Lesson Objectives To understand that users with disabilities require different input and output devices To be able to identify these devices and explain.

HARDWARE

• Lesson Objectives

To understand that users with disabilities require different input and output devicesTo be able to identify these devices and explain how they can be used

HARDWARE

• Users with specific needs

http://www.bbc.co.uk/news/uk-11898534

• Computers have revolutionised the lives of people with disabilities.

• There are many input and output devices available that allow people with disabilities to use computers in the same way as an able bodied person. Sometimes, they enrich the lives of disabled people by allowing them to do things they wouldn’t ordinarily be able to do.

HARDWARE

• Task 1:

In groups of 2 or 3 complete the mind map.

Think about how you might use a computer if you were visually impaired or had limited mobility. • From each node write the input and output devices that you could not

use. • From each device list solutions that you think would overcome these

struggles

It does not matter if your solutions do not exist, as long as they are HARDWARE. Think outside of the box. We will look at real life solutions later in the lesson

Users with specific needs

Visually impaired

Audio reader

Keyboard

Monitor

HARDWARE

• Visually Impaired Input

Braille is a system which allows blind people to read and write using an alphabet of raised dots on sheets of paper

• Blind people can use braille keyboards to input text directly to the computer.

• Many blind users may use a braille overlay on a QWERTY keyboard.

HARDWARE

• Visually Impaired Output

Braille users can also use braille printers that, instead of putting ink on the paper, punch braille dots from behind the paper to form raised letters

Screen readers (technically not hardware, so be careful) – Magnification software to enlarge text, speech output software which reads text and outputs through speakers or headphones and devices that read text and concert this to a braille interface with raised symbols

HARDWARE

• Limited Mobility input

Eye tracker/TyperThese devices use a camera to track the movement of the eyes and can detect where the user is looking. A slow blink or a stare is used to select

Voice InputFor those who find it difficult to operate a keyboard, spoken commands can be translated into text by software and used to communicate or instruct the computer to take actions

HARDWARE

• Limited Mobility Input

JoystickCan be used to control the mouse on screen for people with limited movement in their fingers. Specially adapted joysticks have been made to control with the mouth

Adapted KeyboardsKeyboards can have larger buttons or different shapes. This keyboard is designed for people with only one hand.

HARDWARE

• Limited mobility input

Foot MouseFor users with no or limited mobility in the hands. Controls the mouse in the same way using feet.

Puff-Suck SwitchThis device is a switch which can be turned on and off by either blowing or sucking into a small tube. The software then interprets the actions to take

HARDWARE

• Limited Mobility Output

ActuatorsThese devices create a physical movement in response to a computer command and are incorporated into a range of everyday devices so that those with limited physical mobility can operate them using a suitable input device.

Voice SynthesisersSpoken output from a computer can be used for those unable to communicate verbally.

HARDWARE

• Task 2:

Complete the input devices test on the Dynamic Learning website.

HARDWARE

• Task 3:

Complete the exam style question