Em 13/9/2011 13:51, Electron escreveu:
> Nice circuit.=20

Thanks!


> Perhaps unnecessary to say, but a fuse probably wouldn't be wasted
> in this application, you never know the capacitor shorts..

.... then the resistor limits the current to around 10A and blows almost
immediately.

> A question: if I'm 100% sure that I'm getting my neutral/line wiring righ=
t, is
> there any safety risk/concern in touching the neutral wire?


It should be safe, unless there is some problem in the wiring.


>  I mean, could there
> ever happen anything at the power station that makes me get an electrical=
 shock
> if I touch the neutral wire? I don't think they'll ever swap neutral and =
line,
> it would even be quite hard to do technically for them (as, as far as I k=
now,
> neutral wires are all grounded).

It is not at the power station, it is at you utility pole or at the fuse
box in your house. A bad electrician can do this to you.


> Another question.. if I use an isolation transformer, neither touching ei=
ther of
> the secondary wires will provoke an electrical shock (of course not touch=
 both
> wires together :D ), right?


Yes.


> But what is that makes me get a little shock when I touch the line wire, =
the
> resistive path to earth or the capacitive coupling with the earth (thus i=
t would
> give me a shock even if I was flying and not touching the ground)?


The resistive path is the most probable. Under certain conditions even
the atmosphere can conduct enough current to give a shock.


With my circuit you don't need to worry about shocks, because you are
supposed to use an optoisolator (most of them isolate up to 7500V) to
transmit the data to the rest of your circuit. The part of the circuit
that is connected to the AC line is completely isolated from the rest,
you may even swap line and neutral that it will work correctly and safely.


Best regards,

Isaac

--=20
http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist
.