I have a few recent projects with topotables that have a
touch screen and
when they touch a button, somewhere (like tennis courts, the
etc...) on the topotable lights up. I use director and a USB
the table. The topotable maker sets up relays, so the USB
relays allowing more voltage to go to the lights.
However, I did use a PC and VB 6. I'm not great at VB, and it
only took a
couple hours to make an ActiveX that I load into director and
it turns the
lights on and off. There will be documentation that tells you
how to turn
the channels off and on.
Some USB boards are compatibla with EZIO and I believe
there's a mac version
of the xtra.