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Input & output devices
Transcript of Input & output devices
An input device that looks like an upside-down mouse. The onscreen pointer is moved by the trackball with a thumb or finger.
Digital camera encodes digital images and videos digitally and stores them for later reproduction.
Microphone is a transducer that converts sound into an electrical signal.
Manual input devices
Data is input in to the computer by hands.
(People have to do most of the work)
The example of Manual devices are, keyboard and a mouse. Keyboard and mouse are the most common input devices.
A concept keyboard is a flat board that contains a grid of buttons. Each button can be programmed to do whatever we want.
Joystick allows the user to control a character or machine in a computer program. For example like a plane in a flight simulator.
A touch screen is a computer display screen that is also an input device. The screens are sensitive to pressure; a user interacts with the computer by touching pictures or words on the screen.
Input device means anything used to send data to a computer.
For example, like camera, sensor, microphone, keyboard, etc ...
+Digital cameras sometimes called as digicam.
Alternatively referred to as a video digitiser, a video digitizer is software that takes an analog video still frame and coverts it to a digital still image. This is accomplished with the aid of computer hardware.
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A scanner is a device that captures images from photographic sources for computer editing and display.
Automatic input devices
1. sensor - they collects data and linked to a control program.
2. Barcode reader - an electronic device that can read,output printed barcodes to a computer.
3.Magnetic strip (or stripe) reader - a hardware device that reads the information encoded in the magnetic stripe.
4.Magnetic Ink Character Reader (MICR)- is a technology used to verify the legitimacy or originality of paper documents.
5.Optical Mark Reader (OMR) - a method of entering data into a computer system.
Central processing unit
The CPU (Central Processing Unit) is the part of a computer system that is commonly referred to as the "brains" of a computer.
They let the computer communicate with the user. Examples of devices that take advantage of these formats are; monitors, plotters, and other output devices!
Controls the tv (turn on or turn off)
Edit the texts on the search screen
Change the channels form the tv
Common output formats are printed paper, sound, video and on-screen documents. They let the computer communicate with the user.
Examples of output devices
Home output devices