[sdiy] Pseudo Random Noise Generator in an AVR?

[Jim Patchell]

I am trying to elimnate parts in my current project.  I have every thing 
on the board, except the analog noise generator (you know, reversed 
biased e-b junction.  Gaining enough realestate may not be possible, and 
I don't want to add any more square inches.  So, I was thinking, why not 
move the noise generator into the ATmega that is also on the board.  
Making a 32 bit linear feedback shift register in the firmware should 
not be a problem.  Running it fast enough might be  I would want to run 
it at a minimum of 40K shifts per second.  Not even sure if that is fast 
enough.

Anybody else every try something like this, and how did it work. 
Otherwise, I am going to have to break out the old STK500/501 and write 
some code. ;^)

-Jim