1. computer hardware Unit 3
8-10 days including projects, review, and test.

2. Objectives Describe how a computer represents data
Identify system components for input & output
Define input devices and explain how to use them
Define output devices and explain how to use them
Identify types of storage devices and media

3. Memory Size 1’s & 0’s Use for storage size Hard drive, RAM, CD/DVD
Term
Amount
Example
Bit
1 or 0
Byte
8 bits
Letter or number
Kilobyte (KB)
1024 bytes
250 word poem
Megabyte (MB)
1 million bytes
4 200-page books
Gigabyte (GB)
1 billion bytes
341 photos at 3MB each
Terabyte (TB)
1 trillion bytes
300 hours of video
Petabyte (PB)
1 quadrillion bytes
223,000 filled DVDs
1’s & 0’s are really +5v and 0v of electricity.
Link takes you to a text to binary converter. See what your name would be in binary.

4. PC Connections

5. PS/2 Ports (Legacy)
Purple
Keyboard
Green
Mouse
Both 6 pin female

6. Video Display Ports VGA HDMI Blue 15 pin female Video only, analog
Digital HD video & audio through one cable

7. Video Display Ports
VGA Port to Projector
HDMI to External Display

8. USB Ports Transfer data & electricity
Plug and play (PnP) & Hot swappable
High speed
Mbps
3.0- 5Gbps
Average digital photo is 5MB. Average mp3 song is 3-4MB. At typical USB 3.0 speeds, you can transfer about 10 songs per second or 12 pictures per second. FRONT & BACK of PC.
USB 3.1 is 10Gbps
Up to 127 devices per USB port…but you’d obviously would need several USB hubs.

9. Network Port NIC or Ethernet Use an Ethernet Cable or Network Cable
RJ45 connector
8 wires/pins
Connect to wired network
Most reliable network connection
LED activity and connection lights

10. Modem (Legacy) For Dial-up Internet Phone cable Connect to Phone jack
SLOW SPEED!
Phone cable
RJ11
2 or 4 wires/pins
Smaller than Ethernet
Connect to Phone jack
56kbps
Modulate Demodulate
Analog

11. Audio Ports- 3.5mm Line In Line Out Microphone Audio into PC
Record Player or CD Player to PC
Line Out
Headphone
Speakers
Microphone
Being phased out. USB everything now.
On some laptops, audio in & mic are on same port. Internally it can differentiate the signal.

12. Other Ports S-video (OLD) DVI (OLD) Firewire (OLD) Digital video out
HD video out
Firewire (OLD)
Replaced by USB
Other ports: Display port

13. Ports on Your Computer On Laptop Desktops in room, draw & label ports
Laptop- all sides
View & connect wires to class PC’s
Practice connecting wires

14. Review 1 Practice Connecting Cables Handout
What port would you connect the device to?

15. PC Connections

16. Review- 4Q Which video port sends HD audio & video through one cable?
HDMI
What common port transfers data and can charge your cell phone?
USB
How many pins is the old keyboard & mouse ports?
6 pin female
The VGA port is what color and how many pins?
Blue, 15 pin female

17. Review- 3Q Which port would you connect to get access to a network?
Ethernet
Joe wants to convert his old records to CD’s. Which port can you plug his record player into?
Line In
Which port is a common plug and play one?
USB

18. Keyboard- Input Device
Standard
Ergonomic
Wireless
Flexible
Virtual
Bluetooth
Ergonomic: allows use of more natural hand, wrist, and arm position. Help prevent carpal tunnel.
Wireless: Has a USB device to receive/transmit signals.
Backlit: keyboard lights up.
Flexible: rolls up for travel; is water-resistant.
Virtual: w/ Bluetooth connection; portable.
Bluetooth:

19. Mouse- Input Device Optical Laser Wireless Touch Mouse LED on bottom
No mouse pad needed
Not good on glass
Laser
Laser light on bottom
20x better sensitivity
Wireless
USB Receiver
Optical or Laser
Touch Mouse

20. Voice Recognition- Input Device
Speak commands into PC & enter text
Software must be installed
Disabled people use

21. Scanner- Input Device Flat-bed Scanner Bar Code Scanner/QR code
Scans photos & documents
Has OCR
Bar Code Scanner/QR code
OCR- Optical Character Recognition for scanning text and allowing editing of it

22. Biometric- Input Device
Recognizing a characteristic
Fingerprint, iris, facial, hand, voice

23. Other Input Devices Touchpad Pointing Stick Trackball Touchscreen
Digital Pen
Microphone
Game Controller

24. Review- 3Q
You just got a fancy, new glass computer desk. Which type of mouse should you use?
Laser
How does a wireless mouse connect to a computer?
USB adapter
If a person cannot type, what would you recommend so they can use a computer?
Voice recognition software/microphone

25. Display- Output Device
LCD/LED Screens
Very thin, uses less energy
Screen resolution
# of pixels displayed
1600 x 900
Measured diagonally
15.6”, 17.3”, etc.

26. Printers- Output Device
Quality- DPI
Dots per inch
More dots= better quality
4800 x 1200 (H x V)
Speed- PPM
Pages per minute
Black & Color speeds
Color is slower

27. Dot Matrix Printer- OLD
Pins hammer into ink ribbon
Connected paper with guide holes
Not good quality
Slow & noisy
Impact Printer
All other printer are non-impact.

28. Inkjet Printer Nozzles spray liquid ink Very good quality Quiet Fast
Inexpensive

29. Laser Printer Laser inside Toner is a powder Very fast printing
Thousands of pages from toner
Very fast printing
High quality prints
Cost more than inkjet
B&W or color
4 color toners (CMYK)

30. Other Printers All-In-One Thermal Plotter Print, copy, scan
Some have fax too
Inkjet & laser
Thermal
Heat-sensitive paper
Receipt printers
Plotter
Large paper
Drafting, posters

31. More About Printers How they connect Duplexing
Wired- USB or network
Wireless
Print from any PC, phone, tablet
Duplexing
Printing on both sides of paper
Make money from ink & toner
Printer: $50
Ink Cost: $6
Price You Pay: $20-$30

32. Activity Research a Printer Find out & fill in specifications
Teknimedia
A2.4- Input & output devices
A2.12- Input devices
A2.13- Output devices
A2.14- Connecting devices
A2.15- Quiz

33. Review- 4Q Which type of printer uses a hammer that strikes a ribbon?
Dot matrix
You just received a new toner for your printer. Which type of printer do you have?
Laser printer
What is the measurement of a good quality print?
Dpi
If you want to know how fast a printer prints, which feature are you interested in?
ppm

34. Hard Drive Long-term storage Magnetic Platters/moving parts inside
Speed is rpm
5400rpm HD
Higher= read/write faster
Measured in GB, TB
3.5” desktop
2.5” laptop

35. Solid State Drive Uses flash memory No moving parts Less power & heat
More expensive than magnetic drives
2.5” or 1.8”

36. External Hard Drive Plug into USB port Portable Desktop
One cable, power & data
Gets power from USB
Desktop
Two cables
Power adapter
USB cable

37. Flash Drives & Cards Use flash memory chips USB Flash Drives
Memory Cards
SD/SDHC, microSD, CF, Memory Stick
Safely eject media 1st!

38. Optical Discs & Drives Uses a laser to read/write data -ROM= Read Only
-R= Record Once
-RW= Rewritable
BD-RE
Type
Capacity CD
700MB or 80 min. audio
DVD
4.7GB or 2 hours video
Double-sided DVD
8.5GB
Blu-ray
25GB or 4.5 hours HD video
Dual-layer Blu-ray
50GB

39. Review- 3Q
T/F. Hard drives are used to temporarily store what you are creating.
False
Which removable storages could you use to copy pictures from one PC to another?
Flash Drive, Memory Card, Ext. HD
Which optical storage would be used to store music and then later erased to store photos?
CD-RW

40. Review- 3Q How much data can a Blu-Ray DVD hold?
25GB
If pictures are about 3MB each, how many pictures could you put on a Blu-ray disc?
About 8300!
Which storage device has no moveable parts?
SSD/Flash

41. Activity
In groups of 2, go shopping to find parts & accessories

42. computer hardware
Unit 3