The Mouse and Keyboard By Zach Postma

The Computer Mouse

What it is A device used to move a pointer around a screen, it also has one or more buttons to interact with whatever it is pointing at.

How the basic mouse ball works When you move the mouse, a small ball inside is rolled. Touching the ball are two perpendicular rollers, when the ball is moved the rollers spin various amounts and speeds depending on what direction and how fast the mouse is moved. The rollers are connected by a shaft do a small disk with many holes in it. When the rollers spin, the disks spin.

How it works cont. On opposite sides of the disks there are LED’s and infrared sensors: one for each disk. When the disks spin the light pulses into the sensors through the holes, this pulsing directly corresponds to the movement of the mouse. The DSP (Digital Signal Processor) in the mouse changes the information from the sensors into binary data that the computer can understand and the computer moves the pointer using that data.

Other types of mice Optical Mice LED mouse Laser mouse Uses a small LED light and a sensor Laser mouse Uses a small laser and a sensor Blue Track mouse Uses a powerful blue laser and a sensor

Other types of mice cont. Connection methods How it hooks up to the computer Ps/2 connector Old connector: better than USB USB connector New connector Wireless Usually uses USB, more mobile but requires batteries and the connection is not always as good

History of the mouse 1968-Douglas Engelbart creates the first mouse 1981-The Xerox 8010 was one of the first home computers to include a mouse 1991-Logitech releases the Cordless Mouseman, the first wireless computer mouse 1995-The ProAgio, the first mouse with a wheel, is invented 1996-The Microsoft Intellimouse was invented, it was the first mouse with a button under the scroll wheel like we use today

History of the mouse cont. 1998- Logitech creates the first USB mouse 1999- Logitech creates the first optical mouse 2001-Logitech introduces the first cordless optical mouse 2004-Logitech introduces the first laser tracking mouse

Mouse manufacturers Logitech Microsoft Apple Mouse Systems

The Keyboard

What it is The keyboard is a device that lets you input letters numbers and symbols into the computer and communicate with it

How it works You press a key Pressing the key completes a circuit inside of the keyboard The processor inside the keyboard compares the location of the completed circuit to that location in it’s character map The keyboard transmits the character to the computer

Types of Keyboards Keys: Connection: Capacitive Rubber dome Metal contact Foam element Membrane Connection: Wires Wireless Infrared Radio Bluetooth

Types of Keyboards cont. Compact Ergonomic Special Internet Multimedia Gaming Backlit Virtual

Types of keyboards cont. Key setups QWERTY DVORAK ABCDE QWERTZ AZERTY

History of the Keyboard 1877-The typewriter is invented 1978-10 Finger typing is created QWERTY is created 1936-DVORAK is invented 1984-The first keyboard is invented

Manufacturures AOpen Creative Logitech Microsoft Saitek

Prices Mouse $4-$24,300 Keyboard $2.59-$4440

Bibliography http://www.freefoto.com/preview/04-34-12?ffid=04-34-12 http://www.dvorak-keyboard.com/ http://forums.techarena.in/portable-devices/1001618.htm http://www.markpascua.com/2008/10/04/bluetooth-laser-virtual-keyboard/

Bibliography cont. http://www.interfacebus.com/Computers_Mouse.html http://www.directron.com/msun10.html http://www.fabstuff.net/products/664 http://www.geeks.com/products.asp?cat=KYB http://most-expensive.net/10-computer-keyboards

Bibliography cont. http://www.howstuffworks.com/keyboard.htm http://weburbanist.com/2009/04/05/evolution-of-the-mouse-classic-to-cutting-edge/ http://www.hexus.net/content/item.php?item=19231 http://inventors.about.com/od/computerperipherals/a/computer_keyboa.htm http://www.brighthub.com/computing/hardware/articles/10336.aspx http://www.essortment.com/all/keyboardhisto_rdqo.htm http://www.howstuffworks.com/mouse.htm   http://www.epinions.com/content_1276878980 http://genevalunch.com/files/2008/12/145378.pdf http://www.tactuskeyboard.com/history.htm