List Of Various Input And Output Devices

In this input and output devices tutorial, I would like to explain about various input and output devices. In this computer you can see detailed description of some input and output devices like Keyboard, Mouse, Scanner, Printer, Track Ball, Light Pen Barcode Readers and Plotters etc.

Keyboard: Keyboard is used in the input phase of a computer-based information system. Keyboard is most common input device is used today. The data and instructions are input by typing on the keyboard. The message typed on the keyboard reaches the memory unit of a computer. It’s connected to a computer via a cable. Apart from alphabet and numeral keys, it has other function keys for performing different functions.



Input Devices

Mouse: It’s a pointing device. The mouse is rolled over the mouse pad, which in turn controls the movement of the cursor in the screen. We can click, double click or drag the mouse. Most of the mouse’s have a ball beneath them, which rotates when the mouse in moved. The ball has 2 wheels of the sides, which in turn mousse with the movement of the ball. The sensor notifies the speed of its movements to the computer, which in turn moves the cursor/pointer on the screen.

Scanner: Scanners are used to enter information directly in to the computers memory. This device works like a Xerox machine. The scanner converts any type of printed or written information including photographs into digital pulses, which can be manipulated by the computer.

Track Ball: Track ball is similar to the upside- down design of the mouse. The user moves the ball directly, while the device itself remains stationary. The user spins the ball in various directions to effect the screen movements.

Light Pen: This is an input device which is used to draw lines or figures on a computer screen. It’s touched to the CRT screen where it can detect raster on the screen as it passes.

Optical Character Rader: It’s a device which detects alpha numeric characters printed or written on a paper. The text which is to be scanned is illuminated by a low frequency light source. The light is absorbed by the dark areas but reflected from the bright areas. The reflected light is received by the photocells.

Bar Code Reader: This device reads bar codes and coverts them into electric pulses to be processed by a computer. A bar code is nothing but data coded in form of light and dark bars.

Voice Input Systems: This devices converts spoken words to M/C language form. A micro phone is used to convert human speech into electric signals. The signal pattern is then transmitted to a computer when it’s compared to a dictionary of patterns that have been previously placed in a storage unit of computer. When a close match is found, the word is recognized.

Plotter: Plotter is an O/P device that is used to produce graphical O/P on papers. It uses single color or multi color pens to draw pictures as blue print etc.

Digital Camera: It converts graphics directly into digital form. It looks like an ordinary camera, but no film is used therein, instead a CCD (changed coupled Divide) Electronic chip in used. When light falls, on the chip though the lens, it converts light waves into electrical waves.

Output Devices

I hope you love the above tutorial about input and output device. Need your comments if you have any suggestions.

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What Is Input And Output Devices Of Computer?

In this computer article, I will describe about input and output devices of computer. Here, you can also learn about various input and output devices like Keyboard, Mouse, Printer, Scanner, Joystick etc.

So, the terms are: Input And Output Devices

As you know that, A computer is built from various components like Keyboard, Mouse, CPU, Monitor etc. Without all these components operating a computer is not easy as all these components are used to give instructions to computer or used to display the results.

Input Devices

In computing, Input means giving some instructions so we can say that, Input Devices are those devices which we can use to give instructions to computer. Now you can say what are the names of these input devices? These input devices are Keyboard, Mouse, Scanner, Joysticks, Light-pen and Microphone etc.

Images Of Input Devices

Output Devices

In computing, Output means showing the results of instructions what has given to computer by input devices. So we can say that Output Devices are those devices which is used by a computer to show the results what had instructed to computer. Some of the names of output devices of computer are Monitor, Printer, Speaker etc.

Images Of Output Computer

In simple terms, We can say that devices that we used to give instructions to computer called Input Devices and devices that are used by a computer to display results are called Output Devices.

Here, I am going to explain some the Input and Output Devices of Computer in explain.

Input Devices

Keyboard: Keyboard is an input devices which is used to give instructions to computer. Its looks similar to traditional typewriter. By using keyboard you can type anything in computer.

Mouse: A mouse is also an input device of computer. By using mouse you can click and give instructions to computer.

Scanner: A scanner is an input device which is used to scan any picture or document in computer.

Joysticks: A joystick is an input devices which is used in computer gaming.

Lightpen: A light pen is also an input device which is used to give instructions to computer. By using light pen you can directly write something to monitor.

Output Devices

Monitor: A monitor is an output device which is used to display results. Its looks similar to a TV.

Printer: A printer is also an output devices which is used to print documents and images.

Speaker: A speaker is also an output device which is used to listen sound from computer.

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