Negative discharge effect

[ayeaye]

TinselKoala, i saw you made a video too https://www.youtube.com/watch?v=qUMb6e6QQIA&list=UUZFlznLV3IyePfbc2TfDetA , thank you, great video, great work This video helped to learn a lot of new about that circuit. And the presence of the effect is now confirmed, an effect is often considered valid only after repeated the first time by another person, so it's like a part of finding it. It is all now about how it is interpreted, and which of these interpretations is more correct.

Now maybe i would like to stick to my interpretation, forgive me, as this was the idea why i started it at the first place. So this can be taken as my interpretation, others have different interpretations of their own. But this is what i would like to say.

Notice these things. It picks the frequency out of the mains, right, some kind of induction. But this does not occur when the circuit is not in resonance. Also the voltage on the multimeter almost does not rise when the gate voltage is low, and there are no spikes in the coil. Even in spite that this induced mains voltage sometimes goes negative.

The ringing of the coil, 20 kHz, this is caused by the mosfet's output capacitance, the amplitude of that is very small, and this is likely as much there is leakage from the mosfet, this voltage is not much and not likely to cause the effect.

But the main thing is, there is almost no back-emf on the coil. And thus it can be no way explained how the capacitor can charge with the polarity how it does. The voltage on the capacitor is related to the voltage of the spikes, because these are the only things which can provide high enough voltage. So this is where comes my suggestion of negative discharge. It is about that a positive voltage spike in the coil, causes current to flow from the capacitor, and when there is no positive charge in the capacitor, it charges negatively. It may seem naive but, this is nothing bout the first thing i thought when i first saw the effect.

There are always many interferences, and if we say that when there are any of them present, then this must be the cause of the effect, then we can dismiss whatever effect. I also succeeded to get higher voltages, up to 2.6 volts, which is much higher than the amplitude of that mains induction, but i could not repeat it on the same frequency and duty cycle.

But one more thing which this inducing voltage by the mains may say. It says that there are things which interfere with the circuit. This may be another reason why the effect may occur on different frequency and duty cycle even when all the components remain the same. It may be enough that the frequency of your mains power changes slightly, and the effect is not on the same frequency any more.

[ayeaye]

Maybe i should explain more what i mean by negative discharge. For example when charging three capacitors in series, then the middle capacitor charges by negative discharge. Because the plates facing each other of two capacitors have zero charge, but after charging they have instead equal and opposite charges. And they take that charge from each other, like when taking positive charge, as a result the plate where they take that charge, would have a negative charge. So this is not charging, but negatively discharging.

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[TinselKoala]

Well, isn't it obvious that any two plates that are connected together (Plate B of Cap 1 is wired together with Plate A of Cap 2, etc) have the same charge?

At any rate I've been testing a few different diodes. Most interesting is when the "direct" setting -- no diode -- is used.

[ayeaye]

It's really great what you do, TinselKoala, and i'm thankful to you, but then with your experiments you create more questions than answers...

[TinselKoala]

It's really great what you do, TinselKoala, and i'm thankful to you, but then with your experiments you create more questions than answers...

I think that's the nicest thing anyone has said to me in a long time!