Most brilliant
MA


> On Nov 8, 2008, at 4:32 PM, Jinx wrote:
>
> Michael, I took a fresh look at the circuit this morning and  
> simplified it
>
>> http://home.clear.net.nz/pages/joecolquitt/stepper_as_encoder_simple.gif
>
> The pulse voltage at 'X' is easily discernable with the PIC's ADC or
> internal comparator and also still makes a good clean quadrature with
> an external comparator. Which is now inverted, as connected in this
> schematic, but that's irrelevant for step and direction detection
>


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