Blue Box even better

[Jules Ryckebusch]

I'll draw it up (have circuit CAD program now) and post it Gimmmie a couple days.

Jules

Peter Snow wrote:

> Hi Jules,
>
> Is that circuit available anywhere?
> PWM on a guitar - must sound really cool!
>
> Cheers,
>
> Peter
>
> Jules Ryckebusch wrote:
> >
> > > Hi All. I built in the early 80's a very similar (but better) device. It
> > > uses a high gain pre that runs into a comaparator, cleaning up the wave
> > > form to a true square wave. Then I ran it into a 555 timer set up as a
> > > monostable multivibrator with an adjustable pulse width from a resistance
> > > pedal. It turns a guitar into a PWM sounding synth lead. Then you have
> > > the option of increasing pulse width beyond duty cycle of the frequency
> > > of the guitar note. and viola, instant octave shift. It took a lot of
> > > finnese to play well but sounded neat.
> >
> > Jules