Korg Poly800/EX800 Users

On Samstag, 7. März 2009, Alec Jahn wrote:
> Would it be possible to create a simple circuit that would control
> the up/down buttons by a knob?  I just have this rough idea of one
> of those infinite "pots" hooked up to an IC that would send out a
> signal replicating the button presses?

Yes, quite certainly.  There is a diagram(*) of the signals put out by 
the common incremental encoder types.  As long as the button poll rate 
is not too low and if the de-bouncing does not ignore narrow pulses, 
you could directly fabricate up and down signals with some logic.  If 
either of these conditions is not met, you would need to do some pulse 
conditioning, making them longer or spaced apart or both.

(*) http://www.ucapps.de/mios/mios_encoder_modes.gif


Achim.
-- 
+<[Q+ Matrix-12 WAVE#46+305 Neuron microQkb Andromeda XTk]>+

SD adaptations for Waldorf Q V3.00R3 and Q+ V3.54R2:
http://Synth.Stromeko.net/Downloads.html#WaldorfSDada