Call For Paper Volume: V, Issue: 06 | JUNE 2026 | International Journal of Advanced Trends in Engineering and Management (IJATEM)
Volume | Issue | | Paper ID: IJATEM 24_005 | DOI: https://doi.org/10.59544/ndph1807/svpcet24p5

Transmission of Audio and Text using Visible Light Communication

A.S. Sai Puneeth Theja, E. Sai Swetha, P. Janani, A. G. Gajarajan, E. Ganesh, G. S. Balaji

The application of Visible Light Communication (VLC) for transmitting text and audio data. The system utilizes readily available components for a low-cost and practical implementation. For the Text transmission, an Arduino microcontroller processes the text data and modulates the intensity of a mobile phone torch light (LED) based on the information. The modulated light signal is captured by a Light Dependent Resistor (LDR) sensor. Another Arduino detects the variations in light intensity and decodes the transmitted text, displaying it on an LCD module. Similarly for the Audio transmission, the audio signals from a mobile phone's audio jack are fed into an LED. The varying audio voltage modulates the light intensity of the LED. The light signal is converted back into electrical current by a solar panel. An audio amplifier boosts the weak current to a level suitable for driving a speaker, reproducing the transmitted audio. This work demonstrates the potential of VLC for simple data communication using light as a carrier. The chosen components offer a cost-effective and accessible platform for exploring the principles of VLC for text and audio transmission.