Simulation of kicad capacitive active emg eeg electrode?
I see the basic rc example and 555 example but don’t know if I can apply it to the circuit I see in a science journal article.
KiCad can simulate a capacitor.
What else is special on your capacitive electrode?
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Here you can see some searches where the human body effects a capacitive emg sensor and simulation may show me if something is off.
The trick is to generate a suitable equivalent circuit for the human body interface.
If this resulting circuit comprises of passive device like R, L, C, diodes and active devices (semiconductors), then KiCAD/ngspice can simulate this interface. Some of the pictures you have shown point into this direction.
The choice is yours! You will have to define/select such a circuit, draw it in KiCAD/Eeschema, and off you go.
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The interface itself seems to be just a bunch of passives, and easy to simulate.
The biggest problem with simulating with KiCad usually is to find subcircuits that are good representations for the opamps (and other active components) you want to use.
Another problem is the 900+ page manual of ngspice, which I do not know how to handle well, but I have to admit I did not try very hard. A good beginners introduction to spice would be more at my level at the moment.
You might have a look at http://ngspice.sourceforge.net/tutorials.html for links to various tutorials and videos. And there are more on the web (please let me know if you find something in addition).
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yes there is a kicad tutorial there a good cannon.