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Analog computing is undergoing a resurgence
(www.freethink.com)
This is a most excellent place for technology news and articles.
I'm not sure with that information if internally they are analog or not. But at least it sounds like smart limit switches, which it does make sense to be more efficient than having a computer monitoring a signal and comparing it to the desired value.
This impressed me:
I'm always wary of extraordinary claims (Theranos and all) but this could potentially be interesting.