[Roger]

Do you mean (for example) 4 DIOs sending a binary signal for 16 numbers? (And no, I don't have many numbers, but I can think of ways to expand that.) Just using the signal portion of the PWM wire, right? (The Keeper of the Numbers says we have 5 DIOs free for use.) Heh -- I had thought of that too, when we originally thought of using DIOs. It seemed too obvious to be true. Could it really be that simple? Thanks, Mark!

Of course, I spent the day trying to make connections on an older robot to test all this, and now discovered (after connecting all the dots, so to speak) that LabVIEW and the Arduino programming port don't play nice together. I am making a nice collection of laptops around me just to test this.