RFID Based Attendance System
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 ďƒ˜ 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 1) Passive Tags. 2) Active Tags. http://www.edgefxkits.com/
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. http://www.edgefxkits.com/
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. http://www.edgefxkits.com/
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 ďƒ˜ RFID based attendance system can be used in educational institutions, industries, anywhere. ďƒ˜ 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. http://www.edgefxkits.com/
RFID Based Attendance System Limitations RFID attendance system is secured, but there is a chance of misusing the cards. One person can give another person’s 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 http://www.edgefxkits.com/
RFID Based Attendance System This attendance system’s data base can be linked with college website and can be shared and monitored by the student’s 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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