Laser Security Alarm System (DUAL MODE)

When something comes about security we definitely need any solid idea and in this case laser security alarm is the best option to create at home in very easy way.
So in this tutorial we are going to learn how to make this project in very easy way which is also very low cost.

Gathering the Required Components

The required components are:-
1 BT169 and 2N2222N Transistors
1 LDR (light dependent resistor) which is the sensor of the circuit
1 LED for light detection
1 BUZZER for sound detection
1 6.8 k ohm resistor
1 100 or 220 ohm resistor
1 uf capacitor

1 pcb board for platform

1 9volt battery or 5 volt power supply from phone adapter
1 laser light (or you can use torch instead of laser light for testing like i have used)

Making Circuit

Now we have gathered our components and ready to make our circuit
we have to make the circuit by following the given circuit diagram

Testing Our Circuit

Now our circuit is ready and we have to test our circuit is properly working or not.
NOTE:- I AM USING MOBILE TORCH INSTEAD OF LASER LIGHT FOR TESTING

NOTE:- THE LIGHT SHOULD BE FOCUSED ON LDR (SENSOR)

Applying Dual Mode

Making Laser Security Alarm System - best and simple science project ever

As i mentioned in title of our project our circuit have dual mode
MODE 1:- by inserting BT169 transistor the light
glows nonstop by detecting object
between circuit and laser light
MODE 2:- by inserting 2N2222N transistor
instead of BT169 the light blinks
according to the object that detects
DON'T WORRY WE CAN UNDERSTAND IT PERFECTLY IN GIVEN VIDEO

PLEASE WATCH VIDEO IF YOU NEED MORE HELP

APPLICATIONS

This project is based on security issues so it is used in many types of security such as
home boundary
office boundary
garden boundary
setting it on unauthorized doors
jewellery security
etc.