A laser-based security system is a type of security alarm that uses a light sensor and laser light. In this tutorial, we are going to demonstrate a circuit of a laser security alarm system that will detect any irregular activity and will produce sound using a buzzer. One of the main components of this circuit is LDR. It will detect dark and light laser beams and will change its resistance to send a signal to the buzzer. Laser based Security System is a type of security and alarm system that uses laser light and a light sensor. A security system protects our homes, offices, banks, lockers etc. from intrusion and unauthorised access. There are different types of security systems available and laser based security system is an important and efficient type. A Laser security system can acts as a standalone system, which makes some sound or noise when it detects any irregular activity, or can be part of a much bigger security and home automation system, which can send messages, call the owner etc. In this project, we have designed a simple DIY lased based security system, which acts as a tripwire like security system and triggers an alarm when the laser in interrupted.
