2. A mouse is a pointing device that functions by
detecting two-dimensional motion relative to its
supp. Mechanical MOUSE
Mechanical mouse
Bill English, builder of Engelbart's original
mouse, invented the ball mouse in 1972 working
for Xerox pace.
3. The ball mouse has two freely rotating rollers.
They are located 90 degrees apart. One roller
detects the forward–backward motion of the
mouse and other the left–right motion.
The ball is mostly steel, with a precision
spherical rubber surface.The weight of the ball,
given an appropriate working surface.
This new design incorporated a single hard rubber
mouseball and three buttons, and remained a
common design until the mainstream adoption of
the scroll-wheel mouse during the 1990s.
.
4. Each roller is on the same shaft as an encoder wheel that
has slotted edges; the slots interrupt infrared light beams
to generate electrical pulses that represent wheel
movement.
Each wheel's disc, however, has a pair of light beams,
located so that a given beam becomes interrupted, or
again starts to pass light freely, when the other beam of
the pair is about halfway between changes.
5. Optical and Laser mice
Optical mouse uses an LED sensor to detect
tabletop movement and then sends off that
information to the computer.
6. Inside a Mouse
The main goal of any mouse is to translate
the motion of your hand into signals that the
computer can use. Almost all mice today do
the translation using five components:
