Gadget Download

                           RFID Library automation is a very innovative and interesting project that can play avital 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 are  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  tags  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  to128  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.

                             RFID is an acronym for Radio Frequency Identification. This project is a standalone Automatic two door interlock control system for toll tax using AT89S52 microcontroller. This project is useful in all applications where two door interlocking is needed. RFID is increasingly used with biometric technologies for security. Primarily, the two main components involved in a Radio Frequency Identification system are 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. 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.

       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 data in the card and displays on the LCD.

The aim of this project is to atomize the toll tax collection on highways. RFID reader, tags are used in this project to identify the entry or exit of the vehicle. The RFID reader is placed at the toll tax collecting area and each and every vehicle is provided with a RFID card. Each and every time when we place the RFID card on the reader the current value (in Rs) in the card has to be stored in the EEPROM. Once we pay the tax through RFID card the value of the card get decremented which can shown on 16X2 LCD.

Initially the gate is closed. Whenever any vehicle comes in front of the entry gate, the reader detects the RFID card owned by the vehicle owner and certain value of amount is detected automatically which will be displayed on 16X2 LCD. By using serial communication the data will be processed by the microcontroller and opens the entry gate by rotating the DC motor. After some delay, the gate will be closed.

The user places the RFID card in the RFID reader for collecting the tax, then. Then the exit gate opens for the vehicle to leave. The microcontroller closes the gate only after the vehicle exits out .If certain amount is not there in the card then he/she can renewal the RFID card. Once the amount is successfully deducted from RFID card only the gate opens. And again the RFID reader will be waiting for the next vehicle to enter.

                              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 applied in real time applications such as for recording the attendance. This system can be used in big companies, industries, colleges, schools, etc where there are many numbers of candidates available. This system helps us in recording the attendance of a person easily within fraction of seconds. RFID is increasingly used with biometric technologies for security. Primarily, the two main components involved in a Radio Frequency Identification system are 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 tags 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.

                      

     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 data in the card and displays on the LCD.

 If the data in the card is matched with the data in the program memory then it compares with that ID code and displays as “ID FOUND” along with his/her name on the LCD. After it displays it records the time at which the person has entered into the premises using real time clock (RTC) DS-1307. If the data is not matched then it simply displays as “ID NOT FOUND”.

In this project as we are using an RTC, to set the current time there are two switches provided one for entering and the other for incrementing. Then next one more switch is provided for checking the list of the candidates present. For the data not matched it alerts a person through a buzzer. The RFID module indicates a buzzer whenever it reads the data from the RFID card.

                                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. Hence this project can be very much useful and can be implemented in real time applications for recording the attendance and calculate late comers in the School and Collages.

         

                   

 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.