All,
   Well it looks like all things being equal, they aren't.  I purchased=20
an incremental encoder (PEC12R Incremental Encoder) and did a little=20
testing:
(A & B pulled to Vcc via a 10K, C connected to GND)
- The encoder puts out a single pulse for each detent position.
-- For clockwise rotation the A Signal falls while B is held high.
-- For counter-clockwise the  A Signal falls while B is held low.

POOR ASCII drawing:
Clockwise
A -----|____|-------|____|-------
B -------|_____|-------|_____|----
Counter-Clockwise
A -----|____|-------|____|-------
B ---|_____|-----|_____|--------

   No counting or multiple pulse between detents, just the phase shift=20
between A & B that indicate the direction of rotation.

-Phil-
On 4/6/2017 7:56 AM, Phil Keller wrote:
> Thanks to everyone for your input and suggestions.  It looks like they=20
> will solve my problem and I think I have enough working knowledge so=20
> now the next step is to purchase a couple play with them on the bench.
>
>   Thanks
>
> -Phil-
> On 4/5/2017 2:04 PM, Phil Keller wrote:
>> I am looking into a design where I would like to use a single
>> incremental encoder for two separate controls.  In order for me to
>> accomplish this I need to understand what the outputs (A & B) are held
>> to when there is no rotation.  Are the outputs held OFF (aka open), ON
>> or one of each based on the last rotation?  What happens when the user
>> rotates the knob very slowly?  Is the pulse a fixed width or is it base
>> on shaft rotational speed?  What is the state of the outputs if the
>> rotation is halted between detents?  Is the nominal output state
>> manufacture dependent or is there a "standard".
>>
>>     Thanks for any guidance you can provide. tle testing.
>> -Phil-
>

--=20
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