Transmission of Digital Audio with Visible Light

Communication by visual light or VLC by its acronym in English (Visual Light Communication), uses visible light from fluorescent lamps, or light from light emitting diode (LED) to transmit information. The transmission of information is done by modulating the intensity of the LED light. In the receiver the information is initially recovered through a photo-detector, which is usually connected to a device for the final recovering of the information. In this article we describe an application based on VLC, to transmit audio stored in a micro SD card using a shield mounted on an Arduino microcontroller, and several modules (called bits) of LittleBits. The use of modular components that allow simple interconnection, facilitated the development of this application.