Mini Project On Laser Light Security System

Description

The Laser Light Security System main purpose in making this project is that how do we make a security system device using a laser diode. We can use it anywhere like at the home, office, or in defence. In this, we have used some simple components like laser diode, 555 timers, LDR, resistance, and capacitors. In this kit, we also learn how PCB soldering and testing are done.

Mini Project Security System has used a laser diode and an LDR (Light-dependent resistor). When we keep the laser diode face towards the LDR, then all the light of the laser falls directly on the LDR. In this condition no buzzer will sound as soon as there is an interrupt meaning any object comes between the diode and the LDR, a buzzer will sound in that condition.

This On Laser Light Security System Project is very simple, the LDR which is installed in it gives an analog signal and this analog signal goes directly to the comparator IC LM358 Which converts the analog signal into a digital signal, the same digital signal goes to the 555 timer which provides timing how long will the buzzer last.