Transcription: A joystick does the same job as a mouse, but in a different way. Instead of using mechanical rollers as a mouse does, the joystick uses two electrical resistors that measure how much the joystick is moved. The amount of electricity that can flow through the resistors depends on the position of the joystick. Joysticks fire buttons work just like the mouse buttons, except they're usually more fun. If you need to get a graphic image into your PC, you can use a scanner. When you click the scan button, a light emitting diode or LED shines on the image you want to scan. This light is then reflected ...
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