On LCD it is displayed “PLEASE SWIPE THE CARD”.After making all the above connections, Switch on the circuit.How to Operate RFID Based Attendance System Circuit? DOWNLOAD PROJECT CODE RFID based Attendance System Circuit Simulation Video Send the data on data pins and make enable pin low. Then make Rw pin low, RS pin high, enable pin high. To display data on LCD, initially set the LCD in 4bit mode. RS pin is connected to PB4, RW pin is connected to PB5 and enable pin is connected to PB6 of microcontroller.

D4 – D7 data pins are connected to the PB0 – PB3 pins of microcontroller. Interfacing of LCD in 4 bit mode is in to microcontroller which is shown in the circuit diagram.

LCD display is connected to Port B of the microcontroller. One should declare these registers in order to transmit or receive data serially. Serial data can be transmitted from RFID module to microcontroller using UART. ATmega8 microcontroller has USART registers internally. USART is acronym for Universal Synchronous and Asynchronous Receive and Transmit. RFID module communicates with the controller using USART, where USART is a communication protocol. Related Post: Biometric Attendance System using AVR Microcontroller. PD0 pin is receiver and PD1 pin is transmitter. If pins are not available to the module, connect it using DB9 connector. PD0 and PD1 pins of microcontroller.VCC is connected to 5v and GND is connected to ground. These pins are connected to the transmit and receive pins of the micro controller i.e. The RFID Reader has transmit and receive pins. RFID based attendance system has very simple circuit design. Circuit 1 RFID Based Attendance System Circuit Diagram using AVR Circuit Diagram of RFID Based Attendance System – Electronics Hub Circuit ComponentsĬircuit Design of RFID Based Attendance System Also you can check out the rfid based attendance system output video. If the tag is authenticated, microcontroller takes the attendance. Microcontroller checks for the data continuously, if any data is received, microcontroller compares the data in data base. Reader then transfers data to the microntroller. When the tag is placed near the reader, due to the induced mutual inductance energy, data is transferred to reader.

RFID reader contains a copper winding in it. In real time, one can issue active tags to the students, with their roll numbers as their tags. one can read from the tag and write to the tag. Passive tags contain 13 digit number tag inbuilt in it, where as active tag is read/write tag i.e. RFID tags are of two types – 1) Passive Tags and 2) Active Tags. Radio frequency technology is used in many applications. Data is transferred from RFID cards to reader and from there to microcontroller. RFID can be interfaced to microcontroller through USART. RFID based attendance system consists of RFID Reader, RFID Tag, LCD display and microcontroller unit. DIY Project Kit : RFID based Attendance System » RFID Based Attendance System Circuit Principle

Rfid reader library for proteus