  We all know that Wi-Fi is presently the most commonly used technology for
data transmission and connecting devices to the Internet, at the same time due
to much reasonable concern, (such as Wi-Fi can be vulnerable when it comes to
hacking, health concern, and low latency, etc.) the concept of Li-Fi is
becoming very popular as a new way of data transmission that use light waves to
transmit data rather than radio waves. Light-emitting diodes LED are used when
transmitting the data in the visible light spectrum. Li-fi uses visible light
communication and it has a promising future. Unlike Wi-fi, Li-Fi has low
latency, high efficiency, accessible spectrum, and high data can be achieved.
It is highly secured so the data cannot be hacked. In this paper, we design a
concept of Li-fi audio signal transmission by reusing and repurposing
pre-programmed modules to simplify and discuss visible light communication
(VLC) in other to give a new researcher the idea on how the concept of LiFi and
VLC. In addition to designing the concept we experiment to test the concept and
we illustrated the result within this paper.

Signal Processing