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Frijitz makes MAKE
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mandrigora



Joined: Jun 04, 2007
Posts: 51
Location: maryland

PostPosted: Thu Dec 27, 2007 2:30 am    Post subject: Frijitz makes MAKE Reply with quote  Mark this post and the followings unread

http://blog.makezine.com/archive/diy_projects/


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frijitz



Joined: May 04, 2007
Posts: 1710
Location: NM USA
Audio files: 54

PostPosted: Thu Dec 27, 2007 6:37 am    Post subject: Re: Frijitz makes MAKE Reply with quote  Mark this post and the followings unread

mandrigora wrote:
http://blog.makezine.com/archive/diy_projects/
Wow, thanks for pointing that out. I probably never would have seen it! (Too bad the figures don't actually go together -- I hope nobody thinks they can get the quadruple scroll from the EZChaos circuit. Laughing )

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Ian
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bugfight



Joined: Aug 02, 2007
Posts: 188
Location: Arlington, TX USA

PostPosted: Thu Dec 27, 2007 1:46 pm    Post subject: Re: Frijitz makes MAKE Reply with quote  Mark this post and the followings unread

frijitz wrote:
mandrigora wrote:
http://blog.makezine.com/archive/diy_projects/
Wow, thanks for pointing that out. I probably never would have seen it! (Too bad the figures don't actually go together -- I hope nobody thinks they can get the quadruple scroll from the EZChaos circuit. Laughing )

Very Happy

Ian


hey Ian,
i came across your site a few weeks ago and read it with interest. great ideas with excellent explanations. so what exactly were the "two step-function nonlinearities"? (if you don't mind my asking)
on a similar note, have you considered making a sort of chaos experimenter pcb with say 4 or 6 of your general purpose blocks, 6 pots, i/o, and a pad-per-hole section for adding other circuits? if you like, i could mock one up right quick...
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frijitz



Joined: May 04, 2007
Posts: 1710
Location: NM USA
Audio files: 54

PostPosted: Thu Dec 27, 2007 3:08 pm    Post subject: Re: Frijitz makes MAKE Reply with quote  Mark this post and the followings unread

bugfight wrote:
i came across your site a few weeks ago and read it with interest. great ideas with excellent explanations. so what exactly were the "two step-function nonlinearities"? (if you don't mind my asking)
Hi bug -- Thanks for your interest! The "two step-function nonlinearities" are just two comparator circuits, one in the main signal loop and one fed back through a second path. These are part of what I call My "Sprott Box", which is a switchable system that embodies several VC versions of JC Sprott's circuits. I added to these a second nonlinear feedback path. I haven't put this whole system up on my site, because it is quite complex. It has 25 switches and pots to set the four modes of the system and to switch in the various nonlinear circuits. In addition, it has special circuits to keep the system from running off to the rails.
Quote:
on a similar note, have you considered making a sort of chaos experimenter pcb with say 4 or 6 of your general purpose blocks, 6 pots, i/o, and a pad-per-hole section for adding other circuits? if you like, i could mock one up right quick...
I built something like that at one point for developing different systems. It ended up being committed to my second box, which is the 5-stage cyclic system. I brought out the various I/O points to the panel so that various loops and nonlinearities can be patched up.

If you would like to build up an experimenter's board, I would certainly encourage you to do so. Just one thing to keep in mind -- you can't just hook up some arbitrary integrators and nonlinearities and expect to get useful results. Chaos only occurs under special conditions. That's why my circuits are based on systems that are already understood. Of course, there are many other chaotic systems you could play with.

I made PCBs for two simple systems that are generally stable and produce a wide range of attractors. Several people (maybe 5%) have built these circuits and given me their feedback. I don't know how many people would really be interested in a more complicated experimental system. But if you want to try somethings along this line, I'd be happy to cheer you on.

Very Happy

Ian
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