Neil's News

Gray Code

17 April 2003

[Over-populated circuit board]Converting the sin/cos bits from a pair of optical encoders into pulse/direction bits sounds like, well, a two-bit problem. It turns out that this is surprisingly complex. Here's the solution I designed and built seven years ago. I've reanalysed it, and it still seems to be the best possible solution using discrete logic. However I'm now exploring a couple of other options which weren't available in '96...

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