show you how to use Vibration Sensor SW-420 with Arduino micro-controller.

Hardware Components

Following components are required to make Vibration Sensor Module

S.NO	Component	Value	Qty
1.	Arduino Uno R3	–	1
2.	USB Cable A/B	–	1
3.	Vibration Sensor	SW-420	1
4.	Breadboard	–	1
5.	Connecting Wires	–	1

SW-420 Vibration Sensor Pinout

Pin Name	Pin Description
VCC	5V
GND	0V
D0	Digital Output
A0	Analog Output

Useful Steps

Follow all steps carefully from the video tutorial above (Highly Recommended).

STEP # 1 ( Make Vibration Sensor Connections )

VCC – To VCC of Arduino.
GND – To GND of Arduino.
D0 – To D9 of Arduino.

STEP # 2 ( Burn Code )

Copy code & upload it to Arduino Board using Arduino IDE Software

Circuit Diagram

Working Explanation

This module is a high-sensitivity non-directional vibration sensor. When the module is stable, the circuit is turned on and the output is high. When the movement or vibration occurs, the circuit will be briefly disconnected and output low. At the same time, you can also adjust the sensitivity according to your own needs.

It consists of an SW-420 vibration sensor, an LM393 comparator, an LED and a potentiometer. The threshold can be adjusted by turning the potentiometer, When it detects vibration that is above its set threshold, it will send a HIGH signal and if no vibration or below the threshold, it will send a LOW signal.

Arduino Vibration Sensor Code

int ledPin = 13;

void setup()
{     
  Serial.begin(9600);     
  pinMode(ledPin, OUTPUT);     
  pinMode(ctsPin, INPUT); 
}
  
void loop() 
{     
  int ctsValue = digitalRead(ctsPin);     
    
  if (ctsValue == HIGH) 
  {    
    digitalWrite(ledPin, HIGH);     
    Serial.println("TOUCHED");    
  }   
  else 
  {     
    digitalWrite(ledPin,LOW);     
    Serial.println("not touched");     
  }
  delay(0.9); 
}