RC Double Scroll Chaotic Oscillator

nice!

MΣ TΩΩ!

'the way God intended' lol nice!

Great!

Still not chaotic. It has certain predictability, although you have to include a lot of factors. In order for it to have a completely erratic (chaotic) behavior there are a few conditions that must be met. A negative resistance device, a nonlinear device like a diode, and at least 3 reactive components (LC). You got one, maybe two of these requirements met.

Looks like someone has their very own private definition of the word chaotic. Interesting, but not particularly helpful when having conversations withe the rest of humanity. I'd suggest educating yourself: unpredictable != Chaotic. Chaos has to do with the fractal dimension of the phase space trajectory of the system being larger than 1. Start with Googling "Lyapunov exponents".

As for the negative resistance part. Its actually in there. Its just you didn't see it.

As for non-linear ... So in your book, a BJT is a linear device ? lol.

1st of all, let me give you a little hint. Everything in EC is absolutely predictable. It's just a computational software with a graph. Since you can't calculate the uncalculable, EC wouldn't have worked with a real chaotic Oscillator. At best it's semi chaotic, but that's like saying half an infinity. So no it's completely predictable. Yes you got the negative resistance and the nonlinear device I noticed. What about the LC tank circuit? First of all there are a few chua circuit examples here in EC. Find them and play them a few times. Each time you'll get a different starting point and a different trajectory. With your circuit it always starts the same way. So yeah maybe it'll follow some weird patterns, but every time you start it it's gonna follow the same path, while a true chaotic Oscillator will always differ in the starting point

I see you are the local expert when it comes to stating the blatantly obvioys. A) obviously a simulator will always produce the same result, independent of the circuit. B) You're still not understanding that Chaotic and Unpredictable are two *very* different thing. C) Thanks for the Chua pointers, I published one of them (the one w/o OpAmps, look it up , captain obvious). D) I don't know where you got the fixation that you need inductances to get chaos. Short answer : you don't. But if you need to cure that specific ailment of yours, one way is to go look up half of the published Chua circuits, where the inductance has been replaced by two OpAmps (a gyrator)

Oh, and if you need more convincing that this circuit is actually chaotic go breadboard it instead of wasting your time on intellectual masturbation about what a simulator can and cannot do (and BTW, you're dead wrong about the other chatic circuits on EC: they will always simulate exactly the same unless EC somehow injects H/W entropy from the phone's /dev/random. Not that it matters. Again, to make sure it sticks, chaotic != unpredictable.

I don't know man this looks like a pretty weird phase shift Oscillator with some kind of AGC to me. Typically it somewhat fits the criteria although typically the third energy storage device is a reactive component opposite to the other two (an inductor, or a gyrator as you said). I'll breadboard it when i have the time and I'll let you know if it works chaotically. I've been meaning to try something like that out but i haven't had the time lately.

Here's what it does in the real world: https://youtu.be/Bv83CDq2gMw

As you can see, the phase space trajectory is dense in phase space, which is the definition of chaos.

And @thebugger here's the article if you want to understand why it is chaotic : http://www.chaotic-circuits.com/wp-content/uploads/2016/06/Simple-Two-Transistor-Single-Supply-RC-Chaotic-Oscillator.pdf

@emogenet nice little circuit and it looks chaotic! And any engineer should check this carefully, cuz this circuit demonstrates nicely the limits of engineering! An AGC for example can be easily react chaotic as you probably do not want! Or PID regulator might behave chaotic! LC are not a a must as components, just three C's as energy storing components are enough. Thanx @emogenet for this cute circuit.

Yeah if the article says so, it probably is, but I just see a lot of constants in this circuit and it's got me thinking. You actually do have all the criteria met, but the response of an AGC is quite predictable. Maybe it's unpredictable how much it'll sap from the one of the RC chains when activated, and exactly how it's gonna affect the circuit. Hm, it's pretty interesting. Gonna breadboard it, but my oscilloscope doesn't have an XY mode, so i don't really know if I'm gonna have any results.

I layed it out on a breadboard but it doesn't seem to work. That's why i hate oscillators, they are hard to get going in reality