John, it strikes me that there might be a computer program that does this.  Your physical therapist might know of something of this nature.  Also, check out computer games intended for other purposes.  I think some include such an element as part of competition.

Here's wishing you a speedy recovery.

David

---- John Rodgers <jrodgers113@GMAIL.COM> wrote:
> Dear Volks,
>
> Since my stroke, I find I need a therapy device that is not generally
> available and maybe someone here who is into electronics can point me in
> the right direction.
>
> I  need to exercise my hand and arm by pointing. It is actually a
> coordination exercise. I need to actually touch what I am pointing at
> repeatedly and the object pointed at needs to change positions randomly.
> What I propose to have made is a panel with lots of little LED lights which
> will light randomly and stay  lit long enough for me to extend my arm and
> touch the light. Needed is a random pulse generator to work the lights. I
> have no idea how that would work or how it would need to be wired but
> surely there must be a way. The length of time the lights stay on must be
> adjustable.
>
> I solicit your suggestions, comments and help.
>
> Thank you,
>
> John

--
David McNeely