What is LiFi technology?
LiFi stands for Light Fidelity. In LiFi technology light is used to transmit the data from one source to another source. In other words, light is used as the transmitting medium in LiFi technology. By using the LiFi technology we can transfer the data within few seconds. LiFi technology is proved very effective in certain condition and it has many advantages, which are listed below.
Advantage of LiFi Technology –
(1) High speed data transfer is the main advantage of LiFi technology. As we all know that the speed of light is very much high compare to any other radio waves, the rate of data transmission is also very quick and fast.
(2) The capacity of data transmission is very much high in LiFi technology.
(3) LiFi technology can be used for underwater data transmission.
(4) By using the light as the transmitting medium we can avoid the problem of radio interference.
What is the use of LiFi?
The main use of LiFi is data transmission. LiFi is very fast compare to other data sharing technology like “WiFi”. By using LiFi we can transfer a small or big amount of data in a very short time. In the previous times data is transmitted through radio waves. But this radio signals interfere with other electronic devices and causes unnecessary problems. To overcome this problem LiFi is used in many area, as the light will not interfere with the other electronic device surrounded around the LiFi machine. Mainly LiFi is used in the sensitive areas, where the radio waves are not allowed for data sharing purpose.
How can I make a LiFi project at home?
It is very easy to make a LiFi project in our home. In this post I will show you the whole process of data transmission from one source to another using LiFi technology. For demonstration purpose I will use an audio file (as data). Then I will transfer the audio file using light (the medium of transmission). At the end I will check the audio file (data) with a speaker (for playing the audio file). Now take a look in all the steps one by one.
Circuit Connection of LiFi Project –
At first you have to take one working headphone. Then cut out the headphone jack from it. Now remove the outer cable from the headphone jack. After removing the outer cable, you can see four different wires. This four wires are responsible for different works, which are listed below.
Headphone jack wire connection –
(1) Green wire is connected with the left speaker of the headphone jack.
(2) Red wire is connected with the right speaker of the headphone jack.
(3) Silver wire is connected with the ground supply.
(4) The remaining wire is connected to the mic of the headphone jack.
For better understanding, take a look in the headphone jack connections given below –
Now connect the wires of left and right speaker together and convert it into one. Also remove the wire of the mic from the headphone jack. Now only two wires are remaining on the headphone jack, which are – combined left and right speaker wire and the ground wire.
Connection between headphone jack and solar panel –
The next step is to connect the headphone jack with the solar panel. So take the solar panel and connect the wires of the headphone jack as instructed below –
(1) Connect the combined left and right speaker wire of the headphone jack with the positive terminal of the solar panel.
(2) Connect the ground wire of the headphone jack with the negative terminal of the solar panel.
Connection between headphone jack and LED –
Now you have to take another headphone jack. Then customize the connections like the previous headphone jack. After this take one LED (Light Emitting Diode). It is always preferred to use a white LED for this project. Also you need some other circuit components like – 220 Ohm resistor, 9 volt battery and battery connector. Now do the connections as mentioned below –
(1) At first connect the ground wire of headphone jack with the negative terminal of LED.
(2) Then take the 220 Ohm resistor and connect it with the positive terminal of LED.
(3) Now take the battery connector and connect it’s positive terminal with the other end of the resistor.
(4) At last connect the negative terminal of the battery connector with the speaker wire of the headphone jack.
Now the circuit is ready to work. Only we have to provide the battery supply, and the circuit will start working. Before giving the battery supply, I put the whole circuit in two different frames. It will make the circuit more efficient and the performance of the circuit will increase. This will also enhance the look of the project. Now take a look at the picture given below –
Testing of LiFi Project –
Now take a 9 volt battery and connect it with the battery connector. Then take the headphone jack (which is connected with the LED) and put it in your smartphone. Connect the other headphone jack (which is connected with the solar panel) with any speaker. Now play any song in your smartphone. The LED light will start glowing. Take the solar panel and keep it closer to the LED. Now you can hear the sound of the speaker that you have connected with the headphone jack. You can hear the same song from the speaker which you have played on the smartphone. If you take the solar panel more closer to the LED light, the intensity of the sound will increase. When you block the light of the LED, the circuit will stop working and there is no sound coming from the speaker.
It means the song (data) is transmitted through the light and this light is captured by the solar panel. As a result, we can hear the same song from the speaker. Similarly we can transmit any other data by using the light. And this is the main objective of the LiFi project.
