Homebrew PCBs

Ok, I have a question about this page:
http://www.instructables.com/ex/i/532834782C781029BC6B001143E7E506/

I've never done this, been mainly using microprocessors so far.

How does it 'start'?  Which LED blinks first?  Is it a sort of lottery,
depending on which capacitor gets charged first?  I figure we are assuming
the capacitors won't be perfectly identical (due to tolerance range).

Both 'sides' of the circuit are identical, so I would assume matched
blinking rates (50% per side).  It's the 'first step' that always bothered
me with these kind of circuits, what happened RIGHT after you pushed ON?

The flip-flop stuff is another thing that I have serious trouble
understanding.

Robert
:)



> -----Message d'origine-----
> De : Homebrew_PCBs@yahoogroups.com 
> [mailto:Homebrew_PCBs@yahoogroups.com] De la part de Bill Westfield
> Envoyé : mai 4 2006 18:37
> À : Homebrew_PCBs@yahoogroups.com
> Objet : [Homebrew_PCBs] Design rules for hobbyist PCBs...
> 
> 
> FWIW, I've published some advice/opinions and tutorial 
> information on how to design your PCBs so that they're more 
> easilly fabricated in a homebrew/hobbyist context.  The 
> tutorial is based on EAGLE, but the principles should apply 
> to other CAD packages as well.
> 
> http://www.instructables.com/ex/i/E8C98D522C771029BC6B001143E7E506/
> 
> BillW
>