Bill,
Wheel chairs can be controlled by a set of switches that are activated
by either blowing or sucking on a tube. A provided of such devises, prosthetic
devices, should be listed in your phone book. Alternatively get in touch with
a surgical supply house, they would have directories of such suppliers.
I like the tongue activated switches. Perhaps one could be adapted to
operate the most common functions of a SAT.
Have a nice Easter.
Newton
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