William Beaty wrote:
On Thu, 25 Oct 2007, Stephen A. Lawrence wrote:
Horace Heffner wrote:
Good point. Another option along the same lines might be to simply
strip a section of the ground wire and connect the ground wire to the
faraday cage at the entry point using an alligator clip. It the
lights go out then the power is from an external source.
Wow, that's perfect!
Now why wasn't this obvious to start with? Dunno -- maybe it was to
others, but it sure wasn't obvious to me, at least.
But Ron DID report that the lights go out if you ground the cage. And
then there apparently was a bunch of flaming going on about whether a
Faraday cage is still a shield if not grounded.
He did? I sure missed that! (Wouldn't be the first time, for sure.)
My apologies, if that's the case.
I _thought_ he said he grounded the cage used in video #5 (I think that
was the first caged one?). He showed the lights on inside the cage,
through a little hole. If I'm not mistaken, that's also the video in
which he first disconnected one wire, and left it hanging next to the
cage; my impression, not supported by anything definite, is that in
video #5 it was "ground" which was disconnected from the circuit (the
circuit was floating inside a grounded cage). But maybe I'm conflating
#5 and #6 here.
As I recall, the first video with the cage showed the light on, and
panned down to show a ground wire on the cage. I don't recall any point
where the light went out in that video.
And I didn't think anything since then had actually been done in a
Faraday cage -- the circuit in video #7, which is the one with just a
ground wire, no power wire, is sitting in an open pie pan, but as far as
I can recall the cover is never placed over it. And I haven't heard
anything about the 75-led circuit being operated inside a cage.