[sdiy] Knobs with LEDs

[karl dalen]

Alps makes complete pot-led, pot-encoder modules, Conrad PRO have several in their catalog.I wouldn't be sup-riced if Meug Pahatty uses a different brand most likely there are more then Alps.

KD

--- Den lör 2011-04-02 skrev Tom Wiltshire <tom at electricdruid.net>:
 
> On 2 Apr 2011, at 11:07, Graham Atkins wrote:
> 
> > On 2 Apr 2011, at 06:42, Tristan wrote:
> > 
> >> I guess the intent is only to provide indication
> over the approximately 300 degree range of a rotary
> >> potentiometer.
> > 
> > But it states it is for rotary encoders.....By nature
> a 360 deg device.
> 
> That's true, Graham, but often rotary encoders are used to
> alter a parameter from min to max, and that implies some end
> points, just like a pot. They might be endless, but they're
> mostly used to *replace* a pot, like on the Nord synths, in
> which case you've got something that acts pretty much like a
> pot, but has programmability and instant indication of
> stored positions.
> The problems are more to do with the limited resolution of
> both the encoders (often 24 positions) and LEDs (often 15 or
> 31 LEDs) in my opinion. The limited display resolution makes
> an associated LCD display more or less essential for
> detailed editing, and the limited encoder resolution makes
> it hard to do a smooth filter sweep (for example) in a
> single movement because you have to give the encoder several
> full rotations.
> I also agree with Paul that if you're going to design a
> board for such a gizmo, it'd have been sensible to (a) put
> the encoder on the board and (b) add enough intelligence for
> the board to deal with the encoder and display so that the
> host system doesn't have to.
> 
> T.
> 
> 
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