YES NOPE9 wrote:
> #1   Using nitinol wire to push the button.   Current through the
>      wire =3D=3D> Heat =3D=3D> wire expands

There are off the shelf products that do this already.  I vaguely remember
they are called something like "electronic pistons".

> #2   Using tiny audio
> speakers to push a wire in a coax cable shell.  Like the cables used
> for bicycle brakes.

That sounds like quite a kludge.  Why not just a ordinary solenoid?  It is
meant to move a plunger, as apposed to a speaker which is meant to move air=
..


********************************************************************
Embed Inc, Littleton Massachusetts, http://www.embedinc.com/products
(978) 742-9014.  Gold level PIC consultants since 2000.
--=20
http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist
.