Peripherals

Peripherals

1. Input

   • Webcam
     • Works as a camera to take the image of somthing and either take a video/picture or sometimes to talk live to someone else, the usaly connect with a USB or if they have a mic the USB and Input Audio Jack.
   • Microphone
     • A microphone records a sound and works by converting acoustical energy, sound waves, to electrical energy/the audio signal ; this is done by a diaphragm which vibrates and is converted to the signal.
   • Mouse
     • A Mouse connects to the computer , often VIA USB - whether wireless or wired, and allows you to move the cursor. Most mice now use Photodiode and LEDs while some modern and many older mice where mechanical using a ball inside which moves, while it moves two "Rollers" with holes and a light sensor, a LED provides the light and then it is able to sense where it has moved and this corresponds on the computer via the X and Y axis'
   • Keyboard
     • A keyboard connects to the PC, usually via USB, and allows you to type on the PC
   • Joystick
     • A joystick is used to play games EG Flight Games in that case pushing forward would point the planes nose down, left would roll it left. They are usaly connected via USB
   • Controller
     • A controller uses a mix of buttons and what are essentially small joysticks to play games, usually connects via USB.

2. Output

   • Headphones
     • Produces sound, usually plugged in with an Audio Jack
   • Speakers
     • Produces sound, and is usually plugged in via Audio Jacks
   • Printer
     • A printer will print out an image from a PC and can be plugged in ways such as USB or sometimes Bluetooth/Wirelessly
   • Moniter
     • A monitor shows the image of the computer on the screen.
   • Projector
     • Like a monitor, accept it projects the image onto a surface ; often they are plugged in with plugs such as VGA, HDMI or USB

3. Storage

   • CD Rom
     • A CD Rom uses a CD to store or transfer information
   • Floppy disk drive
     • A Floppy Disk Drive uses a floppy disk to store/transfer information to it
   • Flash Drive
     • Stores information and tranfers it with a USB port
   • ROM cartridge
     • With a cartridge information is stored on it, although it is normally "Read Only" meaning un-editable
   • SD Card
     • An SD card stores information and can transform it
   • External Hard Drive
     • Works in the same way as a normal hard drive, however it is external connecting via USB
   • Internal hard drive
     • Uses spinning disks to store / retreve information on a computer

4. Input and Output

   • Dongle
     • Connects to the internet, plugged in via a usb
   • Modem
     • Connects to the internet sometimes via wifi but often with an ethernet cable

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