Arduino Alcohol Detector

Just Do Electronics February 02, 2020

Arduino Alcohol Detector

Circuit Diagram :-

Code :-

 

//prateek singh
//www.prateeks.in

#include <LiquidCrystal.h>
LiquidCrystal lcd(2,3,4,5,6,7);

#define sensor 9
#define led 13
#define buz 8
void setup() 
{
  Serial.begin(9600);
  lcd.begin(16,2);
  lcd.print("Alcohol Detector");
  lcd.setCursor(0,1);
  lcd.print("www.prateeks.in");
  delay(2000);
  pinMode(sensor, INPUT);
  pinMode(buz, OUTPUT);
  pinMode(led, OUTPUT);
  lcd.clear();
}

void loop() 
{
  float adcValue=0;
  for(int i=0;i<10;i++)
  {
    adcValue+= analogRead(sensor);
    delay(10);
  }
    float v= (adcValue/10) * (5.0/1024.0);
    float mgL= 0.67 * v;
    Serial.print("BAC:");
    Serial.print(mgL);
    Serial.print(" mg/L");
    lcd.setCursor(0,0);
    lcd.print("BAC: ");
    lcd.print(mgL,4);
    lcd.print(" mg/L        ");
    lcd.setCursor(0,1);
    if(mgL > 0.3)
    { 
      lcd.print("Drunk   ");
      Serial.println("    Drunk");
      digitalWrite(buz, HIGH);
      digitalWrite(led, HIGH);
    }
    else
    {
      lcd.print("Normal  ");
      Serial.println("    Normal");
      digitalWrite(buz, LOW);
      digitalWrite(led, LOW);
    }

    delay(100);
    
}

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