INTRUDER DETECTION AND FIRE ALART SYSTEM

 INTRODUCTION 

• Forest play a vital role in survival of humans.
•  Forest  protection is important .
•  We use Pic microcontroller, sensors and buzzer.
• Intruder detection. 
• We have used a laser source for the intruder detection.   

BLOCK DIAGRAM 

METHODOLOGY 

  Power supply is connected to the                  system controller toinitialize and the              controller starts monitoring  the                      inputs  of   sensors

•     Controller is connected to LDR (Light dependent resistor)sensor, Temperature sensor & Alarm system
•     Inputs of the sensors are monitored continuously
•     If any sensor goes pre defined set threshold values of thesensor, Then the controller turns On the alarm for alerting
•     ADC  values are calculated using the formula
•     In the program code we have given to micro controller , we have set the temperature limit of 50 degree for  the temperature sensor(LM335)and the for the LDR sensor , we have set the time limit of 2 sec.
•    ADC=  (Analog volt *2^10)/Volt difference.
•    If any of the  set limit is crossed, micro controller  sends the message through the buzzer 
• If the limit crossed is from fire sensor or temperature sensor , Buzzer beeps continuously . and if it is from LDR sensor , Buzzer  makes intermittent sound