This project aims in designing a user friendly, automatic shopping trolley using RFID technology and LCD (Liquid Crystal Display). The RFID reader scans RFID tags on products, adding them to the list. The buzzer provides audio feedback to confirm the addition of each item. This system consists of Bluetooth module for sending the number of products and bill to the user Bluetooth mobile application and also paying the amount from Bluetooth mobile application. 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 RFID reader. The RFID reader is interfaced with the microcontroller and RFID tag is attached to each and every good package. When the goods are moving on the trolley with the RFID tags attached to every product are decoded by the RFID reader interfaced to the microcontroller and display the bill and number of products in trolley on LCD along with buzzer. The system processes the payment by resending the ‘P’ from user Bluetooth mobile application.   This project makes use of an onboard computer, which is commonly termed as micro controller. It acts as heart of the project. This Arduino can efficiently communicate with the output and input modules which are being used. The controller is provided with some internal memory to hold the code. This memory is used to dump some set of assembly instructions into the controller. And the functioning of the controller is dependent on these assembly instructions. The Microcontroller is programmed using Embedded C language which provides effective environment for performing the task of the project.

     

The major building blocks of the project are:  

• Adapter power supply.
• Arduino UNO Micro controller.
• RC522RFID reader and tags.
• LCD display.
• Buzzer.
• HC-05 Bluetooth module.

  Software’s used:  

1. Embedded C programming.
2. Arduino IDE studio compiler.
3. Express SCH for Circuit design.

    Block diagram:      

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