> Get a copy of "Omega Race Position Encoder" from the spies web page
> It is a very nice description of building an optical encoder with
> a little EPROM/latch state machine that does the quadrature decoding
> and bit scrambling.
>
> I should have the rest of the encoder figured out later today, so
> I'll have the full decoding table then.
Is the bit pattern really grey-code? i.e. only one bit changes from one
position to the next. This would make sense. If it is, you could use an
up/down counter and 2 (I think 2) binary to grey-code converter chips.
Of course those chips are probably harder to come by than burning a prom
with a table - but there was a 74xxx part to do it.
Just my 2 cents.
BTW, I once had a chance to buy Omega Race for $80 but I passed <kick kick>
-- ___ __ _ _ _ | \ / \ | | | || | Engineer/Programmer | _/| || || |_| || |__ " What makes someone care so much? |_| |_||_| \___/ |____) for things another man can just ignore. " -S.H.
