Li-Fi Data Transfer System using ATmega 32

Light Fidelity (Li-Fi) is an emerging wireless communication technology that utilizes the visible light spectrum to enable high-speed data transfer. This research proposes a microcontroller-based Li-Fi system using the ATmega32 to demonstrate low-cost, efficient, and short-range data communication. The transmitter modulates binary data through lightemitting diodes (LEDs), while the receiver employs a photodiode for data detection and demodulation. Experimental results show successful transmission of digital information over a limited distance under controlled conditions, with observations on system limitations and performance factors. This work contributes toward the development of cost-effective, visible light-based wireless networks, suitable for specific low-range applications.