Subject: Information Technology
Topic: Input Devices
At the end of the lesson students should be able to:
Develop and understanding of input devices.
Students should be able to;
Correctly define the term input devices without the aid of a teacher
Correctly identify at least three (3) input devices from each category without the
help of the teacher.
Properly distinguish between at least five (5) input devices without the aid of the
What is an Input Devices?
Any hardware component that allows you to enter data, programs, commands, and user
responses into a computer
Input devices can be classified in two (2) categories:
Manual input devices are those devices that require one to physically operate them in
some manner in order to input data.
Automated input device are methods of capturing and entering data directly to the
computer without the intervention of the user
MANUAL INPUT DEVICES
The mouse is an input device designed to manipulate objects on the computer
TYPES OF MOUSE
A Mechanical mouse has a rubber ball on its underside to detect
movement of the mouse.
An optical mouse uses devices that emit and sense light to detect the
A cordless mouse transmits data using wireless technology such as
radio waves or infrared light waves
A trackball is a pointing device consisting of a ball housed in
aarrival of the touchpad, on portable computers, where there may be no
desk space on which to use a mouse. Some clip onto the side of the keyboard and have
integral buttons which have the same function as mouse buttons.
A keyboard contains keys that allow a user to enter data and
instructions into the computer.
A scanner is a light-sensing input device that converts printed text &
graphics into a digital form that can be processed by the computer.
TYPES OF SCANNER:
AUTOMATED INPUT DEVICES
barcode reader is a computer peripheral for reading
barcodes printed on various surfaces.
Magnetic Ink Character Reader (MICR)
This enables special characters printed in magnetic ink to be read
and input rapidly to a computer
The is a device that "reads" pencil marks on compatible scan
forms such as surveys or test answer forms.
Optical Character Recognition
This is computer software designed to translate images of handwritten
or typewritten text into machine-editable text, or to translate pictures of
characters into a standard encoding scheme representing them