RFID Based Library Automation System
Title of the project: RFID based Library Automation System
Domain: Advanced Embedded Systems Design
Software: Embedded C, Keil, Proload
Microcontroller: AT89S52
Power Supply: +5V, 750mA Regulated Power Supply
Display: LED 5mm, 16 X 2 LCD
Crystal: 11.0592MHz
Data Communication: Through Serial Communication
Applications: Colleges, Companies, Banks, Industries

ABSTRACT

RFID Library automation is a very innovative and interesting project that can play a vital role in library automation. In this project, each student and each book are assigned with an RFID card. If a student wants to daw a book from the library, he has to swipe his Id card and then Book Id card. The system records the book transaction into the specified student account. Whenever he wants to return the book, he has to follow the same procedure. If the student reaches the maximum number of drawls of the books, the system alerts with a message on the LCD.
RFID is an acronym for Radio Frequency Identification. RFID is one member in the family of Automatic Identification and Data Capture (AIDC) technologies and is a fast and reliable means of identifying just about any material object. This project can be used for security purpose where it gives information about the authorized persons and unauthorized persons. This can be applied in real time systems as such in recording the attendance, in the companies, airports for accessing the passports and in industries to know who are authorized. RFID is increasingly used with biometric technologies for security. Primarily, the two main components involved in a Radio Frequency
Identification system is the Transponder (tags that are attached to the object) and the Interrogator (RFID reader). Communication between the RFID reader and tags occurs wirelessly and generally doesn’t require a line of sight between the devices.
RFID tags are categorized as either active or passive. Active RFID tags are powered by an internal battery and are typically read/write, i.e., tag data can be rewritten and/or modified. An active tag's memory size varies according to application requirements; some systems operate with up to 1MB of memory. Passive RFID tags operate without a separate external power source and obtain operating power generated from the reader. This project uses passive tags. Read-only tags are typically passive and are programmed with a unique set of data (usually 32 to 128 bits) that cannot be modified. The reader has three main functions: energizing, demodulating and decoding.
The antenna emits radio signals to activate the tag and to read and write data to it.
The significant advantage of all types of RFID systems is the non contact, non-line-of-sight nature of the technology. Tags can be read through a variety of substances such as snow, fog, ice, paint, crusted grime, and other visually and environmentally challenging conditions, where barcodes or other optically read technologies would be useless. This project can provide security for the industries, companies, etc.
This project uses regulated 5v, 500mA power supply. 7805, a three terminal voltage regulator is used for voltage regulation. Bridge type full wave rectifier is used to rectify the ac output of secondary of 230/12v step down transformer. The RFID module requires a separate +5v power supply.



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