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

A Laser security system can detect anything which crosses the laser light and activate sound or noise, or it can call through a cell phone which is attached to 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 is interrupted. We have designed it with a few components so you can make it as modern as you want.

Home Security System Project Uses Laser Light and a Light Sensor LDR

Laser Security System

Components Required for Laser Security System

  • 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 if it can be made by an 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 have equally dived the buzzer will remain silent and as laser light fails to drop on LDR the resistance of LDR decreases which triggers the buzzer.

Advantages Laser Security circuit

  • This is very simple, construction and setup for the Laser Security System are very simple.
  • We have used a battery as a power supply, and 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 mirrors to protect more areas.

Disadvantages of home security system

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

Applications home security system project

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

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