Laser Security System

 

CODE :- 

int val;

int ldrpin=A0;

int maxval=800;

int buzzerpin=6;

void setup() {

  // put your setup code here, to run once:

pinMode(ldrpin,INPUT);

pinMode(buzzerpin,OUTPUT);

}

void loop() {

  // put your main code here, to run repeatedly:

val=analogRead(ldrpin);

 digitalWrite(buzzerpin,LOW);

if (val>maxval) {

  digitalWrite(buzzerpin,HIGH);

}

delay(100);

}