ABSTRACT:
Radio Frequency Identification (RFID) Card Readers provide a low-cost solution to read passive RFID transponder tags up to 2 inches away. The RFID Card Readers can be used in a wide variety of hobbyist and commercial applications, including access control, automatic identification, robotics navigation, inventory tracking, payment systems, and car immobilization. The RFID card reader read the RFID tag in range and outputs unique identification code of the tag at baud rate of 9600. The data from RFID reader can be interfaced to be read by microcontroller or PC.
Microcontroller connected to RFID reader through serial port. Whenever RFID card swipe, Reader gets card information and sends to microcontroller serially. Each card assign to each student/employee in schools or offices. Microcontroller other end connected to PC through serially. Whenever swipe the card microcontroller take data from reader and send to PC. PC has application (C# .net) and it maintain all student data base information along with corresponding card details. Application decide the absents and presents of all students. This project avoids lot of manual process. It is more helpful in where robust strength occur. This project makes automation in attendance system in any place. We can see attendance records from data base with respective to dates.
Microcontroller has only one serial port but project needs two serial ports. Serial shifter makes two serial ports.
In this project 7805 is a regulator and it avoids noise spikes in power supply. RFID modem is connected microcontroller through serial port. These RFID modem works under 9600 or 4800 baud rates.
TECHNICAL SPECIFICATIONS:
HARDWARE:
Micro controller : AT89S52
Crystal : 11.0592 MHz
LED : 5mm Red LED
Serial Driver : Max 232
Serial Shifter
RFID modem
Power supply
Transformer : 12V step down
Filter : 1000uf/25V
Voltage Regulator : 7805
SOFTWARE:
Keil micro vision
Proteus
UC flash
C# .net Application
APPLICATIONS:
- Schools
- Colleges
- Industries
- Corporate offices