I was thinking about using a hexadecimal control switch and ended up pondering what alternatives exist. For example, how about a quadrature encoder and an up-down counter. There appear to be a couple of quadrature encoder interface chips: LS7083N (also LS7183N*) and ELM403. One comes from LSI Computer Systems (LSI/CSI) in New York and he ...
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from Electronics Weekly http://www.electronicsweekly.com/blogs/engineer-in-wonderland/musing-hexadecimal-control-2017-01/
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