> I've been asked if I can conjure up  a device that will allow 6 increment=
al
> rotary encoders and 10 ADC inputs. I suspect this is for some sort of
> gaming doodad.
>
> I'm wondering on what the lists thoughts are on saving 12 port pins with
> the following.
Two ideas
1) If large IO is a concern I would be tempted to use a small CPLD to
route the encoders to the MCU (make them addressable like a RAM), and
then perhaps give it some logic to generate an interrupt on change for
the processor.
2) Of course, if that is not an option maybe a multiplexer chip could
do the job (ie. the 16:1 CD4067 analog multiplexer). Though a quick
search does not reveal a one chip (through-hole) mux solution to your
problem.

--=20
Jason White
--=20
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