Transcript Document

Motherboard
Inside the case
of the computer
CPU and CPU
Fan
Hard disk
RAM
Solid state disk
Storage
View all components you
need to build you own PC
at e.g.
http://www.butterscotch.c
om/tutorial/GettingStarted-Building-Your-PC
Optical storage
U3 drive
• What is the
motherboard?
• Purpose the
motherboard?
• Where do you find the
motherboard?
• How do you fit the
motherboard?
See a video how to install
motherboard inside the case e.g.
http://www.butterscotch.com/tu
torial/Installing-TheMotherboard-Into-Your-Case
•
•
•
•
What is the role of the CPU?
Where do you fit the CPU?
Who manufactures CPUs for PCs?
Who manufactures CPUs for
smartphones and consumer
tablets?
• What is the unit of measurement
for the speed of a processor?
• What can be done to prevent
damage from overheating?
See a video how
to install CPU and
fan e.g.
http://www.butte
rscotch.com/tutor
ial/Preparing-TheMotherboardAnd-CPU
• What is the role of RAM?
• Whys is the data transfer
between RAM and CPU is fast?
• What is the effect when you
increase RAM?
• How do you upgrade RAM?
• What does RAM is “volatile”
mean?
• What limits the amount of RAM
you can use?
Watch a video how to
install memory e.g.
http://www.buttersco
tch.com/tutorial/Insta
lling-Your-PCsMemory
• Physical composition of Hard
Disk Drives.
• Storage is not electronic on
HDD. Name the type of storage
• Why is the HDD slower than the
RAM?
• Capacity and cost of storage on
HDD.
• What will happen when you
drop a hard drive while it is
working?
• Two sides of the same hard
drive.
View video on installing
the hard drive e.g.
http://www.butterscotch
.com/tutorial/InstallingThe-Hard-Drive
• How is data stored on optical
drives?
• Which is slower, hard disk
drives or CD drives?
• What is the storage capacity of
CDs, DVDs and Blu-ray discs?
• How do you distinguish
between CDs, DVDs and Blu-ray
discs just by looking at it?
See how to install the
CD/DVD drive at e.g.
http://www.butterscotch.co
m/tutorial/Installing-TheOptical-Drive
• How do Solid State Drives
(SSDs) differ from HDDs and
RAM?
• Which devices use SSDs?
• Which is faster, SSDs or
RAM or HDDs or CDs?
• Comment on the cost and
capacity of SSDs
Listen to a discussion on
solid state hard drives vs
mechanical hard drives e.g.
http://www.butterscotch.c
om/show/MechanicalHard-Drives-Vs-Solid-StateDrives
Ports
USB
Firewire
Thunderbolt
RJ45
VGA
connector
Standard
mini jacks
Adding extra storage using external drives is simple, fast and easy
• Peripherals that can
connect by using the USB
ports.
• What can you do if you
do not have enough USB
ports?
• Where would you
expect to find
Firewire ports?
• Which is faster –
Thunderbolt, USB3,
USB2, USB1 or
Firewire?
• Launched in 2011.
• Available on all new Apple
computers.
• Thunderbolt provides fastest
external connection currently
available.
• The connection supplies peripherals
with 10 Watts of power and speeds
of up to 10 Gb/s which can transfer
a full-length HD movie in less than
30 seconds or backup 1 year of
continuous MP3 playback in just
over 10 minutes
http://www.intel.com/content/www/us/e
n/io/thunderbolt/thunderbolt-technologydeveloper.html
Do question 1 to 10 of activity 1
Input
Pointing
devices
Keyboard
Joy stick
Scanner
game
controllers
Microphone
Camera
Touch
screen
Tablet
Sensors
• Why do we say
“QWERTY” keyboard?
• What can you do if you
need a keyboard on a
touch screen device?
• How do you connect a
keyboard to the PC?
Input data is text or
navigation or instructions
e.g. home and arrows and
F1 for help
• Mouse actions
• How do Touchpads
(trackpads) work?
Input: the position and
whether you click, right-click,
double-click, drag and scroll to
interact with the items on the
screen, draw, move, copy, etc.
• Discusss different type
of microphones that are
used by computers,
smartphones and media
tablets
Input: the sound that can be
recorded or the computer can
respond if it uses voice
recognition.
• Name devices that use
touchscreens
• Discuss the gestures to
control the computer on
touch screens
Capacitive touchscreens
respond to fingers (or things
that conduct electricity)
• Discuss specialised
game controllers for the
Xbox or PlayStations.
• Discuss the Wii motion
sensitive controllers
• Discuss Microsoft
Kinect for the Xbox
Buttons on game controller
users
provide options like shooting
and motion sensitive controllers
or cameras responds to your
movement to play games like
tennis
• How do you transfer
photos and video to
your computer?
Raw image files are sometimes
called digital negatives, as they
are not directly usable as an
image, but has all of the
information needed to create
an image.
• Types of scanners:
–
–
–
–
–
Flat bed scanners
3D scanners
Bar-code scanners
Magnetic strip scanners
Biometric scanners
• How do you edit text
after scanning a
document?
• What is a QR code?
A QR code (abbreviated from
Quick Response code) is a type of
matrix barcode (or twodimensional code) that has
become popular due to its fast
readability and comparatively
large storage capacity.
• Discuss scenarios where
the pen tablet (or the
Tablet PC) will be most
suitable and motivate
your answers
• Discuss the unique
characteristics of a pen
tablet
• Other input devices and
where they are used,
like
–
–
–
–
buttons,
scroll-wheels,
toggle switches,
rocker switches etc.
Text
Images
Sound
Sensors
• Other ways to input text
except for typing on the
keyboard
– Batch scanning
– Barcodes
– Speech recognition
• Devices you can use to
input video/photos
• How do you connect
these devices to the
computer?
They really have made a car that can drive itself in
city traffic without causing accidents
http://www.youtube.com/watch?v=-nYhKD8leAg
• Sound is most often
simply recorded
• Discuss other ways in
which sound input can
be used, e.g. MIDI
instruments, software
to record and recognise
sound patterns
• There are also light sensors,
gyroscopes, temperature
sensors, etc. that allow devices
to react to their environment in
ways that were not possible
before.
• Using the Scratch programming
language you can easily create
simple interactive programs
based on the input from a light
sensor, sound sensor, a button
and a slider on a PicoBoard
Answer question 1- 18 of Activity 2
Output
Monitor
Data
projectors
Printers
Speakers
and
headphones
• Explain the meaning of
VDU, LCD, LED, CRT.
• Monitors are typically
classified according to:
–
–
–
–
–
Size
Resolution
Response time
Connectors
Contrast ratio
• How does a data
projector work?
• Scenarios where a
data projector will
be suitable
• Compare with
Smartboard
• Explain hard copy and
soft copy output.
• Why would a small
business choose a
multi-function device in
stead of a simple
printer?
• How do printers
connect to computers?
Laser printers work by
melting toner onto the
paper.
Great for general
purpose printing.
Faster than inkjets.
Relatively cheap to run.
Inkjet printers spray
dots of ink onto paper.
Slower than laser
printers and more
expensive to run.
Can print photo quality
images.
Dot-matrix printers
use old technology
that works by striking
pins onto paper
through inked ribbons.
Still used for printing
invoices, bills, etc. and
where carbon copies
are needed.
• Two factors that determine the quality of
the sound output.
• How to connect to electronic instruments
and professional mixing boards, speakers ,
headphones.
• Sound output can
– tell you when a task starts / completes
– make sounds when you click on an
object
– to provide text-to-speech synthesizer.
• Answer question 1- 10 activity 3
Flash
drives
Portable
hard drives
Memory
cards
Disadvantages of optical disc drives (CD / DVD / Blu-ray)
• comparatively slow
• limited capacity
• expensive per GB compared to magnetic storage or even Solid State Disks (SSDs).
• easily damaged by being scratched or exposed to heat.
• comparatively large
• Electronic storage.
• Faster than optical/magnetic
storage.
• More expensive per GB than
magnetic storage.
• Less likely to be damaged.
• High capacity: range in size
from 1 GB upwards.
• Small physical size.
• Power from the computer,
through the USB port.
• Digital cameras store
their pictures on
memory cards.
• Different types.
• Connect the camera to
the computer with a
cable (usually USB), or
use a card reader.
• Same magnetic media as internal
hard drives.
• Connect via a USB, Firewire or
Thunderbolt connection.
• Large capacity – suited for backup.
• Two types
– 2.5ʺ drives: lower capacity and
can run on the power that is
supplied via the cable.
– 3.5ʺ drives: larger capacity but
needs an extra power supply.
• Modem (MOdulator – DEModulator)
was used to convert a computer’s
digital data into analogue audio
signals, and vice versa.
• Today data is transmitted digitally –
no conversion to analogue
– 3G modems
– ADSL modems
– Routers
• Answer Question 1 to 9
Desktop
Smartphone
built-in wireless connectivity such as Wi-Fi,
Bluetooth and 3G
Communication
ADSL modem or 3G modem
Input
keyboard and mouse or a microphone
small keyboard, touch screen and built-in
microphone and camera,
Output
19ʺ – 25ʺ screen, speakers,
headphones, can connect directly to
printer.
Built in (3ʺ - 5ʺ) screen, built-in speakers,
headphones.
Processor
Intel / AMD multi-core processors.
Uses ARM, Qualcomm, Apple CPUs
RAM
1 GB – 12+ GB
256 MB – 2 GB
Storage
Typically 250 GB +
8 GB – 64 GB
• Same data on more than one device e.g. contacts in your e-mail address
book and on your phone.
• If you edit the data on one device, the
data on the other devices is out of
date unless you synchronise the data
between devices (i.e. make sure that
each device has the latest copy of the
data). Software needed
• DropBox - ‘Cloud Syncing’.
• Answer question 1 to 7 of Activity 5