Monday, October 2, 2017

Microcontroller Project: RFID Based Attendance System Based on ATMega 8

Robometricschool. - This is one of the application of microcontroller ATMega 8 from ATMEL for building RFID based attendance system for you. It is seem be nice when you can build this RFID project system yourself. 

In here beside we will give you the description, circuit schematic, and other component needed, we also will give you to you to read more about the complete project from other source.

Circuit Schematic

Component Parts

  • ATMEGA8 Microcontroller.
  • RFID Reader
  • RFID Tags.
  • LCD display

Description

Accordingly Electronicshub site that published this circuit describe that RFID based attendance system has very simple circuit design. The RFID Reader has transmit and receive pins. These pins are connected to the transmit and receive pins of the micro controller i.e. PD0 and PD1 pins of microcontroller.VCC is connected to 5v and GND is connected to ground.

If pins are not available to the module, connect it using DB9 connector. PD0 pin is receiver and PD1 pin is transmitter.

RFID module communicates with the controller using USART, where USART is a communication protocol. USART is acronym for Universal Synchronous and Asynchronous Receive and Transmit.

Serial data can be transmitted from RFID module to microcontroller using UART. ATmega8 microcontroller has USART registers internally. One should declare these registers in order to transmit or receive data serially.

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




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