Hi,
years ago I made a simple controller for the rudder in  a sail model boat.
The encoder was simply one wheel of a mouse (old type with wheel and led)
and I entered directly on RA0-RA1 of a Pic16F628a, how much it was precise
I don't know but it runs.

Now I am out of home for few days, if you want I can look for the code
later.

Renzo


2013/6/10 Harold Hallikainen <harold@hallikainen.org>

> I use the technique at http://www.piclist.com/techref/microchip/qenc.htm =
..
> Sometimes it's better to use a timer interrupt instead of an interrupt on
> the encoder itself it there is a lot of contact bounce. The timer interva=
l
> has to be small enough to handle the fastest expected rotation.
>
> Harold
>
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