Transcription: On the rims of each encoder are tiny metal contact points. Two pairs of contact bars extend from the housing of the mouse and touch the contact points on each of the encoders as they pass by. Each time a contact bar touches a point, an electrical signal results. The number of signals indicates how many points the contact bars have touched. The more signals, the farther you've moved the mouse. The more frequent the signals, the faster you're moving the mouse. The direction in which the rollers are turning combined with the ratio between the number of signals from the vertical and horizontal rol ...
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