corner cv's with a joystick

[ambi-J]

normally the use of a joystick in an analog synth is restricted to 2 cv's: a pot for the horizontal and a pot for the vertical axis.
here is an 'analog' calculator with opamps witch calculates the 4corner cv's of it.
each axis has to work between the same positive and negative voltages, with 0 volt in the middle of the joystick.
with a set of opamp inverters and summers we can now calculate the corner cv's.
where is it good for? : driving 4 vca's you can use it as a morphing controller or for quadrophonic effects.

I have implemented it on my 'muze' modular an started to draw a pcb for it.
If there are enough people interested, I will finish the pcb drawing an publish it (eventually sell pcb's)

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[ambi-J]

the schematic is in dutch: sorry for that.
translations:
LB: left up
RB: right up
LO: left down
RO: right down
optelschakeling: summer

on the left of the drawing you will see two pots between + and -: it's a stereo pot witch give the range.
the H and the V pots are actually the joystick.

[neandrewthal]

Very cool. I'm definitely interested.

[Danno Gee Ray]

I'm interested.

[6079smith]

Yeah, pretty cool idea. I finished (what I thought was) a fairly comprehensive joystick controller recently; now I've got a whole lot of other things to think about... nice one.

[macumbista]

Also interested. Ditto + bump!

[macumbista]

I'm assuming all the resistors in the inverters or summers are equal, and matched to the values of the joysticks, right?

[kenl666]

I also would be interested in a PCB or two!