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.
Each bus contains a RFID tag which contains the bus number. And each bus stop contains a RFID reader which reads this TAG. RFID reader placed at in front of bus stop or at gate. Whenever bus comes inside the bus stop RFID reader reads the card (located inside the bus) information and displayed on 16X2 LCD display. This 16X2 LCD display located in bus stop and journey people easily identify which bus coming into the bus stop.
If any unauthorized cards are coming then it gives long beep sound through buzzer.
Every bus stop has same RFID reader along with microcontroller and they read cards information and displayed on LCD. But in this project due to cost criteria we implement one system for one bus stop. 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. 16X2 LCD connected to microcontroller through digital I/O lines.
TECHNICAL SPECIFICATIONS:
HARDWARE:
Micro controller : AT89S52
Crystal : 11.0592 MHz
LED : 5mm Red LED
Serial Driver : Max 232
LCD : HD44780
RFID modem, Buzzer
Power supply
Transformer : 12V step down
Filter : 1000uf/25V
Voltage Regulator : 7805
SOFTWARE:
Keil micro vision
Proteus
UC flash
APPLICATIONS:
- APS RTC
- Bus stops
- Railways