What is Mouse ? | Invention | Activities | Types | How mouse works ? | Mouse ports | How has the design being changed ?

1. Presentation on
Computer Mouse
Peripheral & Interfacing
Sub Code : CSE-432
Bangladesh University

2. Submitted by :
Md. Sadiqur Rahman
Id : 201531043092
Batch : 43 (Day)
Dept : CSE
Bangladesh University
Submitted to :
Khan Md. Hasib
Lecturer,
Department of Computer Science and Engineering,
Bangladesh University

3. Computer Mouse
Key Points
• What is Mouse
• Invention of Mouse
• Activities of Mouse
• Types of Mice / Mouses
• How Mouse Works
• Computer Mouse Ports
• How has the Design being changed

4. What is Mouse ?
• A computer mouse is a hand-held pointing device that detects two-
dimentional motion relative to a surface.
• This motion is typically translated into the motion of a pointer on
a display, which allows a smooth control of the graphical user interface.
Why it is named as “Mouse” ?
• With the cord coming out of the back of the mouse Douglas said the
device reminded him of the rodent mouse and the name stuck.
• It's a lot easier to remember than a ”X-Y Position Indicator for a Display
System”.

5. Invention of Mouse
• In 1968, a man named
Douglas Engelbart created this
special tool to help people
control their computers.
• It was a small wooden block on
wheels, and there was a long
cable sticking out of the back,
kind of like a tail!

6. Activities of Mouse
• Move the mouse cursor
• Open or execute a program
• Select
• Drag-and-drop
• Hover
• Scroll
• Perform other functions

7. Types of Mice / Mouses
• Cordless (Wireless)
• Footmouse
• IntelliMouse (Wheel mouse)
• J-Tech Mouse
• Joystick
• Optical Mouse
• Gest
• gStick Mouse
• Touchpad (Glidepoint)
• Mechanical
• Trackball
• TrackPoint

8. How Mouse Works (Mechanical Mouse)
• When the mouse moved, this
movement rolls a ball found inside.
• The mouse should place on flat table
or mouse pad in order to move.
• The two axles (represent the X and Y
direction) will turn as a result of the
rolling ball.
• Each axle connects to wheel
(resembles like a gear) which spins
when the axle rotates.

9. • Beside each rotating wheel, there are an infrared LED (light-
emitting diode) and infrared Sensor.
• The LED sends a path of light to the wheel.
• The sensor, found on the other side of the wheel, detects the
pulses of light interrupted by rotating wheel.
• The mouse on-board processor chip reads the pulses from the
sensor and translates into computer usable format (binary
data).
• This tells the mouse position and speed which is displayed in
the movement of a cursor on a screen.
How Mouse Works (Mechanical Mouse)

10. How Mouse Works (Optical Mouse)
• Today, ball mouse is replaced by optical types
which use LED and a small camera to sense
the movement of a mouse.
• Optical mouse actually uses a tiny camera to
take 2000 pictures every second.
• The mouse has a small, red light-emitting
diode (LED) that bounces light off that surface
onto a complementary metal-oxide
semiconductor (CMOS) sensor.
• The CMOS sensor sends each image to a digital
signal processor (DSP) for analysis.

11. How Mouse Works (Optical Mouse)
• The DSP, operating at 18 MIPS (million instructions per second), is able to detect patterns in the
images and see how those patterns have moved since the previous image.
• the DSP determines how far the mouse has moved and sends the corresponding coordinates to
the computer.
• The computer moves the cursor on the screen based on the coordinates received from the mouse.
• This happens hundreds of times each second, making the cursor appear to move very smoothly.

12. Most modern Mouse has the following parts
• Case
• On-board processor chip
• Two buttons
• A wheel between the two buttons (used to
scroll up and down, Zoom IN and Zoom
Out in applications like AutoCAD)
• Battery (if it is wireless)
• Connection interface such as USB or
Infrared

13. Computer mouse ports
• Bluetooth
• PS/2 Port
• Serial Port
• USB
• Infrared
Today, most computer mice connect to a
computer using a USB port. Below is a listing
of all the type of ports and wireless
connections that a mouse is capable of using
or has used in the past.

14. How has the Design
being changed
• The computer mouse has
definitely changed size, getting
smaller and smaller.
• The design has also become
more comfortable to hold, as the
first computer mouse was quite
square.
• Motion detectors have changed
from a tracking ball, to an LED
light, and now a laser.

15. How has the Design
being changed
• This improves the quality of
motion we see on the screen,
and also eliminated the use of
the mouse pads.
• A ‘scroll wheel’ is also
available on most mouses,
making it easier to view web
pages and folders.

16. How Mouse Works (Mechanical Mouse)

17. How Mouse Works (Optical Mouse)

18. Thank You . . .