Electronics > Beginners
Four questions about (Super) capacitors in series
helius:
There's considerable risk getting your science from university press releases (or from Scientific American, a respectable journal for 100 years, but more and more a Popular Science clone). fMRI is a field with huge methodological problems; a study using common (for fMRI) statistical methods identified "neural pathways" activated in a dead salmon.
havewattwilltravel:
It doesn't matter if the resistance is between the middle capacitor and the others, or all in one place, because it's the total change in the electrostatic potential of the entire circuit that evokes the effects, right?
And my point: this is how I learn, I have to rediscover. In my case, it's been more than 40 years since I looked at any of this. Apologies if it strains your patience.
IanB:
You are still using strange, complicated terms to create a word salad. This is what strains my patience. Why not use simple words like voltage and current?
JS:
I would mention something that's not exactly on topic but I think it should be mentioned here...
For a reliability point of view, is usually safer to put several caps in parallel than several caps in series, also, as with series caps you need balancing resistors the leakage is a problem, through the resistors this is, in parallel caps you don't need that.
Now, you need several caps to fit in some space X amount of capacitance for X voltage, so in the same package you can get higher voltage lower capacitance and end with a similar result, with all the caps rated for the desired voltage and get to the desired capacitance.
I do know it could be easier or cheaper to get one or the other, let's go for 1F 5V and 10mF 50V caps, let's go to mouser, cheapest ones, for 10, $2.85 for the 10mF 50V, $3.55 1F 5V... YMMV depending on the ratings. I also didn't compared sizes, this 10mF 50V ones are likely bigger than the 1F 5V
JS
havewattwilltravel:
You'd expect that with fMRI since the only thing it shows is where the oxygen is.
Are you suggesting learning is possible without physical changes in the brain? Or that brain development is uniform and not environmentally directed on a neuron basis?
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