[sdiy] 4 pot analog joystick

[Tom Wiltshire]

I agree with Amos about using the two pots independently. Using one  
back to front is also interesting.

I'm reminded of the way the Sequential Pro-One uses the modulation  
wheel (a pot with a wheel rather than one acis of a joystick, but  
it's the same thing). You can route a modulation signal either direct  
or via the wheel control.
With two pots on the joystick, you'd be able to have two independent  
modulation routes. For example, you could have LFO modulation of  
Oscillator pulsewidth on one pot, and envelope modulation of the  
filter on the other. And then you've got two more routes on the other  
axis! Awesome! ;)
A switch so that one of the pots in each axis can be reversed is the  
icing on the cake.

Enjoy!
T.



On 6 Apr 2009, at 19:59, Scott wrote:

> Ah, good point about the pots being opposite.  That does open a lot  
> of new possibilities.  And, each pot will have its own little  
> controller to set the range and offset.
> Ok, thanks.
> Now the only problem is that I don't have a couple of clones of  
> myself to actually build all the stuff I have on my workbench.
>
>
> ________________________________________
> From: Amos [mailto:controlvoltage at gmail.com]
> Sent: Monday, April 06, 2009 1:37 PM
> To: Scott
> Cc: synth-diy at dropmix.xs4all.nl
> Subject: Re: [sdiy] 4 pot analog joystick
>
> Seems to me like with two opposing pots on the same axis, whenever  
> one is full-clockwise, the other would be fully anti-clockwise.   
> Plus they could have unrelated signals (so each axis functions as a  
> dual pot).  So, could be useful for quadraphonic panning, for  
> instance... or other applications where ganged dual pots are useful.
> On Mon, Apr 6, 2009 at 2:27 PM, Scott <Scott at scottwick.com> wrote:
> I just got back from the local surplus store w/ a few cool things.
>
> One is a nice analog joystick w/ 4 pots.  I already have a few  
> joysticks w/ 2 pots.
> I'm having trouble coming up w/ the benefit of 4 pots.  Both pots  
> on each axis are always on the same setting.  Should I bother  
> wiring them up?  (basically, to me it seems like two outputs from  
> one pot would be the same thing)
>
> One more question.  I found some awesome 10 turn pots, w/ big knobs  
> that have an indicator for each revolution of the knob.  (so you  
> know which of the 10 revolutions you are on)  But, they are only  
> 200 ohm.  Are those of use for controlling the pitch of a VCO?   
> (200 ohms is far from 100k which is what my VCO tune pots are now)
>
> thanks!
>
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