Laser Security Alarm System Circuit Diagram

Easy laser light security system circuit at home.

Laser security alarm system circuit diagram.

Your laser security alarm system is now ready. In this laser security alarm circuit we have used lm358 dual comparator ic for comparing voltages coming from ldr. If somebody tries to break the laser path then an alarm will be generated in a few seconds. One of them can put in front of the locker while another one can be placed on the front door.

Normally laser door alarm circuit will have two sections. Circuit diagram and explanation. This video just to show how to make laser light security at home by using two transistor three resistance one photo resistance ldr and one led. If the intruder passes without obstructing the laser it is considered as a failure.

Laser light circuit fig. The circuit construction and setup for the laser security system is very simple. Layout or path draw of the pcb fig 2. Hi i made a laser security system with resistors 1k and 6 8k and fet.

Laser security system locks working along with circuit diagram. The laser security system works only if the laser is obstructed. Working of security alarm circuit. As soon as you connect the battery the l e d and buzzer will come on if you re in a dark room.

The laser pointer is used as the source of light beam. S1 and s2 are the two switches that are used in the circuit so that both can be put in two different places i e. Focus the laser diode light on the ldr and you will see the l e d and buzzer going off if you interrupt the laser light focusing on the ldr the circuit will trigger and the alarm will ring. Laser door alarm is based on the interruption of laser beam.

Comparator is configured as non inverting mode and one 10k potentiometer is connected at its non inverting terminal. If used with a battery the laser security system can work even when there is a power outage. Pull pin security alarm circuit.