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Detail of Input and output devices (1).ppt
- 1. Input / OutputDevices Input / Output Devices
- 2. Input Devices Input Devices An input device is any hardware component An input device is any hardware component that allows you to enter data and instructions that allows you to enter data and instructions onto a computer. Six Widely used input onto a computer. Six Widely used input devices are the keyboard, mouse, devices are the keyboard, mouse, microphone, scanner, digital camera and PC microphone, scanner, digital camera and PC video camera. video camera.
- 3. Output Devices Output Devices An output device is any hardware component An output device is any hardware component that conveys information to one or more that conveys information to one or more people. Three commonly used output devices people. Three commonly used output devices are a printer, a monitor and speakers. are a printer, a monitor and speakers.
- 4. Keyboards & Mouse Keyboards& Mouse Keyboard Keyboard ItA keyboard is one of the primary input devices used with a computer. Similar to an electric typewriter, a keyboard is composed of buttons used to create letters, numbers, and symbols and perform additional functions. Mouse Mouse A computer mouse is a handheld hardware input device that controls a cursor in a GUI (graphical user interface) and can move and select text, icons, files, and folders on your computer.
- 5. Scanners Scanners A scanner isan input device that scans documents such as photographs and pages of text. When a document is scanned, it is converted into a digital format. This creates an electronic version of the document that can be viewed and edited on a computer.
- 6. Microphones Microphones A microphone,called a mic or mike is a device – a transducer – that converts sound into an electrical signal. Microphones are used in many applications such as telephones, hearing aids, public address systems for concert halls and public events, motion picture production, live and recorded audio engineering, sound recording, two-way radios, megaphones, radio a nd television broadcasting.
- 7. Monitors Monitors A computermonitor is an output device that displays information in pictorial form. A monitor usually comprises the visual display, circuitry, casing, and power supply. Originally, computer monitors were used for data processing while television sets were used for entertainment. From the 1980s onwards, computers (and their monitors) have been used for both data processing and entertainment, while televisions have implemented some computer functionality.
- 8. Printers Printers A printeris an output device that prints paper documents. This includes text documents, images, or a combination of both. The two most common types of printers are inkjet and laser printers. Inkjet printers are commonly used by consumers, while laser printers are a typical choice for businesses. Dot matrix printers, which have become increasingly rare, are still used for basic text printing.
- 9. Speakers Speakers Speakers are oneof the most common output devices used with computer systems. Some speakers are designed to work specifically with computers, while others can be hooked up to any type of sound system. Regardless of their design, the purpose of speakers is to produce audio output that can be heard by the listener.
- 10. Slide Projectors Slide Projectors A slide projector is a device that is used to view photographic slides by using optical and mechanical methods. It contains an electric light bulb. focusing lenses. reflector and condensing lenses. a holder that holds the slide. A flat piece of heat absorbing glass is often placed between the condensing lens and the slide, to avoid damaging the slide. This glass absorbs infrared. Light passes through the transparent slide and lens, and the resulting image is enlarged and projected onto a screen. So the audience can view its reflection.