Laser Light Security Alarm System Circuit Diagram

Normally laser door alarm circuit will have two sections.

Laser light security alarm system circuit diagram.

There are different types of security systems available and laser based security system is an important and efficient type. Laser security system locks working along with circuit diagram. Laser based security system is a type of security and alarm system that uses laser light and a light sensor. 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.

In this circuit we have set reference voltages of comparators by using potentiometer we can say this sensitivity of the circuit. Your laser security alarm system is now ready. Laser door alarm is based on the interruption of laser beam. Steps to make laser light security alarm.

You can use any cheap toy laser available in the. The circuit is using only few low cost components. 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. Easy laser light security system circuit at home.

Then connect the ldr from the base and emitter of the bc547 transistor. Laser light circuit fig. Comparator is configured in non inverting mode. As soon as you connect the battery the l e d and buzzer will come on if you re in a dark room.

Layout or path draw of the pcb fig 2. This system for security uses the combination of laser light and ldr. The laser pointer is used as the source of light beam. A security system protects our homes offices banks lockers etc.

In this system we have placed laser light and ldr facing each other so laser light continuously falls on ldr. If somebody tries to break the laser path then an alarm will be generated in a few seconds. Circuit diagram of laser light security alarm. The ldr module has an onboard potentiometer to adjust the sensitivity of ldr so that it only senses laser light falling onto it the concept is quite simple and similar to what we see in movies where antique priceless ornaments are protected under laser lights as someone crosses these lights an alarm runs on to indicate.

Place the bc547 transistor on the breadboard as shown in the fig below. Working of laser security alarm circuit. The circuit can be used as a laser door alarm laser motion detector laser proximity sensor trip wire alarm and for other simple home security purposes.