[sdiy] Resolution of analogue potentiometers?
magnus at rubidium.dyndns.org
Wed Feb 13 09:12:40 CET 2013
On 02/13/2013 12:53 AM, Michael Zacherl wrote:
> on some VCOs I have about 15 octaves on a 300° pot.
> That's not very practical in many situations, but doable.
> Often I just touch the front of the knob to move it for fine adjustment.
> (I do have additional 'fine' pots)
This is a case where the resolution of the pot is not the real limit,
but the range of the pot. A small fine-tune pot makes sense even if you
have sufficient resolution on the coarse tuning, since it becomes hard
to do fine-tuning anyway.
Using ten-turn pots or gears helps with bringing it to one knob, but
sometimes you turn many turns to get where you want. The two-pot
arrangement make sense in this regard.
So, I don't think it's the actual resolution of the pot which is the
limit, but rather if it is a good control interface achieving both speed
of adjustment and fine-grained control.
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