Computer Hardware collection of bytes song, photo Read P 30 System Unit CPU or microprocessor...
Transcript of Computer Hardware collection of bytes song, photo Read P 30 System Unit CPU or microprocessor...
Computers Digital Binary
They have 2 states 1 and 0 Closed and Open
Bit is smallest unit of data 1 or 0 On or off
Byte = 8 bits grouped together File
named collection of bytes song, photo
Read P 30
CPU or microprocessor
Central Processing Unit Computer chip Performs calculations Controls computer operations Brain of computer Manufactured by Intel and AMD
Clock Speed Measurement of processing speed Measures the number of instructions per second Clock speed is rated in gigahertz (GHz) Higher clock speed is faster computer The higher the GHz of a computer the faster
Multi core CPU
Contains multiple processors Dual core – 2 processors Quad core – 4 processors A multi-core processor works
on more than one task at a time making it a faster processor
32 bit vs. 64 bit A computer WORD measures the amount of data the
computer manipulates at one time as measured in bytes
Old CPUs: 32 bit processor (handle 32 words at one time)
New CPUs: 64 bit processor (handles 64 words at one time)…twice as fast
Memory Chips located in system unit Stores data and instructions while end user is working
with them RAM ROM
RAM Random Access Memory Stores data and programs currently used Volatile-content is erased when computer is turned off Close a program and RAM is erased Measured in bytes More RAM allows more applications to run at a time More RAM the better 8 MB is better than 4
Storage
Hard Drive Optical Disks (CD, DVD): external and large capacity Read optically using laser beams – must protect surface Burning is writing to optical drive Software is required (P49)
Flash Memory Small card (P51) must use card reader USB flash drives (thumb or jump) hooks into USB port
Network Storage Remote storage Not on computer Accessed through local network such as M drive or student network drive Cloud accessed through Internet
Google Drive or Sky Drive
Smart Card Credit card with processor, memory, and storage Debit card
Input Device Keyboard Mouse Touch Screen (smart phone) Touch Pad (credit card machine) Scanners and Readers (barcode) Radio Frequency Identification (RFID) Read by RFID reader Attached to livestock, price tags, products RFID identity document P61
Optical Character Recognition (OCR) for check processing Audio (voice input with speech recognition) Biometric Readers (fingerprint)
Output Monitor CRT (cathode ray tube) Flat Panel (P67) LCD LED OLED
Display screen Used for a notebook or mobile phone
Output Data and multimedia projector
Displays on screen Measured in dots per inch (DPI); the higher the DPI the better the resolution
Printer Speed is measured in pages per minute Printed copy is called “hard copy” Inkjet
Sprays on and inexpensive, good quality for home use Laser
Standard for business and uses toner powder Good quality and prints 600 to 2400 dots per inch with 15 to 30 pages per
minute Audio
Voice, music, headphones, speakers
Your Turn Assignment 1 Go to a computer web site such as Dell.com or HP.com Configure a computer consider the following: RAM,
GHZ, Hard drive Space, processor (Dual Core), output and storage devices
Use a table like the following:
Manufacturer Processor (CPU)
Memory (RAM)
Optical Drive Hard Drive Price GHZ Monitor
Dell Intel Dual Core
32 GB Blue Ray or CD/DVD 300 GB $1000
Your Turn Assignment 2 and 3 Using shapes and text, illustrate the difference
between bits and bytes Using shapes, text, images illustrate the choices for
storage including hard drive, auxiliary, and cloud.
Your Turn Assignment 4, 5, 6 Quiz Yourself page 75 Practice It 2-1 page 75 Use the following website: http://www.memorysuppliers.com/
Practice it 2-2 page 75