Objective: The main objective of this project is to design a system that can control an electrical appliance (such as a light bulb or a fan) using an RFID card. The system consists of an Arduino microcontroller, an RFID reader, a relay module, and the electrical appliance to be controlled.

Working Method: When an authorized RFID card is presented to the RFID reader, the microcontroller reads the card's unique ID and sends a signal to the relay module to turn on the electrical appliance. Similarly, when the same RFID card is presented again, the microcontroller sends a signal to the relay module to turn off the appliance.

The system can also be programmed to work with multiple RFID cards, each with a unique ID, to control different electrical appliances. The Arduino code is programmed to check the RFID card's ID against a list of authorized IDs, and only the authorized RFID cards can turn on/off the electrical appliance.

This project provides a convenient and secure way to control electrical appliances using RFID technology, which is widely used in various applications such as access control, security systems, and inventory management.