Nowadays, attend system in schools and colleges is generally based on paper. So sometimes this process causes errors and also takes more time. So this project uses RFID technology to make a note of every student entering into the classroom and also to calculate the time resides in the class. In this proposed system, every student is allotted with an RFID tag. The process of attendance can be done by placing the card near the RFID reader. This article discusses about what is RFID technology and attendance system using RFID with an example project.
What is RFID?
The term RFID (radio frequency identification) is a one type of electronic device includes a small antenna and a chip. This device is used to transmit the information like persons, animals, books or any stuff between reader and RFID tag using radio frequency electromagnetic fields. It is capable of carrying 2k bytes of data. There are different kinds of RFID systems in the market, which consist of an antenna, a transponder and a transceiver. Some types of tags can be located close to the RFID reader and some tags can be located far from the reader. The operating frequency ranges of these devices mainly include low, mid and high ranges. The low frequency range is from 30kHz to 500kHz, mid frequency range is from 900kHz to 1500kHz and high frequency range is 2.4kHz to 2.5kHz.
RFID Based Attendance System
The main concept of this attendance system using RFID is to maintain the attendance record. Every student is allotted with a particular authorized tag. This RFID tag can be used to swipe to record the attendance in front of the RFID reader.
Block Diagram of Attendance System
Nowadays, the attendance system in most of the schools and colleges is documented manually. But, this process takes lots of time. The proposed system uses a wireless technology (RFID).Every student is provided with an RFID tag, which includes an inbuilt IC for storing and processing the information. The block diagram of this project includes a microcontroller, an oscillator circuit, preset circuit, LCD display and an RFID reader.
The microcontroller used in this project is AT89C52 from the family of 8051. It includes 40-pins and 4-ports.
The circuit of the oscillator in connected in between the pins of 18 and 19 of the microcontroller. It is built with an oscillator with 11.0592 MHz and two 33pF capacitors.
The 9th pin of the AT89S52 is reset pin. The circuit of the preset is built with a 10μ capacitor, a 10k resistor and a switch. When the switch is pressed, the reset pin is connected to the Vcc and the microcontroller becomes reset.
The LCD display consists of 16 pins, where 3 pins are connected to the Vcc and remaining all are connected to the port-2 of the microcontroller.
The RFID reader is a one type of module and small in size. It incorporates with any type of hardware design. It is used to read the information which is stored in the RFID tags.
Working of Attendance System Circuit
After making all the connections of attendance system, give the power supply to switch on the circuit. The LCD will displays, please swipe the card. The information stored in the RFID tag is stated as the ID and attendance of the student. When the person places the card in front of the RFID reader, it reads the information and matches with the information stored in the AT89C52 microcontroller. The microcontroller is preprogrammed with embedded C language.
If the data in the card match with the RFID reader, then the information will be displayed on the LCD. This system will make the use of the status button for regaining the status of students’ attendance, which is interfaced to the AT89C52 microcontroller. By using this technology, a lot of time can be conserved as all the information of the student attendance will be directly stored in the database.
Applications of RFID
The applications of the RFID mainly involves in RFID based projects. RFID based attendance system project is used where authentication is required like educational institutions, industries, anywhere. In addition to the above discussed project, here we are giving some more applications of RFID system for the reader for understanding purposes.
- RFID Technology based Ambulance Flashing Light
- Electronic Passport System (EPS) using RFID Technology
- RFID ad Arduino based EPS (Electronic Passport System) for Easy Governance
- RFID Sensed Device Access using Arduino
- Indication of Parking Availability System
- RFID Technology based Car Parking Management
- Paid Car Parking with RFID technology
- Access Control System for Security using RFID Technology
- Device Control & Authentication using RFID and PIC Microcontroller
- Passport Details using RFID technology
The limitations of this attendance system using RFID is, it is very secure, but there is a chance of losing the card. By using this card any student can give other students’ attendance. If the student is swiped for number of times, there is a chance of giving attendance for next days.
This is all about what is RFID technology, RFID based attendance system using microcontroller project, block diagram and circuit diagram of attendance system, applications of RFID, and its limitations. We hope that you have got a better understanding of this concept. Furthermore, any help regarding this concept, or any other electronics projects, please give suggestions in the comment section given below.