Hi Martin,
could you also send me some technical information on your switches,
similar to Geoff? Thanks.
Dave ;-)
-----Original Message-----
From: p=NHS NATIONAL
INT;a=NHS;c=GB;dda:RFC-822=ASSISTECH(a)JISCMAIL.AC.UK;
Sent: Thursday, August 15, 2002 6:55 PM
To: p=NHS NATIONAL
INT;a=NHS;c=GB;dda:RFC-822=ASSISTECH(a)JISCMAIL.AC.UK;
Subject: single switch interface
Dear all,
I have custom made a number of single switch interfaces , which
utilise tone
feedback, to allow operation of
two or more functions from a single switch. These have all been
wheelchair
based. A couple of examples would be:-
a. User with an environmental control who has an Invacare
Spectra Plus with
handset control of Tilt-in-Space.
Client not able to use handset.
switch press beeps function
( seconds)
0 to 1 none short press to
environmental
control
1 to 2 1 tilt-up (
incremental ie
for 2 seconds ))
2 to 3 2 tilt-back (
incremental )
b. User with an environmental control. Storm wheelchair fitted
with DX_RJM
joystick as a chin control combined with
DX_G80A joystick requiring selection of on/off and drive
program.
switch press beeps function
( seconds )
0 to 1 none short press to
environmental
control
1 to 2 1 G80A drive
program increment
2 to 3 2 G80A power
on/off
The design uses a PIC so that delays between beeps, number of
functions,
duration of pulses can all be adjusted to
suit. Power is derived from the wheelchair batteries.
I have done a few of these recently for Oxfordshire Wheelchair
Service.
Do you know of anything else that would do the job? If not
would this sort
of thing be useful to you? If so I will look at how I can make
this more
widely available. One thing I have been thinking about is
selling it as a
kit for local assembly as a custom device.
thanks
Martin Wozencroft
Clinical Electronics Engineer
Posture, Independence and Mobility Service
Oxford Centre for Enablement
Windmill Road
Headington
Oxford OX3 7LD
Phone 01865 227317
David Hobbs
Rehabilitation Engineer
Regency Park Rehabilitation Engineering
PO Box 2438, Regency Park, SA, Australia, 5942
Ph: + 61 - 8 - 8243 8338
Fax: + 61 - 8 - 8243 8337
Web: http://regencyrehab.cca.org.au/
Email: [log in to unmask]
"Service to others is the rent you pay for
your time here on earth" - Muhammad Ali
|