ABSTRACT:

Radio Frequency Identification (RFID) Card Readers provide a low-cost solution to read passive RFID transponder tags up to 2 inches away. The RFID Card Readers can be used in a wide variety of hobbyist and commercial applications, including access control, automatic identification, robotics navigation, inventory tracking, payment systems, and car immobilization. The RFID card reader read the RFID tag in range and outputs unique identification code of the tag at baud rate of 9600. The data from RFID reader can be interfaced to be read by microcontroller or PC.

     This project can be used for security purpose where it gives information about the authorized persons and unauthorized persons. This project is mainly used in banks where the persons will be given an ID CODE to access his/her locker system or his/her account. This can be applied in real time systems to know about the persons who can access the banks. For the persons without an ID CODE cannot access the system.       In this project, the RFID module reader typically contains a module (transmitter and receiver), a control unit and a coupling element (antenna). This module is interfaced with the micro controller and when the card is brought near to the RFID module it reads the ID CODE in the card and then compares with the ID CODE present in the system and if it matches then the door gets opened in clockwise direction and the person gets in and after sometime the door gets automatically closed. Every time we make a transaction we need to enter user id and password using KEYPAD. For a successful match of the Id transaction is enable else denied. If the password is not matching after three successive failures the system gets locked itself and further transaction are denied. The transaction denial is indicated by hooting a buzzer.

In this project 7805 is a regulator and it avoids noise spikes in power supply. RFID modem is connected microcontroller through serial port. These RFID modem works under 9600 or 4800 baud rates. 16X2 LCD connected to microcontroller through digital I/O lines.

TECHNICAL SPECIFICATIONS:

HARDWARE:

Micro controller         :           AT89S52

Crystal                        :           11.0592 MHz

LED                            :           5mm Red LED

Serial Driver               :           Max 232

LCD                            :           HD44780 

RFID modem, Buzzer   

DC motor, L293D driver

4X4 keypad

Power supply

Transformer                :           12V step down  

Filter                           :           1000uf/25V

Voltage Regulator      :           7805

SOFTWARE:

Keil micro vision

Proteus

UC flash

APPLICATIONS:

• Security systems
• Banks
• Commercial purpose