A Cost-Effective Approach to Transmit Data Through Visible Light

This paper presents a study on how optical wireless communication (OWC) can be used as a new form of data transmission in small distances and a solution for the current radio-frequency spectrum shortage. OWC has a major drawback of not having the proper light source that can be used for modulation. Persisting light sources do not have the flexibility for the implementation of complex modulation processes. These are now replaced by a more efficient and mobile source like the light-emitting diode (LED). LEDs can be used for data transmission in small distances which can be increased using the proper lens. In this study, LED is used to build a low-cost communication system via visible light with a simple modulation technique using Raspberry Pi which is known as a visible light communication (VLC) system. And we believe that it is one of the first instances of the VLC system using Raspberry Pi. This approach tends to find the simplest way to transmit data using a light source. The data transfer rate can be increased by using other modulation techniques and adding more levels to it. Hence, an initiative is taken to develop a better data transfer process with higher transmission speed (using Raspberry Pi). The transmission distance can be increased using more coherent light sources and an efficient receiver.