[Joe Johnson]

Originally Posted by Alan Anderson

Absolute rotary encoders don't have this problem. Models with many different types of digital output are available: parallel Grey code, I²C, SPI, synchronous serial, etc. A quick look at the Digi-Key catalog suggests that something appropriate for an arm or swerve steering sensor costs about $25 (which is admittedly more expensive than a good potentiometer).

But you need to bring your toolbox up to date. The Talon SRX motor speed controller has sensor inputs built in, and that's a simple way to add more analog inputs exactly where they are needed.

For our applications, most sensors use 8 turns of a 10 turn pot, so things are a bit tricky.

The Talon SRX looks amazing but we have a bunch of legacy Talons SRs and Victors 888s to use (and we are on a limited budget).

I am leaning toward the REV RIOduino at this point I guess.

Thanks for the input...