You can feed AC 60Hz to this pin...
	Or HP filtered 60Hz...

On 24 Sep 2006 at 20:10, John Chung wrote:

> I have and idea. A wild one. Get a reading off a
> floating pin using the ADC. Use the value as a seed.
> And reseed the generator after certain iteration.
> Sound like an idea. Floating pins do not provide a
> stable value and their values are within a limited
> range. But when you keep on reseeding a value things
> get pretty wild. 
> 
> John
> 
> --- Tony Smith <ajsmith@rivernet.com.au> wrote:
> 
> > > > Look carefully, and I think you'll figure out
> > that the functions on 
> > > > the page referenced ARE implementations of
> > Galois LFSRs.
> > > > Particularly clever implementations thereof that
> > don't look 
> > > like they 
> > > > contain nearly enough instructions do so ...
> > > 
> > > The page also contains a few others that look a
> > bit dodgy. I 
> > > was mainly aiming at the one at the top, that
> > claims to 
> > > rotate with carry and to output that as random
> > (AFAICT).
> > 
> > 
> > The problem with the rotate & carry routines is they
> > repeat, eg after 65k
> > operations (16 bit register).  Not that you'd notice
> > in most cases.
> > 
> > Also think about how to seed the routine, a way to
> > cause the routine to jump
> > to a different spot in the sequence.  In other
> > words, start the register at
> > a number, not 0.  Like in old BASIC games, where
> > RANDOMIZE TIMER was used to
> > seed the routine.  (And it always gave the same
> > sequence too for the same
> > seed.)
> > 
> > A typical method is that the routine always runs,
> > and when the user presses
> > a button it outputs the current value in the
> > sequence.  Ok for a dice
> > rolling app, not so good for something that doesn't
> > have any inputs.
> > 
> > Tony
> > 
> > -- 
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> 
> 
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