Experiment4 Door bell.txt

boolean val= 0;
boolean wal= 0;

void setup()
{
  pinMode(4,OUTPUT);
  pinMode(8,INPUT);
  pinMode(11,INPUT);
  pinMode(12,OUTPUT);
}

void loop()
{
  
  val = digitalRead(11);
  wal = digitalRead(8);
  if(val==HIGH)
  {
    digitalWrite(4,HIGH);
   delay(40);
   digitalWrite(4,LOW);
   delay(40);
  }
  else
  {
    digitalWrite(4,LOW);
  }
  
  
  if(wal==HIGH)
  {digitalWrite(12,HIGH);
   delay(20);
   digitalWrite(12,LOW);
   delay(20);
    
  }
  else
  {
    digitalWrite(12,LOW);
  }
  
  
   
}