Phoenixer Asia

What is double Microphone noise reduction technology? Today we hear some mobile phone manufacturers mentioned "double Microphone noise reduction technology" at the press conference or phone functions, some people may wonder, in fact, very simple, is to use two microphones to reduce background noise when talking, here is detailed double Microphone noise reduction technology works. Dual mic noise reduction technology works "Anti-noise dual mic technology" means technical processing, it will eliminate outside noise, where the "technical process", that is, two built-in microphone. Main microphone pick up sound waves, a clear call to ensure the stability, the assisted microphone to eliminate noise. The phone even in noisy downtown, call quality is still clear. How to achieve dual mic noise reduction? The phone has the same A, B two performance condenser microphones, where A is the main microphone for picking up a voice call.B is the background sound pick...

By:Prayag Nao A mouse is something you push along your desktop to make a cursor (pointing device) move on your screen. So what a mouse has to do is figure out how much you're moving your hand and in which direction. There are two main kinds of mice and they do this job in two different ways, either using a rolling rubber ball (in a ball-type mouse) or by bouncing a light off your desk (in an optical mouse). i am going to explain how does a ball type mouse work.If you want read working of optical mouse read my post on. How do optical mouse works ? Inside a ball-style computer mouse Traditional mice have a rubber ball inside them. Open one up and you can see the heavy ball clearly and the spring that keeps it in position. Here's the inside of an old-style Logitech ball mouse: Switch detects clicks of left mouse button. Switch for middle button. Switch for right button. Old-style connection to PS/2 socket on computer. Chip turns back-and-forth (analog) ...

By:Prayag Nao We all have a basic idea about the purpose of each wire going in and out of our computer. But a few wires seem a bit off when it comes to their appearance. They have a cylindrical bead dangling near the end. So what’s this bead doing on that wire and what purpose does it serve? Today, we are going to unravel this mystery for you. You will not only find this bead at end of charging cables but also mouse, keyboard and other peripheral cables. It turns out that lump’s called a ferrite bead or, more generically, a choke. It’s a fancy name for what’s basically an electromagnetic wave-bouncer. If you open this bead, you will not find any complex circuits but only a ferrite cylinder that is magnetic in nature. It is this magnetic quality of the bead that serves the purpose. So basically, when current passes through any cable, it generates electromagnetic interference (EMI). Your electronic gadgets also produce EMI during operation....

By:Prayag Nao In this Post I’m going to write about missile guidance systems . This will be a high level look to give an appreciation of the concepts and techniques used. NOTE : If you work in the defence industry, please don’t email to remind me it is a little bit more complicated than I have explained it here! Before we start, it's worth taking a step back to find out a little more about this subject. What is a missile? The first question to answer is what a missile is, and what distinguishes it from a rocket, bomb or other projectile weapon? The simple answer is that a missile has a guidance system to allow it to steer and change course towards its intended target, and also a propulsion system that self drives it. Non-Powered Powered Guided Smart-Bombs Missiles Non-Guided Bullets Rockets Munitions that are not self-powered and have no self-guidance are things like bullets, arro...

By:Prayag nao W e can't always generate electricity where and when it is needed so batteries, devices that store electrical energy in chemical form, are very important. Many different types of batteries are produced for a wide variety of applications, from storing solar power for satellites in space to powering heart pacemakers fitted inside people's chests. You might think a battery looks just about as dull as anything you've ever seen. But the minute you hook it up to something, it starts buzzing with electricity. That dull little cylinder turns into your very own micro power plant! Let's see what's going on in there... Anatomy of a Battery   Take a look at any battery, and you'll notice that it has two terminals . One terminal is marked (+), or positive, while the other is marked (-), or negative. In normal flashlight batteries, like AA, C or D cell, the terminals are located on the ends. On a 9-volt or car battery, however, the termin...

By:Prayag nao How does coil gun works ?. Have you ever think about it,Probably yes,if not don't worry i will tell you working of coil gun.Before we start to learn coil gun working,we have to know some basics phenomena behined it.Let's start........ Magnetic Field of Current The magnetic field lines around a long wire which carries an electric current form concentric circles around the wire. The direction of the magnetic field is perpendicular to the wire and is in the direction the fingers of ...

By:Prayag nao T elevisions used to be hot, heavy, power-hungry beasts that sat in the corner of your living room. Not any more! Now they're slim enough to hang on the wall and they use a fraction as much energy as they used to. Like laptop computers, most new televisions have flat screens with LCDs (liquid-crystal displays) —the same technology we've been using for years in things like calculators, cellphones, and digital watches. What are they and how do they work? Let's take a closer look! How does a television screen make its picture? For many people, the most attractive thing about LCD TVs is not the way they make a picture but their flat, compact screen. Unlike an old-style TV, an LCD screen is flat enough to hang on your wall. That's because it generates its picture in an entirely different way. You probably know that an old-style cathode-ray tube (CRT) television makes a picture using three electron guns. Think of them as three very fast, very...

By:Prayag nao The Tesla coil is well-known for producing extremely high voltages. In this section, we’ll explain how the Tesla coil can reach voltages over a quarter million volts using coupled resonant circuits. We’ll build up from the fundamentals, to give you a thorough explanation of what’s going on. Current, Magnetic Fields, and Inductio n Let’s start with the basics of electromagnetism. One of Maxwell’s equations, Ampere’s law, tells us that current flowing through a wire creates a magnetic field around it.  If we want to use this magentic field to our adavantage, as we do in an electromagnet, we coil the wire.The magnetic fields from the individual turns add together in the center. A constant current makes a static magnetic field. What happens with we put a changing current through the wire? Another of Maxwell’s equations, Faraday’s law of induction, tells us that a magnetic field changing in time induces a voltage across the wire proportional to...