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got osc with resistor and capacitor working in true falstad sim!!!

dragon

Oct 31, 2022
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If this is working, i should be able to go wire it up! told u I would get it!

 

Harald Kapp

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Nov 17, 2011
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Whre s there an oscillation? I can't see one and, assuming the voltage source is DC, there will be none.
Could it be that what you perceive as oscillation is simply aliasing (cf. the wagon-wheel effect)?
But go ahead and build this, see for yourself.

By the way, you will be very, very, very hard pressed to find a 1 n resistor in reality.
1669546255725.png
Your wiring will exceed that value easily.
 

dragon

Oct 31, 2022
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Yeh its the one nano resistors that screw around with the program I think its because it makes the derivative numbers too big in the physics model per frame.

I was only mucking around posting this, But I had alot of fun making things just today and yesterday, I never really used in much before (Falstad), just touched on it briefly, went back this time a bit more full on, and I worked out I like it alot! and its very realistic, its very similar to just chucking wires together but alot quicker and easier.

I worked out tonnes of new strategy little odds and ends, cant really get what I want to work, but I work out little bits instead.

Its so easy to miss things, its good to sim your ideas around a bit just so you can get ahold of all the bits and pieces and angles ur missing, Im off to the electronics shop tomorrow probably get bags of components then off I go again.
 

Martaine2005

May 12, 2015
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Well done. I like your enthusiasm.
simulators are great, I’m learning (slowly) LTspice when I get spare time. But real world components, PCB traces, breadboard and wires will also affect tolerances, resistance, inductance etc.
As Harald pointed out, not sure what a 1 nano Ohm resistor is good for?.

Martin
 

dragon

Oct 31, 2022
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Falstad is so much more fun than those old clunky sims, Im not into em, I need the new stuff, same with engineering cadding, I cant stand 3dsmax or even really 3dcoat or zbrush these days! I need something extra fancy like solid worx or some of the other new ones, they look really good.

Im not really trusting Falstad all that much for realism, Im just using it to get more design ideas. Its really good for that.

1 nano-ohm-> Its as good as a short circuit.
 

John Canon

Jun 1, 2022
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Speaking of sims, I once repaired a "touch on/touch off" actuator for a bedside lamp. It was a bad triac.

How would you test a sim for that simple circuit? Just curious.
 

dragon

Oct 31, 2022
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heres this funny circuit Im working on->


About your question, I'm not in knowing of what triacs are, but if u used an electrostatic touch switch, have a current that taps through the mechanical capacitor plate, with a frequency of ac, put that through a diode bridge, and then into a transistor base, then u'r going to need a flip flop. :) I guess you already know and just testing, could get a little sizeable.
 
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