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In this tutorial, I show you, How To make a Simple laser Security System with Arduino.

Step 1: ​You Will Need:

Hardware

  • LED
  • Laser
  • Photoresistor
  • Piezo Buzzer
  • Breadboards
  • Arduino uno
  • Resistor 10Ω Resistor
  • 220Ω Resistor for led.
  • jumper wire

Software

  • Arduino IDE

Step 2: Watch the Video Tutorial

Step 3: Schematics

Breadboard:-----------Arduino Pins:---------Breadboard

Buzzer--------------------Pin9------------------------Gnd

Laser-----------------------5v--------------------------Gnd

Resistor------------------A0---------------------------Gnd,Photocell

Photocell-------------------5v-------------------------Resistor

Led----------------------Pin6,Pin7

Note:I've used 220 Ohm resistors in the past for all of my LEDs.

Step 4: Arduino Sketch

int sensorPin=A0;

int sensorValue=0; int piezoPin=9;

void setup(){ pinMode(sensorPin,INPUT); pinMode(7,OUTPUT); pinMode(6,OUTPUT); pinMode(piezoPin,OUTPUT); digitalWrite(7,HIGH); digitalWrite(6,LOW); }

void loop(){ sensorValue=analogRead(sensorPin); if(sensorValue<=1000) {digitalWrite(piezoPin,HIGH); {tone(9,3047,400); noTone(8); } digitalWrite(7,HIGH); } else {digitalWrite(piezoPin,LOW); digitalWrite(7,LOW); } sensorValue=1000; }

<p>if ever i am using a 220v buzzer and Ldr and a led i want to make an laser security system but i dont know can you please help me</p>
<p>Can I use a Photodiode instead of an LDR?</p>
<p>Set the sensor value to 30 at both lines when I used a normal LDR (mostly in kits or as board)</p>

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