Data Transfer Using LED Light (Li-Fi)

Resistor 220 ohm

Arduino UNO

Rotary potentiometer (generic)

LED (generic)

Tactile Switch, Top Actuated

LDR, 5 Mohm

<p >I wanted to transfer data between two arduinos wirelessly using an unconventional method. I decided to use a LED as a transmitter and receive the data by an LDR. I wrote a simple protocol to allow for reliable data transmission. With minor modifications this project can also be adapted to transfer data using fiber optics. I encourage you to try this and share your implementation!</p><p >The implementation is quite simple and I try to explain everything in the video below. Anyone can make this in less than 30 minutes. </p><div class="se-component se-video-container __se__float-none" contenteditable="false" style="width: 100%;"><figure style="width: 100%; height: 56.25%; padding-bottom: 56.25%; margin: 0px;"><iframe frameborder="0" allowfullscreen="" src="https://www.youtube.com/embed/IdU6eCJ9Rh0" data-proportion="true" data-percentage="100%,56.25%" data-size="100%,56.25%" data-align="none" style="width: 100%; height: 100%;" data-index="0" data-file-size="0" data-origin="100%,56.25%"></iframe><figcaption contenteditable="true"><div>Detailed Tutorial</div></figcaption></figure></div><p >Future Plans:</p><p >The LDR reacts quite slow to the changes in light and therefore the data-transmission rate is limited. The LDR can be replaces by a photo-transistor and the transmission rate can be improved.</p><p >If sufficient speed is achieved I will try to transmit digital audio between the two arduinos.</p>

Data Transfer Using LED Light (Li-Fi)

DIY light based transmission between two Arduinos using LED and LDR with custom communication protocol.