wrote:My
first choice would likely be a BBC B. If youre not familiar with them,
theyre 1982 32k 4MHz command line machines with inbuilt OS and BASIC,
and are stable as a rock. They also have lots of A./D I/O onboard, ...

snip

I'd avoid onboard A/D like the plague. The distances involved are much too
great to use analogue signals reliably.

Steve S