Computer input device is a device used to enter data - data and give commands to the computer to be used in further processing. Some input devices are :
1. Keyboard
Keyboard input is the most important unit in a data processing by a computer. The keyboard can function enter letters, numbers, special characters as well as the media for the user to perform other commands are required, such as saving files and open files.
Keyboard which we now know to have some kind of port, the serial port, ps2, usb and wireless.
Types of Keyboard :
a. QWERTY
b. DVORAK
c. KLOCKENBERG
2. Mouse
Mouse is one of the input unit. The function of this tool is to transfer pointer or cursor quickly. In addition, orders can be as practical and faster than with a keyboard. Most consist of three-button mouse, generally only two buttons used are the left and right buttons. Currently the mouse is also equipped with a capstan button (scroll), which is located in the middle button layout.
3. Joystick and Games Paddle
It is usually used in computer games. Joy Stick is usually shaped sticks, while the paddle games are usually rectangular or square made of plastic equipped with buttons that will govern the motion of an object in the computer.
4. Touchpad
This input unit can usually be found on laptops and notebooks, using finger touch. Normally this unit can be used as a mouse replacement. In addition to the touchpad is a model of its sister units enter the pointing stick and a trackball.
5. Barcode Reader
Barcode included in the input unit (input device). The function of this tool is to read a code-shaped boxes or thick vertical stripes which are then translated into numbers. These codes are usually attached to food products, beverages, electronic equipment, books and more.
6. Scanner
Scanner is a tool that can be used to copy or copy images or text that is then stored in a computer memory. From next computer memory, stored in the hard disk or floppy disk. The scanner function much like a copy machine, a copy machine difference is the result can be seen on the paper while the scanner results can be displayed on a monitor in advance so that we can make improvements or modifications and can then be stored back in the form of text files or image files.
In addition there is also an image scanner to scan commonly used to detect computer answer sheet. Scanners are used to scan the computer answer sheet is SCAN IR commonly used for LJK (Computer Answer Sheet) on general tests
7. Camera Digital
The development of technology has so advanced that the computer is able to receive input from the camera. The camera is called the Digital camera with better picture quality and better compared to how to copy images using a scanner.
8. Microfon
This input unit serves to record or insert sounds that are stored in computer memory or to listen to the sound.
9. Light Pen
Light electronic pointer pen is used for the modification and the design drawings with the screen (monitor). Light pen has a sensor that can transmit light signals to a computer which then recorded, where screen monitors work by recording the electronic signals every six rows per second.
10. Graphic Pads
Technology Computer Aided Design (CAD) can make the design of the building, home, car engines, and aircraft using the Graphics Pads. Graphics is an input pads input for drawing objects on a monitor. Graphics pads used to have two types. First, using a needle (stylus) which is connected to a pad or with wear pads low voltage, which is present on the bearing surface of the touch-sensitive membrane (membrane touch sensitive surface). Low voltage delivered is then translated into the coordinates of X - Y. Second, using the touch-sensitive pads (touch sensitive pad) without the use of needles. It works by putting on the pads of drawing paper, then write with a pencil.
11. Trackball
Trackball an input tool works almost the same principle with the mouse. The difference is if you want to move the mouse pointer on the screen required a shift in the mouse, while the trackball is done by rolling the ball towards the desired trackball with your fingers.
12. Flashdisk
Flash is a device used to store data with a measure of capacity ternetntu. There are 2GB, 4GB, 8GB, 16GB, 32GB, 64GB, 128GB, 256GB, up to 512GB of storage capacity.
See also (Computer Output Device)
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