The main aim of the project is to design a system which is capable of automatically deducing the dispensed amount of petrol from user prepaid card (i.e., RFID card) and that deduced amount information and remaining balance of the card will display on LCD.   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. Provides the consumers to know, how much amount of petrol has been filled. It also provides accuracy, saves consumers valuable time and avoids misconceptions and arguments with works at the petrol bunk.   The project makes use of an Arduino Nano microcontroller, which acts as a central controlling unit. This module is capable of communicating with the input and the output modules. The user initially has to deposit money, save time in the cards number. The input module is the RFID reader which decodes the RFID tag and it will give to the controller. By using 4*4 keypad user enter the amount for fuel based on amount the system dispensing the petrol. After completion of petrol filling process, the information of the remaining balance of the RFID card will be display on LCD. And when wrong tag was detected then buzzer will on. Based on the amount, microcontroller will switch ON/OFF the motor through relay. Here relay works as a switch to on/off the motor. Here we are using water instead of petrol. So, the motor pump the petrol at particular time which is saving in that card and automatically reduce the money from that card. The status of the project will display on LCD. The Microcontroller is programmed using Embedded C language.  

Features:

• Petrol dispensing using RFID technology.
• Visual alerts using LCD.
• Real time authentication system.
• Enter the required amount of fuel and password using keypad.
• Accuracy in the amount of petrol dispensed.
• AC motor as a dispensing system.
• Using Arduino NANO Microcontroller to achieve this task.

    The major building blocks of this project are:  

• Regulated power supply.
• RFID reader.
• RFID tag.
• Arduino nano Microcontroller.
• LCD display.
• 4*4 Keypad.
• AC motor with relay (Dispensing system).
• Buzzer

    Software’s used:  

• Embedded C programming.
• Arduino IDE programmer for dumping code into Micro controller.
• Express SCH for Circuit design.
           
Regulated Power Supply:            
  Block Diagram:         video: