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

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

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.

PC Connections

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

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

Video Display Ports VGA Port to Projector HDMI to External Display

USB Ports Transfer data & electricity Plug and play (PnP) & Hot swappable High speed 2.0- 480Mbps 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.

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

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

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.

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

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

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

PC Connections

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

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

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:

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

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

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

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

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

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

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.

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

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.

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

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)

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

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

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

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

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

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

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

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

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

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

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

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

computer hardware Unit 3