Wiardgroup

Hi Dustin
      I've never disassembled my production wogglebugs for a component
by component comparison  but I was in close contact with Grant during
the development of the circuit in the summer of 2001.  To my
knowledge, there were six prototypes. #5 was the production model 
***.  I've built several #3's  and modified them to my taste.
Schematics of my favorite mods  are in the files section of this group
labelled: WBug3Mods-DrMabuce.jpg.
     To address your question more directly. The core of the wogglebug
is the 4046-pair , the 398 sample-hold and the vactrol.VC1 -  the
evolution of the woggle bug circuit after #3 tended to be progressive
refinements of  the voltage controlled clock (U5 & VC2)  that
triggered the 398 and the circuit that controlled the LED portion of
the vactrol, VC1.
     In the #3 circuit VC1 and a second vactro.l, VC2 are controlled,
together, in series by a single CV. To my (deranged) ear , the option
of controlling VC1 and the clock-rate VC2 separately yields a lot more
interest . 
     Also I imagine that Grant would have been inclined to improve the
transistor-based circuit (Q1) that controlled VC1--- probably with a
op-amp CV buffer.

I realize this response id far from definitive, but on the whole I
believe that Grant published the essence of the wogglebug  in the #3
schematic – an almost insanely generous act IMHO.

melt some solder and try it!
-doc

***
the #6 schematic included an ill-fated implementation of the MF-10
one-chip programmable filter that was too outrageously noisy for a
commercial design – I added one to my production board just to find out!
`a bridge too far!'



--- In wiardgroup@yahoogroups.com, "ed.j.wise" <dustin.sedlacek@g...>
wrote:
> 
> or anyone else that knows how is the wogglebug#3 schematic that i 
> have found  diffrent from the production model wogglebug that is sold 
> on the web site?