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What is Li-Fi? How does Li-Fi work? Wi-Fi vs Li-Fi

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Li-Fi claims to be 100 times faster than standard Wi-Fi. But what exactly is it and how does it work?

…. read on to find out what Li-Fi is, how it works and why Wi-Fi may be a thing of the past. 

Light Fidelity or Li-Fi is a Visible Light Communications (VLC) system running wireless communications travelling at very high speeds. Li-Fi uses common household LED (light emitting diodes) lightbulbs to enable data transfer, boasting speeds of up to 224 gigabits per second.The term Li-Fi was coined by University of Edinburgh Professor Harald Haas during a TED Talk in 2011. Haas envisioned light bulbs that could act as wireless routers.

Subsequently, in 2012 after four years of research, Haas set up company pureLiFi with the aim ‘to be the world leader in Visible Light Communications technology’.

How it works

Li-Fi and Wi-Fi are quite similar as both transmit data electromagnetically. However, Wi-Fi uses radio waves while Li-Fi runs on visible light.As we now know, Li-Fi is a Visible Light Communications (VLC) system. This means that it accommodates a photo-detector to receive light signals and a signal processing element to convert the data into ‘stream-able’ content.

An LED lightbulb is a semi-conductor light source meaning that the constant current of electricity supplied to an LED lightbulb can be dipped and dimmed, up and down at extremely high speeds, without being visible to the human eye. For example, data is fed into an LED light bulb (with signal processing technology), it then sends data (embedded in its beam) at rapid speeds to the photo-detector (photodiode).The tiny changes in the rapid dimming of LED bulbs is then converted by the ‘receiver’ into electrical signal.The signal is then converted back into a binary data stream that we would recognise as web, video and audio applications that run on internet enables devices.

Li-Fi vs Wi-Fi

While some may think that Li-Fi with its 224 gigabits per second leaves Wi-Fi in the dust, Li-Fi’s exclusive use of visible light could halt a mass uptake. Li-Fi signals cannot pass through walls, so in order to enjoy full connectivity, capable LED bulbs will need to be placed throughout the home. Not to mention, Li-Fi requires the lightbulb is on at all times to provide connectivity, meaning that the lights will need to be on during the day.

What’s more, where there is a lack of lightbulbs, there is a lack of Li-Fi internet so Li-Fi does take a hit when it comes to public Wi-Fi networks.In an announcement yesterday, an extension of standard Wi-Fi is coming and it’s called Wi-Fi HaLow.

This new project claims to double the range of connectivity while using less power. Due to this, Wi-Fi HaLow is reportedly perfect for battery powered devices such as smartwatches, smartphones and lends itself to Internet of Things devices such as sensors and smart applications. But it’s not all doom and gloom! Due to its impressive speeds, Li-Fi could make a huge impact on the internet of things too, with data transferred at much higher levels with even more devices able to connect to one another.

What’s more, due to its shorter range, Li-Fi is more secure than Wi-Fi and it’s reported that embedded light beams reflected off a surface could still achieve 70 megabits per second.image003

The future of Li-Fi

In November last year, Li-Fi pioneers pureLiFi joined forces with French lighting company Lucibel aiming to bring out Li-Fi enables products, later this year. pureLiFi already have two products on the market: Li-Flame Ceiling Unit to connect to an LED light fixture and Li-Flame Desktop Unit which connects to a device via USB, both aiming to provide light and connectivity in one device. Plus, with faster connectivity and data transmission it’s an interesting space for businesses. The integration of internet of things devices and Li-Fi will provide a wealth of opportunities for retailers and other businesses alike. For example, shop owners could transmit data to multiple customers’ phones quickly, securely and remotely. 

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Now, Own A Computer In Just $5

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Want to buy a computer but don’t have much money?

We have something which suits your pocket. Though this PC has less powerful specifications, one can undertake routine tasks like blogging, and watching videos on it.

The Raspberry Pi Zero W.

It is a motherboard, which has a 1GHz single core processor and 1 GB of RAM. The processor is powerful enough to do light stuff like typing and watching movies.

Connect with TV.

The raspberry pi zero has a HDMI  outport. So, you can cast anything on to your casting devices like TV, computer. The raspberry pi zero needs an external power supply, which can be supplied from a normal android USB charger.

Components.

The raspberry pi zero doesn’t have internal storage. Therefore, there is need to insert a micro sd card. The pi zero has a 40-pin slot with which you can connect a 40-pin supported device to extend its usage. There is a micro USB slot to connect pen drive, hard disk etc. The pi zero can give an output of 1080p video.

Size.

The pi zero is super compact. You can fit in 20 pi zero in your pocket at a time.

The look when all is set up

You can connect the keyboard and mouse for navigating via micro USB slot. There are many Raspberry PCs in the market. The one mentioned here doesn’t support WI-FI and Bluetooth.

Case.

 

As Raspberry pi zero is a motherboard, you will not want its circuit to get damaged. You can buy case for its protection. The cases are also cheap and fit well.

This comCosts as low as $5.

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Top 8 Most Expensive Watches in the World

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If you love wearing a watch, even though, the new millennium doesn’t need it, thanks to the cell phones which are in their hands all the damn time, the style statement a watch reflects is what nothing else can do. It shows a lot about your personality. And, you might be aware about the intricate details every watch entails. Million dollar watches have expensive stones and diamonds encrusted in them and if you want to make your man happy, and you are also very rich  you could gift him one.

Brequet Pocket Watch 1970 BA/12 – $734,000.

It is a pocket watch which in which 18-karat gold is hand engraved. Along with a silver face, it exhibits a brilliant workmanship.

Blancpain 1735 Grande Complication – $800,000

It is one of the most complex watches in the world as its case is made with platinum, and the watch strap is made out of crocodile skin. Not only that, the engine parts are made of 740 pieces of handmade parts and components.

Louis Moinet Magistralis – $860,000.

This is for the stylish men and this watch contains a genuine piece of meteorite that was found on the moon. Oh My God! Did I just stop breathing!

Hublot Black Caviar Bang – $1 million.

It was a draw dropper when it came out in 2009 but this wristwatch is covered in 501 baguette-cut black diamonds and 18-carat white gold which gives it a classic statement and its regaining is status.

Chopard Super Ice Cube . $1.1 million

This Swiss-made watch would look perfect on an elegant woman’s hand as it has 60-karats of diamonds which are cut into perfect cubes. This luxury watch and bracelet is also water resistant to 100 feet and cannot develop scratches.

Patek Philippe Sky Moon Tourbillon . $1.3 million.

A piece of modern art, it is the most complex wrist watch ever made by Patek Phillipe. With night sky on one side that has precision and being more complex with date and the moon phases, on the front, it is an amazing watch.

Patek Philippe Platinum World Time . $4 million.

Another masterpiece created by Patek Philippe was sold at auction for over $4 million USD in 2002. At the time, it was the most expensive wristwatch in the world and you could know the time anywhere in the world. It sustains a variety of finishes to choose from, yellow, white and rose gold and platinum as well.

Chopard 210 karat . $26 million.

Raise the bar high my friends, as here is the winner. It is so expensive that there is no listing. It has 201 karats of colored diamonds and it looks more like a bracelet. It is a spectacular piece of jewellery first and the time piece looks like its surrounded by flowers.

 

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4 Fun and Creative Smartphone Hacks Photographers Will Appreciate

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Need a little creative boost this week? Here’s a short video that shares 4 fun smartphone hacks that might just inspire you to create something different using the little computer in your pocket as either the camera or a prop.

The video was created by Salzburg, Austria-based filmmaker Matthew Rycroft, and it covers two digital and two physical hacks you can perform with your smartphone. Let’s take them two at a timeDigital Hacks

The first two hacks are digital, featuring the hidden menus found in the Instagram apps Hyperlapse and Boomerang.

In case you’re not familiar, Hyperlapse creates timelapses by speeding up and smoothing out video footage you capture with your phone, while Boomerang creates animated snippets that “boomerang” forward and backwards in time. They’re fun, gimmicky apps, both of which feature hidden menus that can really turn up the fun.

Four-finger tap four times on your screen when you have either of these apps open, and a menu that lets you control framerates, max speeds, and more pops up, letting you capture longer, better, and more unique creations.Physical Hacks

The last two hacks are physical. First, Rycroft shows you how you can create a pseudo-UV effect by covering your smartphone flash with three layers of tape, and coloring over each layer with blue, blue, and then purple.

Combine that with some highlighter art and you a pretty neat UV-like effect:Then, last but certainly not least, Rycroft shows you how a few triangular pieces of transparency can be taped together to create a done for displaying holographic videos on YouTube.

This isn’t specific to photography per se, but you can certainly use it as a neat prop for your next creative macro photography project. Barring that, it’ll distract and amazing the kids long enough for you to maybe get some edits done:

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