Input devices allow users to enter data and instructions into a computer. Major input devices include keyboards, mice, microphones, cameras, joysticks, and motion trackers. A keyboard uses buttons to enter text, a mouse detects motion to control a pointer, a microphone converts sound to electrical signals, a camera records still or moving images, a joystick reports its angle to control games or other devices, and motion trackers detect body movement as input.

1. Input
devices

2. CONTENT
Introduction
Input
devices
Major Input
devices
conclusion
Done by
Rajesh
Explanation

3. Introduction
Computer cannot understand our language because it
understands only machine language and it can be
possible using some devices, are called input devices.
When we work with computer we need to enter data
and instructions to the computer using these devices.
These devices convert data and instructions to a form
that can be recognized by the computer.

4. Input devices
An input device for a computer allows you to enter information.
The most fundamental pieces of information are keystrokes on a
keyboard and clicks with a mouse. These two input devices are
essential for you to interact with your computer. Many other input
devices exist for entering other types of information, such as
images, audio and video. Input devices represent one type of
computer secondary - the other two types are output devices and
storage devices.
Examples of input devices include keyboards, mouse, scanners, digital
cameras and joysticks.

5. Major input devices
Some of the major input devices are:
Keyboard
Mouse
microphone
Camera
Joystick
Motion Tracker

6. keyboard
A computer keyboard is a typewriter-style device which uses an
arrangement of buttons or keys to act as a mechanical
lever or electronic switch.
A keyboard typically has characters engraved or printed on the
keys and each press of a key typically corresponds to a single
written symbol.
Despite the development of alternative input devices, such as
the mouse, touch screen, pen devices, character
recognition and voice recognition, the keyboard remains the most
commonly used device for direct (human) input
of alphanumeric data into computers.

7. Mouse
A computer mouse is a pointing device (hand control) that
detects two-dimensional 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.
Physically, a mouse consists of an object held in one's hand,
with one or more buttons.
Mice often also feature other elements, such as touch
surfaces and "wheels", which enable additional control and
dimensional input.

8. Microphone
A microphone, colloquially nicknamed mic is an
audio-to-electric transducer or sensor that
converts sound into an electrical signal.
Electromagnetic transducers facilitate the conversion
of audio signals into electrical signals.
Most microphones today use electromagnetic
induction (dynamic microphones), capacitance change
or piezoelectricity (piezoelectric microphones) to
produce an electrical signal from air pressure
variations.

9. Camera
The images may be individual still photographs or
sequences of images constituting videos or movies.
The functioning of the camera is very similar to
the functioning of the human eye.
A camera is an optical instrument for recording or
capturing images, which may be stored locally,
transmitted to another location, or both.

10. Joystick
 A joystick is an input device consisting of a stick that
pivots on a base and reports its angle or direction to
the device it is controlling.
Joysticks are often used to control video games, and
usually have one or more push-buttons whose state
can also be read by the computer.
A joystick, also known as the control column

11. Motion tracker
Motion tracking is the process of detecting a change
in the position of an object relative to its
surroundings or a change in the surroundings relative
to an object. E.g. Kinect, Sony move, wii.
Based around a webcam-style add-on secondary, it
enables users to control and interact with their
console/computer without the need for a game
controller, through a natural user interface using
gestures and spoken commands.