CODE :
int irsensor =2;// digital pin no.2 coonected to irsensor output pin
int led = 5;// digital pin no. 5 connected led +ve pin
int buzzer = 8 ;// digital pin no. 8 connected to +ve pin of buzzer
void setup()
{
pinMode(irsensor,INPUT);
pinMode(led,OUTPUT);
pinMode(buzzer,OUTPUT);
}
void loop()
{
int i = digitalRead(irsensor);
if(i==1)
{
digitalWrite(led,LOW);
digitalWrite(buzzzer,LOW);
}
else
{
digitalWrite(led,HIGH);
digitalWrite(buzzer,HIGH);
}
}