MOTM

> From: jwbarlow@...
> Wow! Normal and Bradley together! Who'd a thunk it! 

I think normal and Barlow together would be more amazing <grin>

> In a message dated 2/21/2000 11:22:33 PM, jlarryh@... writes:
> >More joystick ramblings.
> 
> >And, while I was working on my schematic, I finally decided what I am
going
> >to do with that dang button on top.  It will have two functions.
> 
> >mode 1:  When the button is pressed.  Voltage on all 4 outputs goes to
> >zero.  I think I have this figured out.  To me this would make it very
> >easy
> >to adjust the "trim" or "offset" to the exact zero point by ear quickly.
> 
> >mode 2: Button generates a gate.
> 
> I like mode 1 (it didn't occur to me until I gave it some thought how
useful 
> this might be -- though I thought about having a three position switch to

> select CALIBRATE X  OFF CALIBRATE Y -- Larry, don't you mean two outputs,
or 
> am I missing something?), but it might make things a bit difficult to
figure 
> out how to do it.

John, my joystick will have 4 voltages out at the same time.  Instead of X
and Y out using a polarity switch, I will put in unity gain inverters and
have X+, X-, Y+, and Y- outs all at the same time.

I have it drawn up.  I don't think it will be hard.  However, it isn't
built yet. So, we will see.

> So here's what I thought about today: 
> 2U panel
> Four pots -- X OFFSET, Y OFFSET, X SCALE, Y SCALE
> (scale pots are reversing attenuators, naturally).

The 4 outs eliminates the need for reversing attenuators.

> I've been thinking of having separate inputs to allow crossfading from
two 
> sources (CV or audio). I finally realized this was possible with some 
> slightly more sophisticated switching jacks than Paul typically uses.
Very 
> difficult to describe, but with nothing plugged in each joystick pot
would 
> have +V on one side, -V on the other. Plugging in a jack to the right (or

> top) input both disconnects the +V (while connecting the input) and 
> disconnects the -V (while connecting ground, or the left (or bottom)
input if 
> something is plugged in to that input).
> 
> Any thoughts?
> 
> Larry, I didn't follow the PAiA CV input you mentioned.
> 
> John B.

John, This would be similar to what you are describing.  However, it would
be just a X IN and Y IN.  Plugging in the external CVs or audio would
disconnect the joystick and give you two reversing attenuators with
controls for gain and offset.

Larry