Re: [CAD_CAM_EDM_DRO] Encoder options

> A better approach would be to put a differential driver on a tiny PC board
> right at the encoder, and use a differential receiver at the Gecko.
> The AM26LS31 and 32 devices were the original chips for this purpose,
> but there are now some chips like the 75ALS191 series that are better.

US Digital sells differential line drivers. A separate power supply is
still required because the Gecko will only provide 50ma, but the idea makes
sense.

Doug