[sdiy] single 9 volt battery white noise source

[Dave Leith]

Re pink :) ?

The noise is driving either the distortion or FM input of the XR2206
VCO so probably something very simple/passive and not really pink 8-).

On 7/17/09, aerogramma <aerogramma at gmail.com> wrote:
> great!
>
>  it's actually a very good idea to add another stage of gain, i'll do it
>
>  i've filtered it too but it i used a variable filter based ona  LM741 (9v
> too)
>
>  how will go go pink :) ?
>
>  cheers!
>
>  aero
>
>
>  On Jul 18, 2009, at 5:13 AM, Dave Leith wrote:
>
>
> > Hey it works great! I added one more stage of gain - same values as
> > 2nd transistor plus  a 2.2 M resistor to +.  Lot's of output- sounds
> > good. I maybe will filter it more towards pink.
> >
> > On 7/17/09, aerogramma <aerogramma at gmail.com> wrote:
> >
> > >  Hi dave,
> > >
> > > i'm on a 9v trip too..
> > >
> > > I've just built this noise source and it works like a charm
> > >
> > >
> > > http://aeeprojects.blogspot.com/
> > >
> > > has to be said that i've noticed a lot of fluctuation in the quality of
> the
> > > white nosie generated, depending on the battery real charge  (8.5v, 7v,
> 9v
> > > etc)
> > >
> > >
> > > if you build it let me know how it works for you :)
> > >
> > > best
> > >
> > >
> > > aero
> > >
> > >
> > >
> > > On Jul 16, 2009, at 5:36 AM, Dave Leith wrote:
> > >
> > > Does anyone have any recommendations of a schematic for a white noise
> > > source that will run off a single 9 volt battery?
> > >
> > > Thanks dave
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> > >
> > >
> >
>
>