Flicker algorithm help

On 22/01/2006 the venerable Wim Lewis etched in runes:

> In article <43ce7a19$0$823$4c56ba96@master.news.zetnet.net>,
> John B <spamj_baraclough@blockerzetnet.co.uk> wrote:
> > I am just starting a small design for amateur theatre group. They want
> > me to build a camp-fire simulator.
> > 
> [...]
> > 
> > Does anyone out there have a good algorithm to simulate the flickering
> > of a camp-fire, or will a simple pseudo-random sequence be sufficient?
> 
> Here's an article with some info on simulating candle flicker.
>    http://instruct1.cit.cornell.edu/courses/eceprojectsland/STUDENTPROJ/2001to2002/pc59/
> 
> The basic answer is a pseudo-random sequence with a 1-pole low pass
> filter at some lowish frequency.
> 
> That URL's from my bookmarks, but I think I found it by looking through some
> of the same websites people are mentioning elsewhere in this thread :-)

Thanks Wim. That looks really useful. Code is in C too so conversion to AVR should be a breeze.

-- 
John B