Faraday Cage Question?

I know a faraday cage blocks electric fields and waves and such, but does it also block charged ions.... things such as ozone, perhaps? Probably a stupid question, but its late and I'm tired. Probably not thinking straight. Thanks!

Question by transistorguy 8 years ago  |  last reply 8 years ago


how could a glove be made into a faraday cage?

would wrapping foil/wire mesh around it work? and would it be effective(and by effective i mean the wearer doesnt get zapped)?

Question by Aercimete 10 years ago  |  last reply 7 years ago


Has anyone any advice on building a Faraday cage for VHF - 20GHz or higher?

Hi, I've found lots on the 'net about building Faraday cages, but most of these are a couple of years old and targeted at lower frequencies up to around around the 2.4GHz range. I'm looking at making a Faraday cage for a room, to shield against a recent phone tower upgrade with transmissions now in the 19GHz range. (I've seen some other towers, fortunately not near me, recently approved for transmissions at 38GHz.) From what I've read so far, I'd need about 20 layers of heavy duty alfoil to come close to getting effective shielding, or wire with holes less than 7.5mm wide, which is going to be pretty tricky. Just wondering if anyone's tackled this problem before and, if so, how?

Question by powerup 2 years ago  |  last reply 2 years ago


Mobile Phones and Elevators

Ahem. Theoretically, an elevator is a perfect faraday cage -- no radio waves should be able to get into them. Mobile phones shouldn't work in them. But rogers says that their phones do work in them. So here's my question for you, instructables community: do rogers phones work in elevators? If so, why?The only theory that we could come up with was that each elevator has a little repeater in it, but that seems a bit costly.

Topic by threecheersfornick 10 years ago  |  last reply 10 years ago


I have a faraday question. Answered

I have a laptop that is an hp pavilion dm4 and it has an aluminum covering on the lid and some of the key board, so I was wondering if I could protect my laptop from emp and stuff just by grounding the lid. If anyone could answer this I would appreciate it. Thanx

Question by techno guy 7 years ago  |  last reply 7 years ago


Protection against EMP ...

Hi !Data :Let's say that I want to protect some important electronics devices against EMP.Let's say that they need to work 24/7 and that they are, thus, connected to an external source of power (electrical socket before EMP, and solar panel after EMP).Let's say that they need to emit and receive RF signals.Questions :1) As there are electrical connections with the exterior, a Faraday cage would be pointless, wouldn't it ?2) Would a solar panel survive to an EMP ?3) Is this possible to use the Faraday cage as an antenna for RF communication ? (I guess it's a stupid question as connecting the cage to the device would make the cage part of the device ...)4) Are thin and transparent gold foils enough to act as a Faraday cage ?_Edit : Interesting readings found thanks to the links Nachomahma provided :http://www.todaysengineer.org/2007/Sep/HEMP.asphttp://www.spectrum.ieee.org/archive/1543_Edit2 : an article about EMP protection.The first part is about EMP from nuclear bombs. The last part gives some clue about HMP.http://www.aussurvivalist.com/nuclear/empprotection.htm

Topic by chooseausername 11 years ago  |  last reply 11 years ago


Where can I get a powerful 14 MHz radio wave generator, and what can contain the waves? Answered

I need a somewhat powerful 14 MHZ radio wave generator. I know that these frequencies are probably illegal, so what can best contain them? I have heard that Faraday Cages can, and a parabolic reflector has also ocurred to me. What would be best to contain them, and is it possible to build one?

Question by Technicolor 7 years ago  |  last reply 5 years ago


RFID Tags and Passports

Well, I'm finally getting a passport, due to the new law. Sadly, however, in time for the RFID law as well. I don't want to be carrying one of those around in the airport. Wired said you can disable it by smacking it with a hammer, but it stated that tampering w/ a Passport is against the law, so is doing that against the law? But anyway, I would preferably just want to put it in something isolating, like a lead bag or something. Faraday cages seem the best plan, however I don't know what I will constantly ground to. Hope someone can help :-)

Topic by zachninme 12 years ago  |  last reply 9 years ago


SMTP to send email directly to a client

I have a project idea to create a BTRD, or Beer Theft Reporting Device. (Yeah, I need to come up with a more creative name... :P) The idea is to use an ESP32 microcontroller connected to an accelerometer and 6 pressure sensors mounted to a board, on top of which sits a six-pack. I do see a few problems though. hopefully wifi can penetrate the cold metal coffin without too much loss in signal. (I'm afraid the fridge may end up functioning like a faraday cage...)Assuming that isn't going to be a problem, I have been googling around trying to figure out if it would be possible to send automated emails from this device to inform of potential theft. Since I am not concerned about receiving emails at all, It seems overkill to have to use SMTP to send the mail I want to send to some server first, which then itself forwards the email on over through the internet over to a client. Is it possible to simply send the SMTP email directly to the recipient? I mean, if this is a product that I sell, then I would not want the end user to have to bother too much with configuring the device too much.

Question by -max- 1 year ago  |  last reply 1 year ago