Zygo-USA Optimist MMX-3 Specifications download pdf (Page 11)

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Problems Associated With Custom Systems

Discussions with therapists who have had experience setting up custom integrated

systems revealed several key issues that should be considered when considering laptops

for A.A.C. The following table gives a summary of these issues and offers some potential

solutions for each. These and other issues are discussed in greater detail on the

subsequent pages:

Identified key points to explore and

address when considering laptops

for A.A.C.

Potential solutions used in existing integrated

systems

Durability of laptop computers –

standard laptops can be prone to hard-

drive, screen and port damage.

In other systems durability is addressed using

ruggedised computers, including the Panasonic

Toughbook, which will take more disruption then an

ordinary laptop. Pen-Tablet computers are also an option

as they are light, portable and durable. They also have

touch screens to allow easy access to the

communication software.

Fujitsu sell plastic screen protectors for their tablets and

soft cases that allow use of the device whilst in the

cover.

Computer mounting, in particular

reducing and avoiding problems

caused by on-going vibrations, stability

of chair after adding the mounting

system.

The problem of vibrations with mounting seems to be

remedied using a piece of foam (or other shock

absorbing materials) between the laptop and the tray,

stopping any damage caused by the vibrations of the

power-chair.

Volume and voice quality eg. In

classrooms or pubs where there is

background noise.

Adding battery powered speakers to increase volume

and improve sound quality. Companies like Gewa

manufacture mini amplifiers that can be attached to

increase volume.

Wearing and breakdown of cables and

port damage due to cables being

connected and reconnected.

A customised heavy duty lock in/easy release electronic

connector maybe a potential solution if it is necessary to

remove the tray and/or laptop regularly, this connector is

easy to both lock and release.

Battery life for laptops. Laptops can be powered from the wheelchair battery

requiring connection from the wheelchair to the laptop

allowing the computer to run longer then its battery can.

Visibility; when driving, when outdoors

in direct sunlight.

Tablet PCs, such as the Fujitsu, provide the option for an

outdoor viewable reflective L.C.D. screen.

Fold-away mounts that allow a device to be swivelled out

of the way are available and accommodate most A.A.C.

devices, laptops and tablets, but are very expensive.

Access method. Switch adapted mouse or keyboards can allow a switch

user some access to standard laptop programs.

Access to laptop programs. Some of the tablets offer programmable application

launch buttons.

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Zygo-USA Optimist MMX-3 Specifications Page 11

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