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

[Tom Wiltshire]

If you used PWM to control the brightness of the LEDs, the 'extra'  
resolution would be the resolution of the PWM - 8 or 10 bit is easily  
possible.

You wouldn't be able to tell much beyond 16 or 32 levels though, I'd  
have thought. The effect would just get smoother looking. Still, it's  
a good idea.

T.


On 3 Feb 2010, at 23:39, cheater cheater wrote:

> I wonder what is actually the maximum bit depth available with this
> sort of approach. Anyone know what the accuracy improvement with this
> sort of... hmm.. how do we call this? Anti-aliasing? Interpolation?
>
> D.
>
> On Wed, Feb 3, 2010 at 21:26, Ingo Debus <igg.debus at t-online.de>  
> wrote:
>>
>> Am 02.02.2010 um 15:22 schrieb Tom Wiltshire:
>>
>>>  you typically get 15 or 31 LEDs around the ring, which is 5-bit  
>>> accuracy
>>> at best
>>
>> Only if you allow only one LED lit at a time. If you allow one or  
>> two lit
>> (one = spot on, two = value is in between) you get almost twice the
>> resolution. If you can control the LEDs' brightness you can get  
>> even more.
>>
>> Ingo
>> _______________________________________________
>> Synth-diy mailing list
>> Synth-diy at dropmix.xs4all.nl
>> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
>>
>
> _______________________________________________
> Synth-diy mailing list
> Synth-diy at dropmix.xs4all.nl
> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy