ComputerVoltageSources

Moe -

The AUX can be the Gate Out of course, but I must have one input &
output for note quantization  :)

There must be some way to take *one* PSIM output and turn that into
addresses 0~15.

On the MiniWave, the Wave Selection input voltage is somehow converted
into binary, which then lights up the 4 leds;  that's what I'm thinking
about.   So 0~0.5v = 0000, 0.6~1.0v=0001, 1.1v~1.5v=0010, etc.   The
PSIM program could specify the sequencer step 1~16 by outputting   =
0.25v*requiredstepnumber.

I don't yet understand how 16 skip switches can all communicate with the
PSIM.  If there is a way to do that using just one PSIM input?  With
another multiplexer you could scan across all the switches between
steps, but I don't think the DAC could be scanned 16 times and still be
fast enough at even moderate tempos.  (?)

I guess you could (assuming the switches were multiplexed) 
   #1) choose which step to go to next
   #2) look at the status of that switch's SKIP switch
   #3) if SKIP=on then go back to step #1
   #4) go ahead and fire up that step
But this could result in noticable delays if several SKIPs were ON.

If you dedicated two PSIM inputs to 16 on/off switches, you'd have 20
bits to work with, yes?  Would that make it possible?

I feel like the greatest hardware step sequencer is just a couple minor
problems away...

Andrew


>>> "Dave Bradley" <mate.stubb@...> 12/18/06 12:22 PM >>>
Andrew,

If the 4 psim outputs were set up to be a binary address, you could have
complete specification of any arbitrary number between 0 and 15.

Then set up two inputs as you described, one for control of clock pulse
advancement for rhythm, and one for control of direction/next stage
select
mode.

Set up a third input as a skip input.

Aux would be an output that fires a pulse every time the state changes
for
envelopes. The width could be controlled up to 100% by the 4th input.

Now you need a pot matrix with binary inputs, kind of like what I was
trying
to do with SuperMoe:

http://www.hotrodmotm.com/images/CV_Generator_8x4new.jpg

This module can do 8x4 steps, 16x2 steps, or 32x1 steps. Since you only
have
4 psim outputs for address, you could do 2 rows of 16 steps worth of
control, randomly accessible from the psim.

Moe

On 12/18/06, Andrew Scheidler <xpandrew@...> wrote:
>
> Dave -
>
> Can the existing PSIM-1 have four more inputs added?  Outputs too?
>
> Are there schematics or instructions for this somewhere?  I have a
> soldering station and I'm not afraid to use it  :)
>
> Andrew
>
> >>> "djbrow54" <davebr@...> 12/16/06 11:50 AM >>>
> It's been designed so the 8 analog inputs can be multiplexed (with no
>
>
>
>
>
> Yahoo! Groups Links
>
>
>
>


-- 
Dave Bradley


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