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Old 28-01-2020, 12:37   #76
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Re: Making a Faraday cage- anyone done it?

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Originally Posted by Cadence View Post
I'm not sure some people realize a Faraday's Cage is no more than an easy route to ground around something? Enclose your electronics in anything you want if there is no path to ground you might as well be pissing up wind. It may keep a corona effect away but doubt that is more than static that makes the hair stand up on your arms.
Why do you write that? You have no clue and yet decide to write that?

No, a Faraday cage is not grounded.
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Old 28-01-2020, 13:01   #77
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Re: Making a Faraday cage- anyone done it?

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Why do you write that? You have no clue and yet decide to write that?

No, a Faraday cage is not grounded.
Sorry, maybe you should go back and look at it. Looked like a bird cage, where the hell do you think the voltage went? Granted lightning is HV but not like we produce. We can produce HV but not that momentary amount and amperage..
JMHO, but if even the corona can't be bled off?
I guess I would not post a personal attack on you.
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Old 28-01-2020, 21:33   #78
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Re: Making a Faraday cage- anyone done it?

Hoping to settle an argument here, here is a good general description of how a faraday cage works: https://science.howstuffworks.com/faraday-cage.htm


It'll take a few minutes to read. It seems few people want to read anything longer than a tweet these days.
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Old 28-01-2020, 22:08   #79
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Re: Making a Faraday cage- anyone done it?

Here's a brief how-to: https://hackaday.com/2018/09/26/building-a-hardware-store-faraday-cage/
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Old 29-01-2020, 06:14   #80
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Re: Making a Faraday cage- anyone done it?

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The microwave oven is a Faraday cage. How do you think it keeps the microwave energy inside so you dont cook?

The cage does not need to be grounded. The purpose is to allow the current to flow around the objects. Take an airplane as an example. They get hit by lightning all the time. The electricity just flows around the fuselage and they are not connected to any ground.

I would guess that even a metal mesh fruit holder that keeps bugs out would work.

So long as there is a path for some very high voltage and somewhat low current electricity to flow around the items you want to protect.

That being said. Lightning is a funny animal. Even a 'close' strike can set up a large voltage difference across a chip. This causes some erosion on the tiny wires in the chips and may contribute to a failure a week later. That happened to a TV. I saw the strike about 75 feet away and like 5 days later I went to turn on the TV and it did not turn on anymore.
If you enough voltage and amps, you can get a pretty serious static charge through the air. Something I learned one summer working for a power company, when I picked up a dead power line laying on the ground, that we were going to put up later, under some 750 kv transmission lines, on a humid day, and got the pee shocked out of me! The linemen all got a good laugh as they knew it was going to happen.

We were working around some pretty serious voltage, and the motto there was, "everything is a conductor if enough volts and amps are applied."
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Old 29-01-2020, 08:49   #81
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Re: Making a Faraday cage- anyone done it?

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If you enough voltage and amps, you can get a pretty serious static charge through the air. Something I learned one summer working for a power company, when I picked up a dead power line laying on the ground, that we were going to put up later, under some 750 kv transmission lines, on a humid day, and got the pee shocked out of me! The linemen all got a good laugh as they knew it was going to happen.

We were working around some pretty serious voltage, and the motto there was, "everything is a conductor if enough volts and amps are applied."
I think what you felt was a charge from an inductor (power line dead on ground) in a magnetic field (overhead power lines). You basically have a big transformer
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