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CV without predictability...

2003-10-27 by osthelder

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!

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