Input, Output and Storage Devices

Input, Output and Storage Devices

1. Input Devices

   • Computer keyboard
     • Each key on the board has a little electrical switch under it, if you pressed a key. it would send that information on to your computer
   • Webcam
     • It captures light through a small lens at the front using a tiny grid of microscopic light detectors built into an image-sensing microchip.
   • Microphone
     • Microphones convert sound waves into electrical energy.
   • Computer mouse
     • It is an alternate for the mechanical mouse, which uses moving parts to sense motion.
   • Tablet screen
     • Resisitive systems dectect a touch on a screen through pressure.
   • Chip and pin device
     • When you put your credit card into device it is known as an input, it takes money (data) from that account when pin number is entered.
   • Joystick
     • A joystick works by the movement of your hand, it allows you to turn and pivot and do what ever you want.
   • Scanner
     • The light passes through the scanner lens and reaches the CCD sensors.
   • Camera
     • A camera is basically a box of light and when you wan to take a photo a certain amount of light is let out at that time.
   • Memory stick
     • When you input the stick into the computer, data flows with it.

2. Output Devices

   • Speaker
     • Noise flows throughs coils and as they move they pump soundwaves into the air.
   • Printer
     • It makes laser beam scan back and forth across a drum inside the printer, building up a pattern of static electricity. The static electricity attracts onto the page a kind of powdered ink called toner.
   • Headphones
     • Everything inside them (the magnet, the coil of wire and the diaphragm cone that makes the soud0 is shrunk down the a much smaller form to creat headphones.
   • TV
     • A TV produces a series of tiny dots on a screen (called pixels) that then appears as a whole image.
   • instant camera
     • It is basically a camera and printer in one, once the photo has been taken it prints autmatically with the camera and printing aspects in it.
   • Projector
     • In an LCD TV projector, a very bright light shines through a small LCD screen into a lens, which throws a hugely magnified image of the screen onto the wall.
   • Receipt Printer
     • For every item that has been purchased a recieipt should be printed , the printer consists of a roll of paper that sits inside the device and ink prints out onto the page when a receipt is needed.
   • Monitor
     • Monitors include "cathode ray tube (CRT), the "liquid crystal display (LCD), and "thin film transistor (TFT) displays.
   • Screen
     • The picture is made from millions of tiny pictures that make out words or images on a screen.
   • Film Recorder
     • A film recorder is a graphical output device for transferring digital images to photographic film. All film recorders typically work in the same manner. The image is fed from a host computer as a raster stream over a digital interface.

3. Storage Devices

   • Memory stick
     • Electronic memory comes in a variety of forms to serve a variety of purposes. Flash memory is used for easy and fast information storage in computers, digital cameras and home video game consoles.
   • CD
     • In a CD information is stored digitally, for example music could be stored on there.
   • DVD
     • A DVD iworks exactly the same as a Cd stores information digitally but instead of music a movie could be stored on there and when you put it in a DVD player you have your movie.
   • Camera
     • A camera basically consists of a lightproof box that lets in a bit of light at just the right moment. Once the light enters the camera, it creates an image by causing a chemical reaction on photo film.
   • Phone
     • A basic phone is more than a combined radio transmitter and radio reciever, overall it is quite similar to a walkie-talkie but a bit more complex.

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