Author Archives: techexplainer

Understanding Wi-Fi Direct

We all know that a traditional Wi-Fi network is based on the presence of a wireless access point or a router and these access points basically perform three functions: physical support for wireless and wired networking, routing between devices on the network, and adding and removing devices from the network. But what would you say if one told you about a technology, a Wi-Fi technology, which does not require any router or AP, you would get pleasantly surprised. That is what the new age technology called Wi-Fi direct is all about.

Wi-Fi Direct

Wi-Fi direct is a standard, which has been developed by Wi-Fi Alliance. The standard allows two or more devices to interact directly without the presence of wireless access points or routers. The said devices can then perform several tasks such as printing, syncing, share files and many more. With Wi-Fi direct enabled devices you can play games with your partner without the physical connection between the two devices of yours. And when I say devices they could be anything from smartphones to laptops to cameras to printers to projectors to TVs.

Wi-Fi Direct

But one has to keep this fact in mind that the Wi-Fi direct has not been developed with the intention of replacing the existing standard because the Wi-Fi direct has its own set of bottlenecks such as it is not as secure as the normal standard, then it is a little difficult to control and regulate.

The main function of Wi-Fi direct is mobile sharing with less effort. Let us take an example: if we have to display some of the pics that is on our mobile phone to our Wi-Fi direct enabled TV, with the help of the said standard we can do the same without getting involved in the quagmire of passwords and establishing connection, which we need in the older standard.

Reading Lists:

Samsung Galaxy S III – Features and Images

Bluetooth with A2DP Technology

Active Noise Cancellation Technology

HTC Desire C: First Impression and Review

Leave a comment

Posted by on May 21, 2012 in New Age Technology


Tags: ,

What is ActiveSync?

ActiveSync is a mobile data synchronization technology and protocol developed by Microsoft. It is a program, which allows mobile devices to be synchronized. It is a bridge for data transfers between computers and mobile devices. It helps mobile devices in transferring documents, files, photos, contacts, calendars, and emails to and from the computer with ease. With ActiveSync, mobile phone is transformed into a pocket PC.

Microsoft provides two types of technology for data synchronization.

Desktop ActiveSync:

Data and information of handheld devices are synchronized with a desktop computer.  Apart from with limited backup/restore functionality, and the ability to install and uninstall mobile device applications, ActiveSync also provides for the manual transfer of files to a mobile device. Users need to connect the mobile device with the desktop to synchronize the data. Supported mobile devices can be Smartphones and PDAs running Windows Mobile, or the Windows CE operating system and other operating system.

It is to be noted that all Personal information manager (PIM) data including Email, Calendar, and Contacts can be synchronized with the ActiveSync but Tasks. Synchronization of Tasks is allowed only on Windows Mobile 5.0 devices.

ActiveSync doesn’t support all features of Outlook. Contacts grouped into subfolders are not transferred with ActiveSync.

Exchange ActiveSync:

Exchange ActiveSync provides push synchronization of contacts, calendars, tasks, and email between ActiveSync-enabled servers and mobile devices. It synchronizes directly with Microsoft Exchange Server and lets users keep e-mail, calendar data, tasks and contact information updated wirelessly via Wi-Fi or cellular network.

It is a proprietary protocol, which is licensed to a number of mobile manufacturing companies such as Apple, Palm, and Google. These companies can incorporate Exchange ActiveSync in their devices.

Many brands including Apple, Nokia, Sony Ericsson, and Sony offer products that are compatible with Exchange ActiveSync.

Leave a comment

Posted by on May 17, 2012 in Uncategorized


Tags: , , , , ,

Windows Phone OS Vs. Android OS

Windows operating system is the undisputed king in the world of computers, it is the kingpin. But when it comes to the mobile phones the scenario is not that bright. Windows has to make space for itself in the presence of two giants: iOS and Android.

Android vs Windows

The Windows Phone OS is a relatively new player in the world of mobile handsets. It is approximately two years old in the market, and as far as the mass use of the OS is concerned, it appeared at the Mobile World Congress 2011 with the Nokia handsets, the Lumia series. And with the Nokia Lumia 800 and Nokia Lumia 710 the Windows Phone OS was supposed to take off, but somehow it did not respond accordingly to the high anticipation of the tech world. Let’s find out how and why it lags behind the giant Android.

First and the foremost reason is like the Android, Windows does not enjoy the flurry of vendors who give the users a wide range of choice, all the way from 3000 bucks to the 40000 upper crust. Windows phones are only for the thick walleted folks. And it is simple; number of handsets sold is directly proportional to the number of operating systems in the market.

Second and equally important thing is the Windows OS does not come up with something new all the time, which the users demand at the time of purchasing a handset. Yes, it has the Metro UI but that is a complex thing, not meant for the common place people. On the other hand Android comes up with a new app every now and again (no matter useful for the users or not) to woo the purchaser.

Android vs Windows7

One more thing that needs to be emphasized is that the companies like Nokia, HTC, and even Samsung offer only two or three handsets that run Windows Phone OS that not just cramps the users for choice but they are not stylish and trendy handsets. If we look at Samsung, we find that the Android handsets are far better looking than the Windows phones.

The foresight that Google invests in the Android is commendable, after the super success of the ICS 4.0 is already planning to unveil the Android 5.0 whereas the Windows OS is still holding on to the 7.5 Mango.

And the story is the same for the Windows based tablets. I would like to say that the road is far more difficult here than in the handset sphere where the monster called Apple is as well established as God in heaven. Though, there is some hope for the Windows after the release of the Windows 8, but the hope is now looking like a thin shadow of something that is not confident of its own success. Let us see what happens.

Folks, you might like to read:

Wireless Charging: Pros and Cons

Bluetooth with A2DP Technology

Active Noise Cancellation Technology

Defining LED Display

Leave a comment

Posted by on April 16, 2012 in Mobile-Technologies


Tags: , , ,

Wireless Charging: Pros and Cons

We are living in a world of wireless technologies. When smartphones, tablets, and laptops have become an integral part of most of the people living in this world, have we got freedom completely from the hassles of cords and wires? Still the answer would be “no”. I’m sure; you all will be having a USB cable or charger in our bag to charge the mobile phones or laptops. With the advent of wireless charging- a technology, which is not commonly adopted, life of those people who like to work on the move is slowly revolutionizing for the better.

What is wireless charging?

There are two types of wireless charging: inductive and conductive charging. The inductive charging technique involves an electromagnetic field to transfer charge across a gap and into the device’s battery. The requisite for the inductive charging is an induction coil, which is capable of receiving the wireless energy. On the other side of the table, the conductive charging functions on the direct electrical contact between the power source and the battery.

Inductive Charging

The conductive charging pad contains a conductive panel that gets connected to the similar conductive material on the users mobile device’s aftermarket backs. Big players of the field are: Duracel, Powermat USA, RadioShack. But the inability of the conductive charging pads to get set on the car dashboard and the tray tables of the aeroplanes might prove to be a big bottleneck fot the users.

The inductive charging seems to be scoring over the conductive charging these days. Samsung, LG, RIM, and Motorola are all part of the Wireless Power Consortium, and they all back the inductive charging standard. Since the inductive charging does not need the conductive surface, it allows itself to be mingled with or under any kind of materials. The Wireless Power Consortium takes the inductive standard of charging as the future of wireless charging.

Conductive Charging

The main bottleneck of the wireless charging is the low performance of the batteries and extra heating in comparison with the conventional way of charging. One big disadvantage is the expensiveness of the wireless chargers at the present moment, but that will be taken care of as the demand grows.

This video demonstrates the functioning of the Wireless Charging.

You might also like to read:

Resistive vs Capacitive Touchscreen

Bluetooth with A2DP Technology

Active Noise Cancellation Technology

Leave a comment

Posted by on April 9, 2012 in New Age Technology


Tags: , , ,

Resistive vs Capacitive Touchscreen

This article will help you in understanding the basic differences between Resistive & Capacitive touchscreen.

Resistive Touchscreen

A resistive touchscreen comprises of several layers, out of which the flexible plastic and glass layers are two important electrically resistive layers. The front surface of resistive touchscreen panel is a scratch-resistant plastic with coating of a conductive material (mostly Indium Tin Oxide, ITO), printed underside.

The second important layer is either made of glass or hard plastic and is also coated with ITO.

Both the layers face each other and are separated with a thin gap in between. An electrical resistance is created between both the layers in such a way that charge runs from top to bottom in one layer and side-to-side in another.

When a finger or stylus tip presses down on the outer surface, both the ITO films meet. It is the measure of the resistance of both the layers at point of contact, which leads to get an accurate measurement of the touch position. The accuracy also relies on the evenness of the coating of ITO on both the layers.

Advantages of Resistive Touchscreen

  • Low production cost
  • High resistance to dust and water
  • Best used with a finger, gloved hand or stylus
  • Best suited for handwriting recognition

Disadvantages of Resistive Touchscreen

  • Not too sensitive, you have to press down harder
  • Poor contrast because of having additional reflections from extra layer of material placed over the screen
  • Does not support multi-touch

Phones with Resisitive Touchscreen

Spice Mi-270, Nokia C2-02, Samsung Star Duos, Spice FLO, LG P520, Nokia C5-05, LG Cookie Joy, Samsung Champ Duos, Nokia C2-02

Capacitive touchscreen

A capacitive touchscreen also consists of two spaced layers of glass, which are coated with conductor such as Indium Tin Oxide (ITO). Human body is an electrical charge conductor. When a finger touches the glass of the capacitive surface, it changes the local electrostatic field. The system continuously monitors the movement of each tiny capacitor to find out the exact area where the finger had touched the screen.

Advantages of Capacitive Touchscreen

  • Because capacitive touchscreen has glass layer instead of plastic, it looks brighter and sharper
  • Highly touch sensititive and doesn’t need a stylus
  • Supports multi-touch

Disadvantages of Capacitive Touchscreen

  • Because the technology is dependent on the conductive nature of human body, it doesn’t work if the user is wearing gloves
  • Because of having a complex structure, these are quite expensive
  • Glass is more prone to breaking

Phones with Capacitive Touchscreen

HTC Incredible S, Apple iPhone 4S, Spice Mi-310, LG Optimus Black, HTC Sensation, HTC Explorer, Samsung Omnia W, Samsung Galaxy Ace Plus, Samsung Galaxy Note, Samsung Galaxy SII, Nokia Lumia 800

Leave a comment

Posted by on April 2, 2012 in Uncategorized


HTC Media Link HD vs Apple AirPlay

These are two similar technologies that you can use to transfer music, movies, and photos between mobile and TV.

HTC Media Link HD

HTC Media Link HD is a small box, which hook up to a high definition TV or monitor using an HDMI cable and wirelessly connects with HTC Sense 4 devices to allow users mirror the action from phone display on to big-screen TV. It includes simple gestures to effortlessly navigate between phone and TV display. You just need to swipe three fingers up the on the phone’s screen to send a video/photo to the television. The Media Link HD will support dual-display mode, which implies that one can other functions like web browsing, while streaming video to the TV.  It is sleek and portable device with easy set up option. It works on Wi-Fi network.

HTC has not uttered anything about the pricing and availability, but it is for sure that HTC has a wonderful accessory on its hands – HTC Media Link HD!

Apple’s AirPlay

AirPlay is a proprietary protocol developed by Apple Inc. for wireless streaming of audio, video, and photos. Computer (iTunes 10.2 or later) or iPhone/iPad/iPod (iOS 4.3 or later) connects wirelessly to HDTVs or speakers via Apple TV. With AirPlay set up, users can watch contents from Mac or iPhone/iPad/iPod on HDTV via Apple TV and control them with iOS devices’ Remote app (app that turns iPhone, iPad, or iPod touch into a remote control). Apple TV is digital media receiver from Apple Inc. It has HDMI, Ethernet and microUSB interface and supports connectivity through Wi-Fi as well. It is compatible with HDTVs with HDMI support.

AirPlay works best using Wi-Fi. However, one can go via Ethernet as well, if required.

Which one is the best?

HTC Media Link HD works only with Wi-Fi network while AirPlay is comfortable with both Wi-Fi and Ethernet connection. So, Wi-Fi is must for watching content on HDTVs from HTC phones while an Ethernet connection can also work with AirPlay and Apple TV. HTC Media Link HD let users stream digital contents from only HTC phones and AirPlay fetch music from both phones and computers. So, HTC Media Link HD is a part of small world, and AirPlay is big player in Apple ecosystem.

Leave a comment

Posted by on March 30, 2012 in New Age Technology


Bluetooth with A2DP Technology


With the rapid advancement in science and technology, the world of machines has, in the last decade or so, changed upside down. From the rickety machines to the suave ultraslim laptops, we have witnessed it all, in front of our own eyes. Nothing has remained the same. But one perplexing thing has, till now, not ceased to exist- the cable.  From the charging purpose, to connecting device to receive bigger amount of data, the piquing cable has been found to be ubiquitous.


But, with the advent of A2DP, the headphones can play music for you without being connected to the music player physically. The obnoxious cord seems to be losing its value in this case. Let’s find out how.

The Functionality

The reason that the A2DP enabled device doesn’t need physical connection with the device is that it has a receiver with an inbuilt battery. In order to get properly acquainted with Advanced Audio Distribution System (A2DP), we will have to know that it is a set of standards for devices, which have Bluetooth. We don’t need to mention that Bluetooth is the same technology that is used in the mobile phone headsets and wireless computer keyboards.

Bluetooth with A2DP

In the simplest terms, the A2DP is a profile that enables the user to stream high quality audio over Bluetooth. The A2DP offers a unilateral stream of high quality stereo sound, not like the conventional Bluetooth devices that do it bilaterally. And one more thing that makes it different is that it is digital. All that the user has to do is to pair the device with the music playing machine, and lo, it is all done. And what else, there can be more than one device connected without being entangled.

One thing here is pretty important to emphasize that not all the latest Bluetooth versions are A2DP enabled; so, those who want the A2DP on their Bluetooth devices should do ample research before going for it. There is one more thing that a music lover should keep in his mind that if he is nurturing  intentions of buying a mono Bluetooth ear piece then it got to have the A2DP on it else the device will not stream music.

Leave a comment

Posted by on March 29, 2012 in New Age Technology


Tags: ,