> Each device has three pins. On the pot, 1 and 3 are the sides of the
> resistor, and 2 is the wiper. On the encoder, pins 1 and two are the
> outputs, and 2 is the common. What I'm thinking about doing is
> connecting all three to the PIC, with pin 2 being an analog input
> capable pin. For pot use, I'd set pin 1 and 3 as outputs, and set 1
> high, and pin 2 as an analog input. For encoder use, I'd set pin 2 as
> an output and set it low. Then set pins 1 and 3 as inputs with weak
> pull ups and read away.
>

I think that should work fine! Another option that I've seen in some
products but never used is a "quadrature pot." It's two pots on one shaft
with the wipers in quadrature. You drive a couple analog inputs with it.
It gives the "rotate forever" feature of an encoder but without steps.

Harold




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