The technology is developed day by day in the world. The crime gang also improves its technology to carry out its operation. So security technology must be modern over time to protect crime works. We decided to do a security project like our project. In this project we have used laser light to cover a large area. We know that laser light passes through long distance without scattering effect. It is also visible only at the point of origin and incidence, otherwise invisible. These two properties help us build a modern security system, which can be referred to as "laser security". When any character object crosses the laser line, the security alarm will turn on and the focus light will turn on to focus on the entry of an unauthorized person.
Wireless security systems can be easily controlled through a wireless remote control or a touch-sensitive phone from anywhere. Here the main components of the laser security system are infrared motion sensors and a basic alarm unit. It works based on the detection of heat of a person's body in case of any safety malfunction. Based on this alarm unit is activated. The system alerts the person monitoring the safety and local law enforcement body if necessary. At the same time a sharp sound also sirens. There are two types of laser beams available, green modules and infrared. System through an infrared module will not be visible. Another beam like the green would be visible to the naked eye and serve as a deterrent.
Laser safety system blocks work together with circuit diagram
The laser door alarm is based on the interruption of the laser beam. The laser pointer is used as the source of the light beam. If someone tries to break the path of the laser, then an alarm will be generated in a few seconds. Normally, the alarm circuit of the laser door will have two sections. First, the laser transmitter is a laser pointer readily available. This is powered with 3 volts of DC power and is fixed to one side of the door frame. The receiver will have a phototransistor at the front end. We used the L14F1 NPN Darlington photo transistor as a laser sensor. Here IC1 is used as a voltage comparator with its inverting input connected to a potential divider R2-R3. We use the inverter input to keep the supply voltage in the middle.