Tag: Input and Output Devices

Output Devices

Output Devices

Output Devices when the CPU processes the results, the result must regularly be produced. A standard output screen is a computer monitor, which lights up thousands of pixels in various colors, which displays text, pictures, and user interface features. Any major output devices in a computer have mentioned below.

  • Monitors
  • Graphic Plotter
  • Printer

Monitors Output Devices

The primary Output Devices of a computer have monitored, generally known as Digital Display Unit (VDU). It creates pictures from small dots, called circular pixels. It is image quality differs on how many pixels.

There are two types of monitors.

  • Cathode-Ray Tube (CRT)
  • Flat-Panel Display

Cathode-Ray Tube (CRT) Monitor

The CRT display consists of small pixel-like image elements. The smaller the pixels, the clearer or clearer the picture. It requires a number of pixels, like the letter ‘E’s in the word aid, to shape a whole character.

The screen will represent a limited number of characters at the same time. The screen may have broken down into a number of character boxes – a set position on the screen that allows a normal character. Most displays can display physically 80 data characters and vertically 25 lines.

There are some disadvantages of CRT −

  • Large in Size
  • High power consumption

Flat-Panel Display Monitor

The flat panel monitor is a video class with a lower volume, weight, and power demand than the CRT. They have hung on walls or put on your wrists. Current applications of flat showers include calculators, video games, screens, mobile laptops, and displays of graphics.

Printers Output Devices

Printer is an output system for printing paper material.

There are two types of printers −

  • Impact Printers
  • Non-Impact Printers

Impact Printers

The impact printers print the characters by clicking them on the wire, loaded into the paper afterwards.

Impact Printer characteristics are as follows

Quite a low cost of use
Very channel bottom
It is useful for bulk printing because cheap.
Physical contact with the paper is available to create a picture

These printers are of two types −

  • Character printers
  • Line printers

Non-impact Printers

Print characters without using the circle without an effect scanner. The printers print a whole page at a time and have often referred to as Page Printers.

These printers are of two types −

  • Laser Printers
  • Inkjet Printers

Input Devices

Input Devices

Input Devices only “punch cards” have allowed for the very first devices. Software engineers had to punch their details given and feed them into the computer. Fortunately, machines have lived abroad since the seventies and we can now use various easy-to-use tools to input the data into them. Any of the main input devices used in a computer follow.

  • Keyboard
  • Mouse
  • Joy Stick
  • Light pen
  • Track Ball
  • Scanner
  •  

Keyboard

Keyboard has the most common input device for data entry into the machine. Although there are some extra keys for extra features, the keyboard layout is the same that of the typical notepad.

Two-sized 84 or 101/102 main keys are keyboards, but Windows and the Internet have access to 104 key or 108 keys. Keyboards are available today.

Mouse

The most common indicator system is Mouse. It has a very famous taskbar with a small palm box with a circular ball at its base that detects the mouse and, when the mouse buttons have pressed, sends the latest content to the CPU.

It has several keys, called left and right, and between the buttons, there is a wheel. The position of the mouse on the screen has controlled with a mouse, however, code cannot be entered on your monitor.

Advantages

  • Easy to use
  • Not very expensive
  • Moves the cursor faster than the arrow keys of the keyboard.

Joystick Input Devices

The joystick has also a pointing device used to switch the location of the mouse on a computer display. It has a ball at both the bottom and the top ends. It is a ball. The lower ball in a socket is moving. In four ways the joystick has placed.

The joystick function is close to the mouse function. It has mostly used in CAD and video games. It has used by CAD.

Light Pen

Light pen is a quill pointing device. It has used to select a menu item or to draw icons on the screen of the computer. It has made up of a load cell and a small tube optical structure.

The screen sensing feature senses a display position and sends a signal to the CPU when the light pen tip has pushed over the monitor display screen and pressing.

Track Ball

The trackball is an input device that has usually used instead of a mouse on a desktop or laptop computer. It has a half-inserted ball and the pointer has shifted by pressing fingers on the ball.

Because the whole unit has not moved, it takes less room for a ball than for a mouse. A track ball comes as a ball, button or square in several multiple types.

Scanner Input Devices

This is a scanner that functions much like a copy machine and is an input computer. It has used when such data have visible on paper and transmitted to the computer’s hard drive for further processing.

The scanner collects images from the original and translates them to a digital form which can be saved on your disc. Before printing, these pictures can be changed.