[sdiy] New Aquisition

[John L Marshall]

Would you rather have three independent gates or demux to one of eight
gates?

John
----- Original Message -----
From: Jim Patchell <patchell at silcom.com>
To: <synth-diy at dropmix.xs4all.nl>
Sent: Wednesday, October 17, 2001 7:08 AM
Subject: [sdiy] New Aquisition


>     We are cleaning out the attic here at work.  I found a track ball.
> It is pretty nice, about 1 1/2" diameter ball and three buttons...two
> problems...first, to reverse engineer the thing to find out how it
> interfaces (this is only a minor problem)...the second problem...anybody
> got any idea's on how I should use this thing with a synth?
>
>     My idea was just to make a module that would have two control
> voltages out (for X-Y) and three outputs for "gates" that are activated
> by the three buttons.  This is pretty straight forward.  If anybody else
> have a more inspired idea?  I am open to more idea's.
>
>     By the way, this is a Cognex Trackball, dating from around 1995.  If
> anybody has the documentation for this thing, it would make my reverse
> engineering much easier.  When I transfered all the documentation for
> our cognex system to another employee, who then quit a couple of years
> latter and took it all with him, has sort of left me stranded.
>
>     -Jim
>
>