[sdiy] preferred noise source circuits

[Seb Francis]

aerogramma wrote:
>  while we're on the subject of noise sources...
>
> can anyone reccomend a simple, low part and 9v operated noise circuit?
>
> pink or white wouldn't matter at this moment
>

Um, I think this has been mentioned already.  You can't get simpler than 
a single microcontroller IC.  A resistor divider, or more efficiently a 
small voltage regulator, would be needed to run off 9v though.

Here's an example:
http://www.electricdruid.net/index.php?page=projects.noisegen

The accompanying circuit show how to get pink and other noise by 
filtering.  I wouldn't recommend this approach myself - better to do it 
in software and have pink, etc. directly out of other pins of the 
microcontroller.

There must be some code already written somewhere that does this ... ?

Seb