The main aim of the project is to design a system which is capable of automatically deducting the amount for petrol dispensed from user card based on RFID technology. Liquid dispensing systems are quite commonly found in our daily life in different places like offices, Bus stands, Railway stations, Petrol pumps. Here we are going to present modern era petrol dispensing system which is meant to be operated with prepaid card using RFID technology. The project mainly aims in designing a prepaid card for petrol bunk system and also petrol dispensing system using RFID technology.   Automation is the most frequently spelled term in the field of electronics. The hunger for automation brought many revolutions in the existing technologies. One among the technologies which had greater developments is RF communications. The result of this is the RFID cards which transmit a unique identification number. This number transmitted by the RFID can be read with the help of a RF reader.   We make use of both these devices to construct a prepaid card for petrol station systems based on RFID. The concerned person of the vehicle should initially deposit money in the card using keypad. The RFID reader is interfaced to the on board computer is commonly termed as micro controller. The reader decodes the RFID tag which is with the vehicle and the amount is reduced from the prepaid card and this information is fed as input to microcontroller. The controller reads this input and controller starts operating the dispensing motors until the required amount of petrol is dispensed into the vehicle. The dispensing system forms the output module and is interfaced to the same onboard computer. The input from RFID is also displayed on the Graphical LCD for the acknowledgement of the user.        

Features:  

1. Real time authentication system
2. Low power consumption.
3. Long life.
4. Accuracy in the amount of petrol dispensed.
5. Highly sensitive.

  This project provides exposure to the following technologies:  

1. Interfacing Dispensing system and microcontroller.
2. Interfacing RF reader and microcontroller.
3. Embedded C programming for microcontroller.
4. Design of PCB.
5. GLCD interfacing and programming.

  The major building blocks of this project are:  

1. Regulated power supply.
2. RFID reader.
3. RFID tag.
4. Microcontroller
5. Graphical LCD.
6. Keypad
7. Crystal
8. Dispensing system.
9. LED Indicators.
10. Buzzer

      Software’s used:  

• PIC-C compiler for Embedded C programming.
• PIC kit 2 programmer for dumping code into Micro controller.
• Express SCH for Circuit design.

   

Block Diagram:

video: