akshaya COLLEGE OF ENGINEERING AND TECHNOLOGY
Kinathukadavu - Coimbatore -642109
SECURITY BREACH ALARM
USING PIC 16F877A
ABSTRACT If a person entering to the monitored area, after sensing the person LDR checks the light intensity of the monitored area, whether it is bright or dark. Depending on the LDR output, the buzzer will beep to indicate the crossing of a person.
By interfacing buzzer and LDR with PIC16F877A when a person crosses the continuously emitted light ray on LDR, alarm will hear for person inside the home.
The project is mainly based on the security problems, the is one of the efficient method to overcome the security based problems.
· PIC controller kit PIC16F877A · Computer · Rs232 cable
· Power cords
· Connecting wires
· MPLAB IDE 8.50 · ISIS proteus
DESCRIPTION OF COMPONENTS:
LDR: LDR’s or Light Dependent Resistors are very useful especially in light/dark sensor circuits. These help in automatically switching ON /OFF the street lights and etc., normally the resistance of an LDR is very high, sometimes as very high as 1000000 ohms, but when they are illuminated with light,