Security is a prime concern in our day-today life. IR based security system is a low cost so that the concept is implemented by using an MCS 51 series micro controller.
The system is fully controlled by the 8 bit microcontroller p89S51 which has a 4Kbytes of ROM for the program memory. The system has a IR transmitter and IR receiver. These IR transmitter and receiver are connected at the Car/Bus/Van door. When any object is entering into the vehicle, Microcontroller P89s51 continuously monitor the infrared receivers ,when any object pass through the IR receiver?s then the IR rays falling on the receiver?s are obstructed, this obstruction is sensed by the microcontroller. Otherwise IR receiver receives the rays continuously from the transmitter, then automatically vehicle door is closed.? Mainly the system is used for automatica door closing purpose.
The implementation is made simpler by using IR sensor to detect the person. The system include the IR sensor, microcontroller, LED and a? 5V? power is supplied to run the system.The system uses a compact circuitry built around 8051 microcontroller Programs are developed in Embedded C. Flash magic is used for loading programs into Microcontroller.
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