MOTM

Wow! Normal and Bradley together! Who'd a thunk it! 

But remember, several modules can't have normalled inputs do to using the NC 
terminal connecting to ground on some inputs -- this got me into trouble with 
the 410 while using banana jacks.

Joysticks:
Hey! You want a joystick that doesn't return to the center (origin)? Open it 
up and remove the springs! Better yet! Try removing the spring from one axis 
and leaving the other one on.

In a message dated 2/21/2000 10:26:35 PM, synth1@... writes:

>If I can find a big enough die punch, I was thinking to make a module using
>the IBM DB-15 connector, so any old PC joystick would just plug right in.
>That way,
>you can have a cable away from the panel.


I've been hoping you'd do something like this! I really like this idea!

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.

I happened to be inside of a couple of Apple II joysticks yesterday, as luck 
would have it. While these are easily findable (via surplus) they need to be 
hacked in order to be useful. They do use a DB-9, but I'd prefer more pins, a 
DB-15 would be good! They have 150K pots and three buttons (one on the stick, 
two on the sides). They also have mechanical offset adjustments (??? -- the 
pot moves as you adjust them), and switches to disconnect the spring return 
for each axis (kick ass!).

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).
9 Jacks (I know! Do it like the 300) -- GATE A, GATE B, GATE C, X left INPUT, 
Y bottom INPUT, X right INPUT, Y top INPUT, X OUT, Y OUT
DB-15 connector (top left of panel).
Mode switch -- 3 position to calibrate the joystick offsets.

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.