Mr C Johnston ICT Teacher www.computechedu.co.uk BTEC IT Back to Basics Mr C Johnston ICT Teacher www.computechedu.co.uk

Session Objectives Understand the difference between input, processing, storage and output devices, Be able to describe the different features of key hardware, input and output devices so you can recommend them to others, Know the different types of port on a modern PC and what they are typically used for, Know the different types of cables used to assemble a PC.

How many different pieces of computer hardware do you know

Basic Requirements INPUT DEVICES PROCESSING OUTPUT STORAGE

Hardware Requirements Video To Show How A Computer Works System Case Power Supply Mother Board Processor Storage Devices Input Devices Output Devices

Back to Basics Computers operate in bits – electric pulses of either 1s or 0s, How Binary Works Video Computer storage are measured in bytes which are groups of 8 bytes, As computer storage requirements so have the units: KiloByte (KB) – Digital 1000 Bytes/Binary 1024 Bytes MegaByte (MB) – Digital 1,000,000 Bytes/Binary 1,048,576 Bytes GigaByte (GB) – Digital 1,000,000,000 Bytes/Binary 1,073,741,824 Bytes Computer processor speeds are measured in Hz (cycles per second).

Types of Port Serial (9 / 25 pin male) – mice + other serial peripherals - obsolete Parallel (25 pin female) – used for old printers - obsolete Games / MIDI Port (15 pin female) – Joy sticks / MIDI devices - obsolete PS2 6pin mini DIN – mouse and keyboard USB 1/1.1 (1.5/12 mbps) , USB 2 (480 mbps) USB 3 (4,000 mbps) – used to connect a range of different peripherals to a PC, VGA – used to connect standard monitors to a computer DVI (3.96 gbps) – High speed digital video link IEEE 1394 FireWire (400mbps) – for high quality video capture RJ-45 Socket (10/100/1000mbps) – used for network cable connection RJ-11 Socket (56kbps) – used for telephone cable connection HDMI (10.2 gbps) – high definition multimedia interface – transfers video and audio in a single cable in high definition Mini Jack Sockets – used for input / output of audio eSATA (upto 6gbps) – High speed connection for external SATA drives

Types of Cable IDE Cable (40pin female) – used to connect HDD and Optical Drives to the motherboard SATA Cable - used to connect modern internal hard disk drives and optical drives to the motherboard Optical Drive Audio Cable – Connects drive to sound card so sound can be heard from it, Serial cable– used to connect devices to serial port Parallel cable – used to connect devices to parallel port USB cable – used to connect devices to USB port – plug is always the same to connect into USB socket but different types fit into devices FireWire Cable – used to connect devices to FireWire port Ethernet Cable – used to connect computers to a network HDMI Cable – used to connect HD video and audio equipment together

http://www.pirainoenterprises.com/computer_cable_information.htm http://www.itarticle.net/multiple-ports-on-your-pc-heres-a-primer-on-it