Hi tom
I use the uc100 and the basic breakout board C13 from cnc4pc.com. the c13 is a direct pinout board no opto-couplers.
I have also use a powered usb hub so I don't have a low voltage problem View attachment 88691
I have never tried an ethernet board.
steve
Thanks Steve. I have a lot of questions but will reserve them as I move through, or attempt to move through, the electronics portion of my build.
Tom S