Output device and input. The main device input/output information

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2018-03-27 11:52:18

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Every day, sitting down for your workplace at the office, a person takes in one hand a mouse and begins to perform their duties. He knows what he needs keyboard, printer, scanner, however, cannot even imagine what they have in their official name. These are all input devices and output information.

How it works

All devices in the personal computer are controlled by the CPU. For interoperability with a device output and input submit requests to the South bridge logic element of the motherboard. It serves to provide connection and processing requests from external devices to the North bridge or the CPU, if the bridge is missing.

In General, the study of the structure of the personal computer engaged in computer science. Input devices and output it defines how components of a typical personal computer, and provides the relationship of the user with computers. But before proceeding to the description of all devices, special mention deserves the basic device I / o. It is the same - BIOS. This chip on the motherboard of a personal computer provides an initial check of all connected devices and load the operating system.

Classification

The input and output of information a personal computer can be classified in different ways. The determining factor for this will be their responsibilities.

The First paragraph denote the main device input / output. In fact, there could be only one item - a keyboard, because without it, none of the custom computer will not continue booting. You can completely disable the monitor and mouse, but no keyboard the computer will not work. With the exception of server machines which work even without connected external devices. Thus, the basic device I/o, without which a normal user will not be able to work is:

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  • Keyboard;
  • Monitor;
  • Mouse.

You can Also provide additional input devices-output:

  • Printers;
  • Scanners
  • Joystick;
  • Project;
  • Also to device I/o are audio device.

This is not a complete list of possible devices that interact with the user, listing them can be very long. So let's look at the device I/o computer in more detail.

Monitors

Computer monitors in its history has undergone many changes. Starting from the old, using a cathode ray tube, to a modern LCD.

By Itself, the monitor or display is a device used to output graphical information to the end user. They can be classified according to several characteristics.

1. By type of information.

output and input

  • Alphanumeric. These displays are designed to output solely textual information.
  • Graphic. With these monitors we face every day, sitting behind a personal computer. They are intended to represent the information in graphical form, including video.

2. The type of screen.

  • CRT. Monitor based on cathode-ray tube, so you may have worked in 2000.
  • LCD - liquid crystal flat display, now used everywhere. Also, this type of monitors used in laptops.
  • A Plasma.
  • Laser - mass production has not yet been received.

Keyboard

What about keyboards? Fantasy producers in this area has leaped forward, and the sense of humor is pushing for the most daring experiments.

Among the keyboards you can meet and minimalistic options - without additional side panel with numbers, and a huge gaming keyboard with built-in joysticks, extra buttons and speakers. Meet keyboard with additional USB connector and a pink keyboard with a "random buttons" for "blondes." There are also silicone folding keyboard to make it easier to carry, or just folding three times.

If you are going to buy a keyboard, just go to a computer store and choose the one that you like.

input devices and output

Mouse

A Computer mouse is a input device/output of the computer, without which you can not work a normal user. If an advanced user can navigate through folders and files, and some programs and games only using the keyboard, the average person is simply not able to do it. For all time of existence of the computer mouse has undergone a not so strong changes.

First the mouse worked on the ball at the base. Moving it in different directions, the ball was rotated and controlled by the controller.

Then he was replaced by the optical mouse-based LEDs. The first generation optical mice required a special mousepad, which was caused the hatch contributing to increased svetozarevska surface. Moreover, the first mouse mats were personal, they could not be replaced by others.

input devices computer output

The Second generation of optical mice has a more complex device. On the bottom of the mouse includes a mini-camera,continuously performing microsemi surface and comparing them with each other to determine the displacement of the device.

More new device are a semiconductor laser mouse. Among their advantages are low power consumption, reliability, absence of lighting.

Another variant of the mouse found in the form of additions to the graphics tablet. Such induction of the mouse is awkward to use because they cannot be replaced by more comfortable, the hand and the improved accuracy when a small opportunity to move away with her to a distance from the tablet.

Printers

This is the output device information to the printer. For all time of its existence, the printers haven't changed much. The technology is evolving, to replace the inkjet printers come laser, but previous generations continue to live. What is it caused? The fact that different types of printing suitable for different types of printers. They all perform one function and do not differ much in design. There are following types of printers:

Informatics input devices and output

  • Matrix;
  • Jet;
  • Laser;
  • Locks.

In choosing such a device, people tend to have personal preferences and habits. However, if you are going to print pictures, not only text documents, then you are more suited to laser due to the increased print quality.

Scanners

main device input / output

The information input Device to the computer. The peculiarity lies in the fact that the scanners make the information in the PC exclusively in graphical form. The development of scanners has stalled solely on resize. First, they became smaller and smaller, and then they were replaced by a huge "harvesters" - the device output and input, combining copier, printer and scanner.

Sound

Each of us likes to watch movies, listen to music at home. Speakers, headphones, audio systems and home theaters, as well as headsets and microphones - all of this applies to audio output devices and input.

There are many different microphones and speakers, distinguished by the quality of the audio recording or playback, respectively. Probably, any man can determine how well the sound of that particular speaker. When choosing a audio system is also recommended to follow the design and power to your taste.

advanced device input / output

Videos

For working with video graphics provide a special output device and input camera's and projectors.

The Projector - a device designed to create an image of the subject on the big screen. There are the following types of projectors:

to the devices input / output includes

  • Slide. The image appears due to the passage of light rays through the transparent film with the picture.
  • Episcopacy. Creates an image by projecting the reflected light rays.
  • Overhead creates the screen image as transparent and opaque objects.
  • Multimedia project is directly related to the topic. This output device graphical information from the computer on a large surface.

As for the cameras, then does anyone suggest not. In most cases, the higher the resolution, removing the camera, the better the finished picture. With the advent of laptops, USB cameras have become replaced with built-in laptop monitor.

Tips

After Reading this article, you learned what are the output devices and input on what types they are classified and what are their views relevant today. If you are going to set up your working and game place, as well as to choose the device that you want to have a home on hand, then this article should help you with the selection of gadgets.

When visiting a shop remember that the sellers can offer you something more expensive or already stale, outdated product. Do not be lazy before going to go online and read customer reviews on various models of external devices.

Remember the main rule of the buyer: more expensive does not mean better. In a computer store, buying a printer or headset, you may overpay for the brand, and then long to regret my purchase.

An Example is the HP printers. Yes, they are among the best, but the replacement ended cartridge or just a little malfunction is gonna cost you a pretty penny only because of the fame of the manufacturer.

When buying a sound system do not hesitate to check the sound and performance of speakers. And if you are going to buy a webcam, then a test image, since it is not always stated in the documentation, the resolution can match available.

And most important rule. When buying any product, check with the seller's warranty. For example, some devices require the services box, which supplied the unit. A vivid example - laptop "ASUS". In most cases anywhere on the store website does not specify the information that manufacturers require the original box when you call the service center.

Be careful and have a nice shopping!


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Alin Trodden - author of the article, editor
"Hi, I'm Alin Trodden. I write texts, read books, and look for impressions. And I'm not bad at telling you about it. I am always happy to participate in interesting projects."

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