Home Security System Project Using Laser and LDR

laser light security systme

This is home security system project uses laser light and a light sensor LDR. A security system is used to protect our homes, offices, banks, lockers etc from unauthorized persons. Different types of security systems available and laser based security system is also an important and efficient type of Laser light security system.

A Laser security system can detect anything which cross the laser light and activate sound or noise, or it can call through cell phone which is attached with this system.

In this project, we have designed a very simple home security system project, which acts like a tripwire and triggers an alarm when the laser in interrupted. We have designed it with few components you can make it modern as you want.

Home security system project Circuit

laser security system


Components Required for home security system project

      • LDR
      • 230 Ω Resistors (1/4 Watt)
      • 10 KΩ Potentiometer
      • IRF 740 or any
      • Small Buzzer
      • Laser Pointer
      • 4V Battery
      • Connecting Wires

Circuit Design laser light security alarm

The design of the laser security system circuit is simple even it can be made by inexperienced person at home very easily. LDR and a 10 K Ω resistor are connected in a voltage divider fashion and its output  is connected to the buzzer When volts are equally dived the buzzer will remain silent and as laser light fail to drop on LDR the resistance of LDR decreases which trigger the buzzer.

Advantages Laser Security circuit

  • This is very simple, construction and setup for the Laser Security System is very simple.
  • We have used a battery as power supply, the laser security system can work even when there is a power outage.
  • It can be made at home with simple available components.
  • Laser light can b diverted through simple mirror to protect more area.

Disadvantages home security system

The laser security system alarm works only if the laser light is disturbed by crossing its light. If anyone cross the protected area without obstructing the laser, it is considered as a failure.

Applications home security system project

  • Laser Security System can be used for the safety of lockers in our homes,  even if the code of locker  is hacked, it acts as an additional layer of security system.
  • This laser security systems, can be used to protected place from the pets and children also.

Construction and Testing Output Video

Related Posts:

Be the first to comment

Leave a Reply

Your email address will not be published.