Arduino Alcohol Detector | MQ-3 Sensor

Arduino Alcohol Detector | MQ-3 Sensor

CIRCUIT DIAGRAM :

MATERIALS :

Arduino NANO / UNO 
MQ-3 Alcohol sensor 
PCB 
Buzzer 
LED 
PCB Header 

CODE :

//Eliyas Science Info
//Alcohol Detector
const int MQ3=0;
const int Buzzer=8;
const int LED=9;
int value;

void setup() {
 Serial.begin(9600);
 pinMode(MQ3, INPUT);
 pinMode(Buzzer, OUTPUT);
 pinMode(LED, OUTPUT);
 digitalWrite(Buzzer,LOW);
 digitalWrite(LED,LOW);

}

void loop()
{
 value= analogRead(MQ3);
 Serial.println(value);
  
 if(value>440)
 {
  digitalWrite(Buzzer,HIGH);
  digitalWrite(LED,HIGH);
 }else{
  digitalWrite(Buzzer,LOW);
  digitalWrite(LED,LOW);
 }

 delay (500);
}

ELIYAS SCIENCE INFO ©

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