First look at Service USB gadget

[DunbarX at aol.com]

I got one of these, a general purpose I/O device. It simply plugs into a 
USB port on a Mac. It is a stronger, though very similar version of the old 
Beehive "ADB I/O" device. Stronger mainly in that USB is much faster than 
Apple's ADB bus. It is completely self contained. Plug and play. It comes with 
externals for revolution, as well as other environments.

It is a fabulous toy. Basically, a suite of rev commands and functions 
allows one to "write" (open and close output switch contacts) or "read" (detect 
the state of input switch contacts). There are also analog inputs with 12 
bit resolution, and pulse width modulation is implemented internally

Almost anyone could create an alarm system, a light show or the like with 
radio shack components. You need hobby level electronic know-how to do 
anything really cool, but your Mac can completely control the world. It is 
hardware I/O for the rest of us.

Craig Newman


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