Best Arduino Project For Beginner And Advanced: Arduino Board Open Source Projects for Beginners by Agus Yulianto

Author:Agus Yulianto [Yulianto, Agus]
Language: eng
Format: azw3
Published: 2017-10-14T04:00:00+00:00

Program.

#include<LiquidCrystal.h>

int mq2=A0;

int rel=13;

int buz=10;

int d;

float p;

LiquidCrystal lcd(12, 11, 5, 4, 3, 2);

void setup()

{

pinMode(rel,OUTPUT);

pinMode(buz,OUTPUT);

digitalWrite(rel,LOW);

digitalWrite(buz,LOW);

lcd.begin(16,2);

}

void loop()

{

d=analogRead(mq2);

lcd.setCursor(0,0);

lcd.print("LPG SENSOR");

if(d<60)

{

p=0;

}

else

{

p=(d-60)/9.64;

}

lcd.setCursor(0,1);

lcd.print(p);

lcd.setCursor(5,1);

lcd.print("%");

if(p>=30)

{

digitalWrite(rel,LOW);

digitalWrite(buz,HIGH);

lcd.setCursor(9,1);

lcd.print("TRIP");

}

else

{

digitalWrite(rel,HIGH);

digitalWrite(buz,LOW);

}

delay(500);

lcd.clear();

}

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