Category Archives: Electronics

3D Technology for TVs

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Let’s face it: everybody a little kids – even the most inveterate of us tough and – when the movies 3D surrounds us with its ghostly special effects. So natural that many came the idea that you can have in the comfort of your home something like that, and since the home 3D is a proven reality we see all to figure out what it is.

3D technology for TVs

The unique charm of 3D technology has captivated everyone, but certainly not everyone knows that there are several types to choose from before buying, and that sometimes the differences – that prices – are abysmal: Let’s start with the most common, i.e. those which require the presence of a pair of glasses.

There are two types of 3D technology with glasses: the active and the passive, both with their strengths and their weaknesses. Let’s start with the active: spectacles costing relatively little, are compatible with different brands and types of TV – non-trivial thing – weigh and clutter up shortly and also even after hours of use does not tire the view. The speech is rather different for the active 3D glasses, which have a number of very different characteristics, if not opposed in certain cases.

3D technology for TVs: which one to choose

Active 3D technology has in fact from his less defects like ghosting or cross talking compared to passive, but from a certain point of view the end user “pay the price”. What? First, directly in the store, because you have to pay to buy them a lot more than a couple of passive glasses. Also it is a thicker and much heavier and accessory that goes specifically synchronized with the TV, which also must be compatible.

The faster you pay also with a little eyestrain: better not to go beyond the 4-5 hours of continuous viewing transient penalty but pesky annoyances in the eyes. There’s no way so enjoy the 3D technology without these glasses a little uncomfortable?

In fact, you. Just recently the big companies are starting to get the first few markets TV models with built-in 3D technology and which does not require any type of accessory: How do they work exactly?

Basically don’t need glasses because you directly on your TV there is a kind of film can do da lens through which then our eyes perceive the magic of 3D. The cons of such a wonder?

There are and there are many. The first, is the price: for models currently on the market is called an outflow not less (roughly) to eight thousand euros. The second, is the surrender: we are still far from achieving a 3D even remotely comparable to the effects obtained in movie theaters and the road ahead in this sense will still take some time.

What is the active 3D in TVs

Let’s start by saying that in the present state of things, the vast majority of 3D TVs on the market it should be used in combo (combination) with special glasses: 3D TV without glasses are starting to look at but this is still a rather immature technology and, just between us, expensive.

Therefore when purchasing TV & glasses everyone is facing a classic choice. Making the decision to purchase a pair of glasses with passive 3D staandard-cheap, lightweight, very easy to use – or opt for the more modern and technologically active 3D avanzaro? In many choose the latter, let’s figure out together the pros and cons of this type of innovative accessory.
Active 3D, pros and cons

We can start with tell you that if you choose to bring a 3D active system will have to prepare psychologically to the fact that indeed is a bit more expensive. Good news is that it is compatible with all types of TVS currently on the market: LCD, LED, and also the most modern Plasma.

Active 3D technology provides that the glasses – who need their own separate power supply – are synchronized with the TV so that I can run that game alternating opening and closing image in the two eyes that, at the end, “tricking” your brain creates the 3D effect.

What’s left to say yet about the 3D active? We also observe some disadvantages, in addition to the price: the active 3D makes the pictures a bit darker than they actually are, and this for anyone who uses Plasma – by their nature can play better on black – it could be a problem.

And the hassle? In fact using goggle for several hours continuously active 3D type you encounter some eyestrain, fatigue than with passive glasses in fact does not manifest itself but, let’s be clear: any film lasts well below at 5 hours and beyond which are used to make this type of effects!

Continuing our series, we find also another small flaws of active 3D glasses: the footprint. In fact since their autonomy and their glasses with a chip inside inevitably don’t weigh very little.

Returning to the benefits of this technology, we can not forget the most hated ghosting and crosstalk: respectively the display of faded images and interference between the image intended for one eye and another image destined to the contralateral side. We are happy to tell you that these are two scourges that afflict more than anything else the users of passive 3D and it is very rare that these phenomena occur with those who use the other type of glasses.

How to Use The Launchpad

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The Launchpad is a very useful tool to DJ and those involved in electronic music, even at an amateur level and allows you to play a song or musical sequences. It consists of 64 keys and each of the buttons correspond to a preset sound via computer. So what of it and how to best use the Launchpad, even if you are novice to the world of electronic music DIY.

Launchpad, as its name suggests, means “launch pad” and this tool is a very useful accessory to those involved in electronic music at the professional level and also for those novice, wants to start taking the first steps in this context as a hobby.

The launchpad is a medium sized accessory that is shaped like a tablet, comes with 64 keys, each of which corresponds to a sound, your computer sets via your computer thanks to special software, and allows you to play your favorite songs, or inventing new through the composition.

To use the Launchpad you need to be very handy with his hands and fingers especially, because to play a song you have to master all 64 keys that make up the keyboard of the Launchpad. Each key corresponds to a preset sound to the computer and to create the correct musical sequence is essential therefore know to perfection each of these.

To use the Launchpad in the right way, the first thing to do is plug it into your computer via USB cable, which is typically provided along with the Launchpad. If not, you can use any other compatible USB cable.

Along with the Launchpad, at the time of purchase, also comes the software needed for operation of the instrument; the software recognizes the launchpad automatically, although, in some cases, you may need to enable the hardware according to the directions to download it directly from the menu.

When the Launchpad will be connected to your computer properly, you can begin using it; each button can be customized at will, even according to your own way of moving your hands or fingers, even if you are left-handed.

Each key is also a color; yellow for the clip, playback phases green and red for the registration phase. The colors, of course, are only indicative and may change according to the models: what matters is learning right now to familiarize yourself with the settings and options.

At the beginning may seem difficult and complicated operation of Launchpad, but it is just to do a little bit of practice, and compose the songs you desire will become simple and intuitive. With the Launchpad you can compose the songs you want, then replaying them or create original tracks. Who is able to play one or more musical instruments, especially if a keyboard, will obviously be more benefited, as he will be a little less those starting from scratch, although everything is solvable with just a little practice.

Typically, the first horizontal row of keys contains the procedures to set up the clips, while the central area is used to control change and numerical variation according to the settings you created. Each clip corresponds to a track and you can scroll the workspace moving with the four arrows in the left side of the controller. The central area is divided into two operational areas; the first four rows of the top Act on the clip, while those of the bottom serve to activate the audio channel, stop and mute.

The Electron Microscope Can Magnify An Object

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An electron microscope is a device for watching with a very high resolving power, which allows you to take a close look at samples of sizes extraordinarily small, almost infinitesimal, thanks to the wave properties of one or more electron beams.

The main features of an electron microscope

In parallel with the geometrical optics we have seen the development of a new branch of optics that p was called optical electronics and taking Foundation by the thought of physical scientist called De Broglie. It was 1024 when the scholar was based on the concept of photon, which assigned in light of material properties, to formulate the hypothesis that the material particles could behave like light beams, and can then be equipped with wavelike properties.

Based on this thinking it was possible to create an electron microscope that works by sending the sample to be analyzed an electron beam and analyzing the figures of diffraction which arose. The main advantage of this type of instrument obviously lies in a very high resolving power, which becomes as big as big is the wavelength de beam of light used. Visible light has a wavelength whose value is around an average of around 5000 in, while an electron beam accelerated to about 100 kV has a wavelength of approximately 0.05 to: This means a greater resolving power of about 100,000 times!

This powerful tool allows us, therefore, to observe the minimum facilities and the smallest details that it would be impossible to capture using a normal light microscope, however powerful it may be. The amazing results of an electron microscope are amazing especially as regards studies in biology, metallurgy and medicine.

As regards the technical characteristics, this instrument consists of an electron source, a lens that acts as a magnetic capacitor and that serves to focus the electron beam on the sample you want to observe, from a magnetic lens that acts as a lens, from another magnetic lens always acting as projector and blocking electrons in optical system field , and finally from an item you need to collect the images returned from the microscope, which can then be a photographic plate, a film or a fluorescent screen. The entire system is maintained under vacuum to prevent unwanted electron beam disturbances may occur.

How does the electric microscope

The source of electrons in an electron microscope is represented by a very thin tungsten filament V-shaped, whose negative potential difference is maintained between 30 and 100 kV. The electrons then pass into magnetic capacitor through a hole that is in the anode; the capacitor is intended to adjust the intensity of the electron beam convergence.

The electron beam must be hitting the sample to be observed, which then undergoes the diffraction. Sample parts that cause greater deviation of radiation are thicker and denser ones, which are then darker in the resulting image. To adjust the sharpness of the image you make a current regulation, more precisely in the winding magnetic lens. By replicating this action on the projector you can adjust the magnification of the image.

Scanning electron microscope (SEM)

In this variation of electron microscope, electron beam strikes the sample causes the emission from the same sample of many particles, among which there are also secondary electrons. They are to be identified by a special detector, before being converted into electrical impulses. In this tool the electron beam is not fixed but scanned: ç passes, that is, the sample line by line, into a sequence of rectangular areas.

The transmission electron microscope (TEM)

In this type of electron microscope on the electron beam, before hitting the sample, pass in an area where it has been artificially created a vacuum, and only after passing through the test material.

The ion microscope

The ion microscope is a variation of the electron microscope, built in 1936 by a scholar named Muller. The microscope is the most powerful of all ion microscopes and provides resolutions of the atomic level, with a magnification of about 1.000.000 of diameters.

The ion microscope consists of a cathode with a needle-like tip, on which is sited the specimen to be observed, contained in a small spiral. Then there is a heating which allows a vacuum evaporation; This process creates a very strong electric field between the cathode and the anode, which is intended to accelerate positive ions that originate from the sample to be examined. These ions then strike a fluorescent screen that allows you to view an enlarged image of the area being examined.

This complex instrument is used primarily to examine the surfaces of compound patterns conductors, metals and alloys, as well as for examining phenomena such as catalysis.