[sdiy] stupid cap question

[cheater cheater]

You mean alternating current :)

On 10/6/05, Antti Pitkämäki <anpitkam at hotmail.com> wrote:
> Hi!
>
> This isn't exactly on topic since it's a question about basic electronics
> and not synth DIY, but I hope you guys don't mind I ask this here.
>
> So: Lately I've really tried to learn about electronics, so I could learn
> not only to build stuff but also to understand how they work. I understand
> all the basic stuff, like Ohm's law, Kirchoff stuff, and I also understand
> some stuff about transistors and tubes, but there's one very basic thing
> that I don't exactly understand why it happens. It's about capacitors. I
> understand that they block direct current because of the very high
> resistance between the plates (or block after being fully charged!). I also
> understand what happens when u put them in series, parallel etc. I also
> understand why there can be accent current in a circuit with a capacitor, if
> the other plate is connected to AC source and the other one to ground -  the
> cap is consantly charged and discharged (or I can understand why it happens
> on the plate and part of the circuit that is connected to the AC source).
> But why does accent voltage, well I mean signal, actually pass the
> capacitor? What happens there? All the books I've read simply say that it
> happens but they don't say why. There are all the theories about coils and
> transistors etc., and I understand them, but why, oh why does AC, or maybe
> it would be more correct to ask, why does accent voltage, pass a capacitor
> since no electrons can actually go trough it? What's the theory behind this?
>
> I know all I would really need to know is simply that accent voltage passes
> a cap, but I'm one of those people who want to know more :) I hope my
> question made any sence!
>
> Please help me so I can sleep ;)
> Thanks in advance,
> Antti Pitkämäki
>
>
>