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/ MacWorld: Complete Mac Interactive / Macworld Complete Mac Interactive CD)(1994).iso / Handbook Interactive / How Mouse Works Movie (.mp4) < prev    next >
Apple QuickTime movie  |  1994-06-25  |  5.1 MB  |  320x240  |  15fps  |  39 seconds  |  [MooV/TVOD]
Transcription: In 1964, researcher Douglas Engelbart invented a device he called the XY positioning indicator for a display system. Today it's called a mouse and it's the cornerstone of the Mac's graphical interface. In an Apple mouse, a rubber ball makes contact with two rollers. The rollers are connected to slotted wheels, each of which is sandwiched between an infrared light source and a light sensor. When the mouse moves, the rubber ball causes the rollers and their wheels to turn, The infrared light flickers through the slots in the wheels, generating electrical current in the sensors. By measuring this ...