How to interfacing MQ3 alcohol sensor with arduino uno

MQ3 ALCOHOL SENSOR

Arduino code:
#include <LiquidCrystal.h>

#define gas_Pin 7

// initialize the library by associating any needed LCD interface pin

// with the arduino pin number it is connected to

const int rs = 13, en = 12, d4 = 11, d5 = 10, d6 = 9, d7 = 8;

LiquidCrystal lcd(rs, en, d4, d5, d6, d7);

int gas_value;

void setup() {

  // set up the LCD's number of columns and rows:

  lcd.begin(16, 2);  

  pinMode(6,OUTPUT);

}

void loop()

{

  gas_value = digitalRead(gas_Pin); 

  if(gas_value==1)

  {

   digitalWrite(6,HIGH);

   lcd.setCursor (0, 1);

   lcd.print("ALCOHOL DEDUCTED");

   lcd.display();

   }

   else

   {

    digitalWrite(6,LOW);

    lcd.setCursor (0, 1);

    lcd.print("NO ALCOHOL");

    lcd.display();

   }

   delay(1000); 

   lcd.clear(); 

}

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MQ3 ALCOHOL SENSOR

                                                      MQ-3 Sensor (Alcohol, Ethanol, Smoke)

• When it comes to detecting a particular Gas the MQ series Gas sensors are the most commonly used ones. 
• Using an MQ sensor it detects a gas is very easy. You can either use the digital pin or the analog pin to accomplish this.

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How to interfacing  alcohol sensor MQ3 with arduino uno

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Click below link for interface Keypad with Arduino UNO

https://youtu.be/cnPb4pObkXc

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https://youtu.be/ALm-okkKRPY

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Click below link for the temperature sensor

https://youtu.be/1GJC_6eF7Xg

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https://youtu.be/jiJAhxa687s

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