[sdiy] dave smith *instruments*

[Chromatest J. Pantsmaker]

At the last radio station I worked at the mixing consoles had this
type of rotary encoder for the volume knobs.  They worked really well
for that!


On Mon, Feb 1, 2010 at 2:36 PM, Dave Manley <dlmanley at sonic.net> wrote:
> One alternative I've seen on a Boss SE-70 uses an encoder with a built-in
> momentary push switch.  Counts by 1 with the switch out, by 10 with the
> switch in.  Very usable encoder interface, and since there's only one
> encoder on the box, not a big expense.  It's good for data entry, but not as
> a performance control.  I haven't priced them, so no idea how much of an
> adder there is.
>
> -Dave
>
>
> Tom Wiltshire wrote:
>>
>> There's one other issue with encoders, which is that (detents or not) it
>> is very difficult to get enough resolution out of the movement you can do in
>> one turn. Whereas with a (decent quality) pot I can get somewhere between 8
>> and 10-bit resolution (e.g. 250-1000 separate readings) fairly reliably, I
>> can't get any like such a high number from 300 degrees of travel on a rotary
>> encoder. Even if I do it the hard way and use every single phase transition
>> to give me 4 increments per detent - typical encoder has 20-30 detents,
>> times four equals around 100 positions. And that's in 360 degrees.
>
>
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-Chromatest J. Pantsmaker
http://www.chromatest.net