[sdiy] Pots vs Encoders, was Re: [sdiy] dave smith *instruments*

[Dave Manley]

Antti Huovilainen wrote:
> On Tue, 2 Feb 2010, Dave Manley wrote:
> 
>> 5. Spinning the knob as quickly as possible ~360 degrees results in 
>> unpredictable response, either no change, max change, or anything in 
>> between.
> 
>> I don't see any glitchy behavior.  Not denying that others see it, or 
>> I won't see it in a year on this Mopho, just reporting what it 
>> currently does.
> 
> #5 is glitchy behaviour. Properly scanned encoder should at worst count 
> to slightly less than actual position (missing some transitions due to 
> bouncing).

The speed required to do this is pretty extreme.  Let me see if I can 
capture the switching and scan rates.  I don't have a storage scope at 
home so this could be difficult.  Also, I'll repeat the test starting 
from an intermediate value, to see if the value always increases, or if 
it ever decreases.  The previous test always started at the min value.

-Dave