2. We will be able to identify
◦ What a peripheral is
◦ Examples of Input and Output Peripherals
◦ How peripherals communicate to the
computer
◦ Components of a workstation
◦ The pros and cons of different types of
printers
◦ Different types of keyboards, monitors,
and mice.
3. Any external device that provides input and
output for the computer. Not part of the
essential computer.
◦ For example, a keyboard and mouse are
input peripherals, while a monitor and
printer are output peripherals. Sometimes
called "I/O devices" because they provide
input and output for the computer.
4. Input- An input device is a peripheral used to
transfer data from the outside world into a
computer system.
In other words, it is any machine that feeds data
into a computer.
Output- An output device is any peripheral that
is connected to a computer and used to transfer
data out of the computer in the form of text,
images, sounds or other media to a display
screen, printer, loudspeaker, or storage device.
7. When a device is connected into a
computer, the computer finds the
hardware/software and recognizes it as
part of the computer. You are then able
to access the device. It then transfers
data into the computer or relays
information out.
(Input / Output)
8. • Desk or Table Top
• Chair ( correct
height, support and
position)
• Easy to View
Lighting
• No Loose Cables
• Controlled
Temperature
Monitor
Keyboard
Mouse
Printer
Speakers
Microphone
Webcam
Headphones
9. Printer Name Pros Cons
Ink Jet- spray tiny dots of
ink on a surface to create
an image
Inexpensive to purchase
and wide acceptance of
paper types
Slow when printing many
documents, easily clogged
nozzles which leads to
wasted ink, and dependent
on specific ink
Laser- use toner drums
that roll through
magnetized pigment and
then transfer the pigment
to a surface
High speed, low noise, high
quality, and user friendly
Not environmentally
friendly, take up a lot of
workstation spaces, more
expensive to purchase, and
expensive to repair
Dot Matrix- (common in
the 1980’s and 90’s) use a
print head to embed
images on a surface, using
an ink ribbon
Cheap and easily
accessible, printing costs
are low, able to make
carbon copies, they
tolerate dirty and hot
conditions, and
maintenance cost is low
The output is not a high
resolution, makes a lot of
noise, and not user friendly
11. LCD (Liquid Crystal Display)
- more expensive than CRT's
- introduce the problem of viewing angles
- display is far superior than the CRT
monitor
- compact
CRT (Cathode Ray Tube)
- bigger and bulkier than an LCD.
- consume more power and prone
to screen flicker
12. Wired- The PS/2 and USB are the two wired
connections that connect the keyboards to
your desktop computers.*
Virtual- The virtual keyboards are not actually
physical keyboards, but they are simulated
using a software. Usually, they are used in the
PDA.
Wireless- The three basic types of wireless
keyboards are bluetooth, infrared, and radio
frequency
13. Mechanical: The ORIGINAL mouse. Houses a hard rubber
ball that rolls as the mouse is moved. Sensors inside
the mouse body detect the movement and translate
it into information that the computer interprets.
Optical: use lasers to track the mouse's movement in
relation to the surface it passes over without the use
of a ball.
Infrared (IR) or radio frequency cordless mouse: With
both these types, the mouse relays a signal to a base
station wired to the computer's mouse port. The
cordless mouse requires power, which comes in the
form of batteries.
Trackball: Essentially used as an upside-down mouse,
users rotate an enlarged ball that is tracked by
sensors.
14. So, we got acquainted with the peripheral devices of a
particular computer.
Will they change in the near future?
Definitely not, they are too customized to the requirements of
modern computers.
