Study of Peripherals of computer System.pdf

Study of Peripherals of computer System.pdf

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  18CSE338J – ComputerGraphics Unit – 1 : Session –3,4 : SLO -1,2 Study of Peripherals of Computer 1
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  • Theory: • Acomputer peripheral, is any device that connects to the computing unit but is not part of the core architecture of the computing unit. The core computing unit consists of the central processing unit (CPU), motherboard, and power supply. The case that surrounds these elements are also considered part of the core computing unit. Anything that is connected to these elements is considered a peripheral. • List of some computer peripherals. • Mouse • Keyboard • Monitor • RAM • DVD-ROM • Microphone • Webcam • Printer 2
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  • Mouse • Acomputer mouse is an input device that is most often used with a personal computer. Moving a mouse along a flat surface can move the on-screen cursor to different items on the screen. Items can be moved or selected by pressing the mouse buttons (called clicking). MOUSE stands for Manually Operated User Selection Equipment. • It is the equipment attached to a computer system and works as a cursor in a computer or laptop. There are many types of mouse: Optical mouse, wireless mouse, mechanical mouse, trackball mouse. • Functions of Mouse • To open a file or program. Place the mouse pointer over the file or program you wish to launch and double-click on the left mouse button quickly. • To select and highlight an object or text. • To drag-and-drop. • To copy and paste. 3
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  • Keyword • Acomputer keyboard is an input device used to enter characters and functions into the computer system by pressing buttons, or keys. It is the primary device used to enter text. A keyboard typically contains keys for individual letters, numbers and special characters, as well as keys for specific functions. Modern keyboards matching US conventions typically have 104 keys while the 105 key layouts is the norm in the rest of the world. • The keys on the keyboard can be divided into several groups based on function: • Typing (alphanumeric) keys. These keys include the same letter, number, punctuation, and symbol keys found on a traditional typewriter. • Control keys, Function keys, Navigation keys, Numeric keypad. • Types of Computer Keyboards: • Wired Keyboards, Numeric Keypads, Ergonomic Keyboards, Wireless Keyboards. • USB Keyboards, Bluetooth Keyboards, Magic Keyboards, QWERTY Keyboards. 4
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  • Monitor • Computermonitor is an output device that displays information in pictorial or textual form. A discrete monitor comprises a visual display, support electronics; power supply, housing, electrical connectors, and external user controls. A monitor works as an output device by displaying visual information on its screen. It receives signals from the computer's graphics card or integrated graphics, interprets the data, and then shows the image or video on the screen, allowing you to see the output of your computer. • Uses of monitor • Monitor is used for Gaming. • Monitor is used by Business users for using various business centric software applications such as MS Excel. • Computer Monitor is used to display the result of any data and for data entry also. • It is used for web browsing. • Nowadays it is used for entertainment. 5
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  • Types ofmonitor: • LCD monitors. LCD stands for Liquid crystal display and is the most widely used monitor in the world. • LED monitor. An LED (Light Emitting Diode) display is among the newest techs out there and can be flat or curved. • OLED monitor, CRT monitor, Plasma monitor. • RAM (Random Access Memory) • RAM is a common computing acronym that stands for random-access memory. Sometimes it's called PC memory or just memory. In essence, RAM is your computer or laptop's short-term memory. Generally, 8GB of RAM for casual computer usage and internet browsing is recommended, 16GB for spreadsheets and other office programs, and at least 32GB for gamers and multimedia creators. It's where the data is stored that your computer processor needs to run your applications and open your files. • Different types of RAM: • Static RAM (SRAM) • Dynamic RAM (DRAM) • Synchronous Dynamic RAM (SDRAM). 6
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  • ROM (ReadOnly Memory) • ROM (read-only memory) is a non-volatile memory type. This means it receives data and permanently writes it on a chip and it lasts even after you turn off your computer. The data is coded to not be overwritten, so it's used for things like your printer software or your startup programs. • Types of Read Only Memory • MROM (masked read only memory) • PROM (programmable read only memory) • EPROM(erasable and programmable read only memory) • EEPROM(electrically erasable and programmable read only memory)
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  Output Devices • OutputDevices • It is an electromechanical device, which accepts data from a computer and translates them into form understand by users. • Following are Output Devices: • Printers • Plotters • Printers: • Printer is the most important output device, which is used to print data on paper. •
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  • 1. ImpactPrinters: The printers that print the characters by striking against the ribbon and onto the papers are known as Impact Printers. • These Printers are of two types: • Character Printers • Line Printers • 2. Non-Impact Printers: The printers that print the characters without striking against the ribbon and onto the papers are called Non-Impact Printers. These printers print a complete page at a time, therefore, also known as Page Printers. • Page Printers are of two types: • Laser Printers • Inkjet Printers • Dot Matrix Printers: • Dot matrix has printed in the form of dots. A printer has a head which contains nine pins. The nine pins are arranged one below other. Each pin can be activated independently. All or only the same needles are activated at a time. When needless is not activated, and then the tip of needle stay in the head. When pin work, it comes out of the print head. In nine pin printer, pins are arranged in 5 * 7 matrixes.