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Computer peripherals and their functions
Nicole Raghuon 3 March 2013
Transcript of Computer peripherals and their functions
Input devices are the type of the computer devices that are used to provide the control signals to the computer. Keyboard and the Mouse are the examples of the input devices.
Output devices are the devices that are used to display the results. Printer, scanner, speaker and the monitor are the examples of the output devices. Peripheral devices are computer devices that are connected to the computer externally such as printer, scanner, keyboard, mouse, speakers, web-cam and external modem. They can be internal such as CD-ROM or internal modem
All of these devices hook up electronically via cables or wireless connection to the main computer, but are separate from the main operating functions of the computer. Without peripherals, your communication with your computer would be far more limited.
Peripheral devices can be classified according to their functions. Computer Peripherals
•One of the main input devices used on a computer, a PC's keyboard looks very similar to the keyboards of electric typewriters, with some additional keys. Below is a graphic of the Saitek Gamers' keyboard with indicators pointing to each of the major portions of the keyboard. The mouse allows an individual to control a pointer in a graphical user interface (GUI). Utilizing a mouse a user has the ability to perform various functions such as opening a program or file and does not require the user to memorize commands. Today, a pointing device is found on virtually every computer. Mouse •Printers provide the means for the computer to output information in portable form. Whether a document, a photograph or even an image on canvas (for more sophisticated devices) a printer allows us to reproduce information and share it with others. Printer Scanners are input devices that give the means to insert information into a computer. They can be used for visual information such as photographs or drawing, or teamed with type-reading software to import documents and translate the hard copy to text that can be edited in word processing programs. Some scanners are sensitive enough to produce a images that are many millions of megabytes in size from an image as small as a slide.Other scanners include: sheetfed scanner, which is a scanner that scans paper fed into it, handheld scanner, which is a scanner that is held and drag over a page to scan it, and a card scanner, which is a small scanner capable of scanning business cards. Scaners An output device that can take the display of a computer screen and project a large version of it onto a flat surface. Projectors are often used in meetings and presentations so that everyone in the room can view the presentation. Projectors used with computers are small devices that are rarely much larger than a toaster and typically weigh a few pounds. Projectors Keyboard A camera connected to a computer that allows anyone connected to the Internet to view either a still pictures or motion video of a user or other object. Today, most webcams are either embedded into the display with laptop computers or connected to the USB on the computer Webcam A motherboard is the central printed circuit board (PCB) in many modern computers and holds many of the crucial components of the system, providing connectors for other peripherals. The motherboard is sometimes alternatively known as the mainboard, system board, or, on Apple computers, the logic board. It is also sometimes casually shortened to mobo. Motherboard Short for Compact Disc-Read Only Memory, CD-ROM drives or optical drives are CD players inside computers that can have speeds in the range from 1x and beyond, and have the capability of playing audio CDs and computer data CDs. CD-Rom Drive CD-Rom Drive USB Universal Serial Bus (USB) is an industry standard developed in the mid-1990s that defines the cables, connectors and communications protocols used in a bus for connection, communication and power supply between computers and electronic devices.The USB was designed to standardize the connection of computer peripherals, such as keyboards, pointing devices, digital cameras, printers, portable media players, disk drives and network adapters to personal computers, both to communicate and to supply electric power. USB The End By Nicole Raghu 5A