This kit laser based security system is designed to provide maximum security to a given restricted area where the presence of any person is not desired. If someone tries to pass over the boundary line defined by laser lights, an alarm will be triggered and a sms to the authorized person will be sent. Proper messages will also be displayed on the LCD.
In the kit laser based security system Light Dependent Resistors (LDR) is used as a laser light sensor. If the laser lights are cut, even for a moment, the intensity of the light on the LDR will decrease. On this momentary duration the output of the ADC converter will go low and the microcontroller can sense this information quickly. Now the microcontroller will trigger an alarm and will send a sms using GSM. The GSM modem is connected with the controller serially which works on series of AT commands given by the microcontroller.