[sdiy] Digital Noise, FYI

[David G. Dixon]

> For those interested in the digital noise-making I referred to in the
> eVilBay thread, current design is:
> 
> 555 -> CPLD -> 10-bit parallel load DAC
> 
> ...where the CPLD is set up to be a 10-bit version of that described in
> Don Lancaster's TTL Cookbook, pages 277 through 281 ("The Pseudo-Random
> Sequencer.")
> 
> Settings for "proper" noise and "weird Space Invaders" noise by changing
> the 555 frequency :-)

That's an awesome circuit, from an awesome book.  It's high on my to-do list
as well.