AMC ENGINEERING COLLEGE,BENGALURU-83
(APPROVED BY AICTE, PERMANENTLY AFFILIATED TO VTU,
BELAGAVI, ACCREDITED BY NAAC & NBA)
DEPARTMENT OF ELECTRONICS & COMMUNICATION ENGINEERING
Minor Project On
“Li-Fi Data Transmission System”
Guided By, MAYANK ANAND (1AM22EC062)
Dr. MRUNALINI SUHAS MOHAN KUMAR(1AM22EC066)
Associate Professor NANDAN SAGAR S(1AM22EC070)
CONTENTS
• Introduction
• Objectives
INTRODUCTION
Li-Fi, or Light Fidelity, is a cutting-edge wireless communication technology that
uses visible light, rather than radio waves, to transmit data. Li-Fi uses the light
emitted by LED bulbs to carry information at high speeds. This technology offers
several advantages, including faster data transmission rates, higher security (since
light does not penetrate walls), and reduced electromagnetic interference. The core
principle behind Li-Fi is modulation, where the light intensity is rapidly varied to
encode data, which is then decoded by a receiving device equipped with a
photodiode or light sensor.
This project focuses on building a simple prototype of a Li-Fi system,
demonstrating how basic data can be transmitted using light and highlighting the
potential of Li-Fi for future high-speed, secure, and energy-efficient
communication systems.
OBJECTIVES OF PROJECT
• Data Generation: Input data is generated, which can be a simple string like “HELLO” or binary
data.
• Modulation: The transmitter microcontroller converts the input data into binary form, Based on
the binary data, the LED is modulated to blink in specific patterns that represent binary 1s and 0s.
• Light Transmission: The modulated light is emitted from the LED, As the light pulses are fast,
the changes in light intensity are imperceptible to the human eye but can be detected by the
receiver.
• Light Reception: The photodiode or LDR at the receiver detects changes in light intensity, The
photodiode converts the light pulses into electrical signals that correspond to the original binary
data.
• Demodulation: The receiver microcontroller decodes the binary data from the electrical signals,
The data is then reconstructed into its original form (e.g., text) and displayed on a serial monitor.
BLOCK DIAGRAM
