RFID based Attendance System

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RFID Based Attendance System
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RFID Based Attendance System

• Introduction
• The main functionality of this project is to
  verify the identity / attendance of the user who
  needs to access it through RFID.
• For this purpose the authorized person is given
  an RFID card.
• This card contains an integrated circuit that is
  used for storing, processing information through
  modulating and demodulating of the radio
  frequency signal that is being transmitted.
• Thus, the data stored in this card is referred as
  the identification/attendance of the person.

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RFID Based Attendance System

• Once, the person places the card in front of the
  RFID card reader, it reads the data and verifies
  it with that data present in the system and if it
  matches then it displays a message as valid entry
  and allows accessing the device or else displays
  invalid and denies the access/attendance.

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RFID Based Attendance System

• RFID Based Attendance System Principle
• RFID based attendance system consists of RFID
  Reader, RFID Tag, LCD display and microcontroller
  unit.
• RFID can be interfaced to microcontroller through
  USART. Data is transferred from RFID cards to
  reader and from there to microcontroller.
• RFID tags are of two types
• Passive Tags.
• 2) Active Tags.

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RFID Based Attendance System

• Passive tags contain 13 digit number tag inbuilt
  in it, where as active tag is read/write tag i.e.
  one can read from the tag and write to the tag.
• RFID projects uses passive tag. In real time, one
  can issue active tags to the students, with their
  roll numbers as their tags.
• RFID reader contains a copper winding in it. This
  winding acts as an antenna.
• When the tag is placed near the reader, due to
  the induced mutual inductance energy, data is
  transferred to reader. Reader then transfers data
  to the microntroller.
• Microcontroller checks for the data continuously,
  if any data is received, microcontroller compares
  the data in data base. If the tag is
  authenticated, microcontroller takes the
  attendance.

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RFID Based Attendance System
Block Diagram

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RFID Based Attendance System

• Hardware Requirements
• 8051 series Microcontroller
• RFID tags and RFID Reader
• LCD
• Resistors
• Capacitors
• Diodes
• Transformer
• Voltage Regulator
• Crystal
• switches

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RFID Based Attendance System

• Software Requirements
• Keil compiler
• Language Embedded C or Assembly

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RFID Based Attendance System
Circuit Diagram

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RFID Based Attendance System

• How to Operate RFID Based Attendance System
  Circuit
• After making all the above connections, Switch on
  the circuit.
• On LCD it is displayed PLEASE SWIPE THE CARD.
• Place the RFID based attendance tag near the
  reader.
• Reader then reads the data in the tag and
  transmits to the controller.
• Microcontroller compares the tag with the
  database. If the tag is matched LCD displays
  authenticated and takes your attendance.
• Now place another card which is not present in
  the database and check for authentication.

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RFID Based Attendance System

• Now LCD displays Un authorized and it will
  never take the attendance.
• In this way, we can use implement this circuit.

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RFID Based Attendance System

• Liquid crystal display-lcd
• Most common LCDs connected to the
  microcontrollers are 16x2 and 20x2 displays.
• This means 16 characters per line by 2 lines and
  20 characters per line by 2 lines, respectively.
• The standard is referred to as HD44780U, which
  refers to the controller chip which receives data
  from an external source (and communicates
  directly with the LCD).

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RFID Based Attendance System

• Applications
• RFID based attendance system can be used in
  educational institutions, industries, anywhere.
• RFID is emerging technology and is used in
  applications where authentication is needed.

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RFID Based Attendance System

• Advantages
• Proxy attendance can be caught.
• Hard copy paper work of attendance sheets is
  reduced.
• Data can be store long time compare to attendance
  sheets.
• This system is fully automated and it does not
  require any human interaction except setting the
  initial time setting.
• LCD and PC interface both are provided with RFID
  based attendance system. This gives benefit of
  viewing attendance on the spot on LCD or remotely
  from computer.

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RFID Based Attendance System

• Limitations
• RFID attendance system is secured, but there is a
  chance of misusing the cards. One person can give
  another persons attendance if he/she had RFID
  card.
• If the card was swiped for more than once, there
  is a chance of giving attendance for next days
  also if code is not written properly.

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RFID Based Attendance System

• Future Scope
• Range of the RFID reader can be increased, so the
  reader can detect the tag from far distance.
• RF TRANSRECEIVER module can be used for long
  distance communication to transfer data.
• The transferred data can be save and store in
  computer as a database using specific software.
• Timely attendance can be monitored i.e. time in
  and time out can bar corded using RTC (real time
  clock) and can be stored in the database

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RFID Based Attendance System

• This attendance systems data base can be linked
  with college website and can be shared and
  monitored by the students parents.
• We can send this data through internet to the
  user. So that user can access it remotely via
  internet.
• We can implement GSM technology

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Railway Track Security by GSM With User
Programmable Number Features

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