Transcript EXAMPLES OF INPUT DEVICES - iamgel

Rock and roll
to the world!!!
Chapter 1
Computer Hardware
BASIC FUNCTION OF
COMPUTER
INPUT
PROCESS
STORAGE
OUTPUT
COMPONENTS OF A
COMPUTER
+
_____________________
COMPUTER SYSTEM
+
WHAT IS HARDWARE?

Physical devices (aspect) of a
computer

Computer hardware can be
classified into two: CPU (Central
Processing Unit) and Peripherals
COMPUTER PERIPHERALS

Input/output (I/O) devices

Usually electromechanical devices

Online devices vs offline devices
INPUT
DEVICES
INPUT DEVICES

Allow the users to input data and
instructions to the computer
EXAMPLES
Papa!!OF INPUT
DEVICES
Keyboard

1875, Christopher Latham Sholes
(father of typewriter) invented the
first practical typewriter

QWERTY keyboard (enhanced) has
101 keys

Electronic typewriter keyboard
Luh?!?!
EXAMPLES OF INPUT
DEVICES
Keyboard three types of key:
1. Alphanumeric keys
2. Punctuation keys
3. Special keys (alt,
arrow/navigation, backspace, caps
lock, ctrl, delete, enter, esc,
function, insert, prt sc, home,
end, page down, page up)
EXAMPLES OF INPUT
DEVICES
Mouse

1963, Douglas Engelbert invented
the mouse at Stanford Research
Institute.

Small hand-held ‘point and click’
device.
EXAMPLES OF INPUT
DEVICES
Three types of mouse:
1.
Mechanical Mouse
2.
Optomechanical Mouse
3.
Optical Mouse
EXAMPLES OF INPUT
DEVICES
Rock
and roll
to the world!!!
Common terms used with mouse
directions/actions:
1. Point (hover over)
2. Click
3. Double Click
4. Drag
5. Select
6. Rollover
EXAMPLES OF INPUT
DEVICES
Light pen

Consist of stylus connected by a
cable to the computer
EXAMPLES OF INPUT
DEVICES
Trackball

Originally built into keyboard

Use hand over the trackball to move
the cursor on the screen
EXAMPLES OF INPUT
DEVICES
Joystick

Small vertical stick attached to
trackball for easier mechanical
movements
EXAMPLES OF INPUT
DEVICES
Scanner

Convert hardcopy to softcopy

Direct-entry input device
EXAMPLES OF INPUT
DEVICES
Barcode Scanner

Uses optical scanner to read
barcode and converts it into
electrical pulses (or simply
characters)
EXAMPLES OF INPUT
DEVICES
Voice Recognition Systems
 Special microphone used to capture
voice as an input
 Converts voice into electrical pulses
to digital signals then transmission
to a computer
 Limited vocabulary of words (voice
command)
EXAMPLES OF INPUT
DEVICES
Digital cameras

Used to capture images (digitally)
OUTPUT
DEVICES
OUTPUT DEVICES

Display the result of the computer.
EXAMPLES OF OUTPUT
DEVICES
Visual display unit or Monitor

Television-like screens that provide
the user interface in the form of
displaying text, numbers and
images

Can be monochrome or colored
EXAMPLES OF OUTPUT
DEVICES
Audio response system or Speaker

Can produce verbal output (sound)
EXAMPLES OF OUTPUT
DEVICES
Printers
 Produce hardcopy output.
Three broad groups of printers
 Character printer, line printers,
page printers
Classification of printers
 Impact printers or non-impact
printers
EXAMPLES OF OUTPUT
DEVICES
CHARACTER PRINTER
Dot Matrix Printers (DMP)
 Prints one character at a time
 Produce dotted-output because of the
pins on the print head
 Speed is measured by CpS (Character
per second) 50-600cps
 Produces a lot of noise
 Uses ribbon as an ink
EXAMPLES OF OUTPUT
DEVICES
CHARACTER PRINTER
Inkjet Printer

Non-impact printer

Quiet when working

Gives better quality

Available in black/white and in
color
EXAMPLES OF OUTPUT
DEVICES
CHARACTER PRINTER
Graphic Plotter

Used for large format media.

Graphs, maps, billboards, tarpaulin
EXAMPLES OF OUTPUT
DEVICES
LINE PRINTER
Drum printer

Uses powder as an ink

Available color: Grayscale
EXAMPLES OF OUTPUT
DEVICES
PAGE PRINTER
Laser printer

High-end printer

More expensive than inkjet printers

Available color: Grayscale
EXAMPLES OF OUTPUT
DEVICES
PAGE PRINTER
Magnetic Printer

Drum coated with magnetic
material that capture the image of
the page to be printed

Use thermal papers
STORAGE
DEVICES
PRIMARY MEMORY (MAIN
MEMORY)
TYPES OF MEMORY
RAM (Random Access Memory)
 Volatile loses its contents if the
device is electrically disconnected
 Temporary holding area for data,
application program instructions
and operating system (OS)
 AKA “waiting room”
APPS
RAM
rapsa!
ajejeje
RAM
WHERE IS
RAM?
PRIMARY MEMORY (MAIN
MEMORY)
TYPES OF MEMORY
ROM (Read Only Memory)
 Non volatile
 Used to store programs that are
essentials for proper operations of
computer system
 Equipped with ROM chips often
called as “firmware”
WHAT
THE…!!!
ROM
SECONDARY MEMORY
(STORAGE DEVICE)
Supplementary to primary storage
 Also called as auxiliary storage
 High storage capacity
 Cheaper than primary memory
 Slower in primary memory in terms
of access time
 Can be serial access or direct access
device

EXAMPLE OF SECONDARY
MEMORY (STORAGE DEVICE)
Magnetic disk

Direct access

Made of rigid materials or
symmetric plastic material

Hard disk and floppy disk
EXAMPLE OF SECONDARY
MEMORY (STORAGE DEVICE)
Magnetic tape

Serial access storage medium

Reels up to 3600 feet made of mylar
plastic tape

Can store large volume of data at
low cost
EXAMPLE OF SECONDARY
MEMORY (STORAGE DEVICE)
Optical Storage

Information is written to or write
from an optical disk or tape using
laser beam

Also known as “laser disk”

CD-ROM, CD-R, CD-RW, DVD-ROM,
DVD-RW, DVD-R, Blu-ray
EXAMPLE OF SECONDARY
MEMORY (STORAGE DEVICE)
Solid state storage

Sometimes called flash memory

Erasable, re-writable

Flash drive (pen drive) and Memory
card (SD/MMC)
PROCESSING
UNIT (PU)
EXAMPLE OF PROCESSING
UNIT
CPU (Central Processing Unit)

Also known as Processor

Brain of the computer

Containing ALU (arithmetic logic
unit) and control unit

Without the help of Chips (Chipset)
the CPU is useless
EXAMPLE OF PROCESSING
UNIT
GPU (Graphics Processing Unit)
 Used to managed and boost the
performance of video and graphics
 Its features are designed to lessen the
work of CPU
 Mobile phones, display adapters,
workstation and game console
 Developed by Nvidia in 1999 (GeForce
256)
INTERNAL
COMPONENT
EXAMPLE OF INTERNAL
COMPONENT
Motherboard

Main circuit board of a computer

Mainboard, system board, MOBO
INSIDE MOTHERBOARD
CMOS (Complementary Metal-Oxide
Semiconductor)

On-board battery powered
semiconductor chip

Prevent up-to-date your computer

Uses CMOS coin cell battery to
power the CMOS memory
INSIDE MOTHERBOARD
Expansion slots

Used to insert expansion card
(circuit board) which provide
additional features to a computer
such as video, audio, Ethernet
INSIDE MOTHERBOARD
AGP (Accelerated Graphics Port)

Based on PCI design for 3D

Developed by Intel
INSIDE MOTHERBOARD
Memory Slots

Memory Slot, Memory socket, RAM
slot

Can be 2 or 4 memory slots depends
on a motherboard
INSIDE MOTHERBOARD
Cooling Fan

Used for active cooling
INSIDE MOTHERBOARD
Power Supply

Power Supply Unit (PSU)

Component that supplies a power to
a computer
INSIDE MOTHERBOARD
Rock and roll
to the world!!!
Ports
Tenk
yu
berimats
 Physical docking point of an
external device