Archive of the former Yahoo!Groups mailing list: MOTM

previous by date index next by date
  topic list  

Subject: CV without predictability...

From: "osthelder" <osthelder@...>
Date: 2003-10-27

Hi all!

After spending quite a few hours playing with various (psuedo)random
control voltage generator schemes, it seems I've hit on something
useful. Well, useful for my system. At any rate, I was inspired by
Grant Richter's Standard Wogglebug #3. My design also uses 2 PLL's
in a sort of "chaos" patch, but there is no "stepped" and "smooth"
outputs. Instead, the circuit provides a wildly chaotic output, a
continously variable rectangular wave output, and a random gate pulse
output.

Depending on the frequency settings of the onboard VC clock, and the
VCO's of the PLL's, the chaotic output ranges from zero volts DC to
the maximum frequency either PLL is allowed to produce. Chaos,
indeed!

The onboard VC clock has both AM and FM feedback from the PLL's.
This assures unpredictability. In fact, patching an external LFO
into the FM input allows to device output to follow some sort of
pattern. Otherwise, very little pattern can be detected.

I'm done with testing and have a PCB layout (hopefully) completed.
Tonight I should be able to etch the board. Whether or not that
actually happens depends on how wired my grandson is- last night was
trick-or-treating here and he's still pretty excited. A 4 1/2 year-
old isI still have to draw up a final layout of the schematic for my
engineering notebook (my research time counts for ongoing training
requirements at work), but when I do I'll make it available to anyone
interested. That'll be, what, three of you? Everyone else can
ignore this post, avoid eye contact and back away slowly-just like my
neighbors.

Thanks for reading this!

Chub-different, and built to stay that way!