Homemade EMP

[Esproc]

for some reason i wanna make a homemade EMP. anyone have any pointers/ideas or instructions?

[Mr. Brownstone]

http://www.google.com/search?q=homemade+emp

[Esproc]

yah i did that. got
http://www.eio.com/public/inductor/index.html#12
and
http://mdesigns.serverblitz.com/homemadeweapons/phpBB2/viewtopic.php?t=11&highlight=emp

[The Holy One]

That's just crazy. :p

[Pyros]

Ugh, I don't have the $400 to make one.

[albrozdud3]

So... uh, why do you wanna make one? :confused:

[Mr. Brownstone]

Maybe he wants to rob the Bellagio.

[Esproc]

for fun, and to break my couzes comp

so an EMP is just a really really really big magnet?

[Athorne]

So the other day I was walking in the park and a man came up to me and said: "Hey there I believe you dropped your set it off in a store and steal as much as you can Wallet." I checked and sure enough it was my wallet. I took it, gave him 5 dollars, and thanked him then walked off.

[Spawnie]

Originally posted by Athorne
So the other day I was walking in the park and a man came up to me and said: "Hey there I believe you dropped your set it off in a store and steal as much as you can Wallet." I checked and sure enough it was my wallet. I took it, gave him 5 dollars, and thanked him then walked off.

:haha: :up:

[RocketGib]

Originally posted by Athorne
So the other day I was walking in the park and a man came up to me and said: "Hey there I believe you dropped your set it off in a store and steal as much as you can Wallet." I checked and sure enough it was my wallet. I took it, gave him 5 dollars, and thanked him then walked off.

:confused:

[BOT(0)]

Athorne, i'm not quite sure what that realy has to do with anything, only realation i can see in money. i cant talk though.

this is awsom im so makeing a emp device. for all the times i need to make the school computers randomly shut down.

[Minx]

Originally posted by Pyros
Ugh, I don't have the $400 to make one. Mow lawns.

[Spawnie]

Originally posted by Minx
Mow lawns.

Even better, ask us all about it, then dont bother.

[Nessus]

Originally posted by Spawnie
Even better, ask us all about it, then dont bother.

At least there wasn't a "what's ur fav bradn of lanwmovers?1?"-poll. :D

[Minx]

Or sell Kathaksung's IP. :o

Originally posted by Nessus the Lad
At least there wasn't a "what's ur fav bradn of lanwmovers?1?"-poll. :D Juan in "Desperate Housewives", isn't it :o

[Athorne]

Originally posted by BOT(0)
Athorne, i'm not quite sure what that realy has to do with anything, only realation i can see in money. i cant talk though.

Wow, that went over your head like a 747.

[TG]

Quick question..

I thought shielding didn't work against an EMP..

The link http://www.totse.com/en/bad_ideas/ka_****ing_boom/161699.html states otherwise though..?

[Khendraja'aro]

Originally posted by TG
Quick question..

I thought shielding didn't work against an EMP..

The link http://www.totse.com/en/bad_ideas/ka_****ing_boom/161699.html states otherwise though..? Of course shielding works. Ever heard of a Faraday Cage?

[TG]

Originally posted by Khendraja'aro
Of course shielding works. Ever heard of a Faraday Cage?

Duh...

bah.. you force me to look it up.. :down:

[TG]

Such a high frequency pulse can pass through faraday cages used to ground electromagnetic energy from lightening. However, even if the cages were effective they would still be easily bypassed since any wires running from the devices within them would act as antennae and conduct the high transient voltage. There is also a so called 'late-time EMP effect.' This refers to the observations of EMPs creating localized magnetic fields within electrical systems they pass through that soon collapse sending huge surges through power and telecommunication infrastructure. This sparks a chain reaction in which all devices attached to these lines will be rendered useless by the massive surge. http://www.unitedstatesaction.com/emp-terror.htm

..

[Khendraja'aro]

30 KHz is hardly what I'd call a "high-frequency" burst.

Microwaves, for example, use 2.455 GHz - and they're shielded quite well. I dare say that my kidneys are not boiled yet.

[Gogenks]

Labtop go boom? :bulb:

[Khendraja'aro]

Oh, as an addendum: Those guys don't even get the history right. They did not even wonder why the Faraday cage was named "Faraday"...
From their site:
That is when they discovered the "rays" that were harmful, as well as the phase transformations. In the course of their work, one of the scientists discovered that simply covering an object with a grounded copper mesh would stop virtually all electromagnetic radiation, whether proton or neutron. Obviously, they had to protect their monitoring equipment! Thus was born the "Faraday cage."

Now, here's the actual, factual truth from wikipedia:
The Faraday cage is an electrical apparatus designed to prevent the passage of electromagnetic waves, either containing them in or excluding them from its interior space. It is named for physicist Michael Faraday, who built the first one in 1836.

And I won't even get into their mixing up of terms like: "electromagnetic radiation, whether proton or neutron" :rolleyes:

[[T]Baxter]

Originally posted by Khendraja'aro
30 KHz is hardly what I'd call a "high-frequency" burst.

You wanna see a high-frequency burst? Come to my place after I eat 12 tacos and a big bowl of stewed prunes...

:cry:

[Nessus]

Originally posted by Khendraja'aro
30 KHz is hardly what I'd call a "high-frequency" burst.

Microwaves, for example, use 2.455 GHz - and they're shielded quite well. I dare say that my kidneys are not boiled yet.

What kind of frequency do cellphones work on? Have you tried putting one in an (unactive, obviously :o) microwave and calling it? :D

[Khendraja'aro]

Originally posted by Nessus the Lad
What kind of frequency do cellphones work on? Have you tried putting one in an (unactive, obviously :o) microwave and calling it? :D
GSM cell phones use frequencies within four different frequency bands:

*850 MHz (824.2 - 848.8 MHz Tx; 869.2 - 893.8 MHz Rx)
*900 MHz (880-2 - 914.8 MHz Tx; 925.2 - 959.8 MHz Rx)
*1800 MHz (1710.2 - 1784.8 MHz Tx; 1805.2 - 1879.8 MHz Rx)
*1900 MHz (1850.2 - 1909.8 MHz Tx; 1930.2 - 1989.8 MHz Rx)

Thus it stands to reason that the shielding of microwaves should also work for the lower frequencies (which are generated at a much lower power level - remember that a microwave usually consumes several hundred Watts).

I can't test it, though, as our house contains some steel-concrete and thusly is already quite "EMP-proof" ;)

[TG]

Originally posted by Khendraja'aro
Oh, as an addendum: Those guys don't even get the history right. They did not even wonder why the Faraday cage was named "Faraday"...
From their site:


Now, here's the actual, factual truth from wikipedia:


And I won't even get into their mixing up of terms like: "electromagnetic radiation, whether proton or neutron" :rolleyes:

You're absolutely correct on all of the above..
still I do distinctively recall having read or seen that simple farraday cages aren't enough to provide shielding, not even when grounded. obviously I'd have to delve into in much deeper.. Unfortunately I'm tied into some other time consuming stuff atm so I'll bump this thread again as soon as I find the time.. :D:up:

[colette]

Originally posted by Esproc
for some reason i wanna make a homemade EMP. anyone have any pointers/ideas or instructions?

u r off ur rocker

:weird:

[EmP]

Originally posted by Khendraja'aro Of course shielding works. Ever heard of a Faraday Cage? No, there is no shielding aginst me :) Magnetic field, if it is strong enough, it can't be absorbed with something like that, range dissipation is only thing that helps :) If you'd realy like to create EMP, make transistor without secundar. Bigger piece of iron enveloped with conducting wires if rough example of magnet. Just don't do it near your computer!

[Khendraja'aro]

Originally posted by EmP
No, there is no shielding aginst me :) Magnetic field, if it is strong enough, it can't be absorbed with something like that, range dissipation is only thing that helps :) If you'd realy like to create EMP, make transistor without secundar. Bigger piece of iron enveloped with conducting wires if rough example of magnet. Just don't do it near your computer! Farady cages don't absorb EM waves. Yes, magnetic fields can pass them - but that's a different phenomenon altogether.

Please do not mix electric / magnetic fields and electro-magnetic waves like they're all the same.

[Nessus]

Originally posted by Khendraja'aro

Thus it stands to reason that the shielding of microwaves should also work for the lower frequencies (which are generated at a much lower power level - remember that a microwave usually consumes several hundred Watts).

I can't test it, though, as our house contains some steel-concrete and thusly is already quite "EMP-proof" ;)

Cell phones do work inside microwave ovens, the trick is that the oven's waves are constructive at certain points and thus water begins to react more violently there. There's an example with some egg yolk and a zip-lock bag, but you're not that geeky I'm sure :o

[Khendraja'aro]

Originally posted by Nessus the Lad
Cell phones do work inside microwave ovens, the trick is that the oven's waves are constructive at certain points and thus water begins to react more violently there. There's an example with some egg yolk and a zip-lock bag, but you're not that geeky I'm sure :o As far as I know Microwaves are tuned to the Eigenfrequency of water - there's no "reaction", the water molecules simply resonate with the wave thus they begin to vibrate / move / rotate faster thus leading to an increase in temperature.

And I'm not quite sure, what exactly should hinder the waves from being constructive outside the oven?

[Nessus]

Originally posted by Khendraja'aro
As far as I know Microwaves are tuned to the Eigenfrequency of water - there's no "reaction", the water molecules simply resonate with the wave thus they begin to vibrate / move / rotate faster thus leading to an increase in temperature.

Yes, this is true. I suppose I mis-used the word reaction. :o The molecules react to the stimulus, though :D

Originally posted by Khendraja'aro
And I'm not quite sure, what exactly should hinder the waves from being constructive outside the oven?

If I understood the prof. correctly, the walls do make the waves bounce back in (again the wrong word, don't rag on me :p), and the shape of the oven makes a gridwork of "hotspots" of activity inside the oven. The waves don't really get to escape that much I'd imagine, there are still safety regulations. :o (Of course you can look this all up on howstuffworks or something, I could and probably am wrong about some of these things :o)

[Khendraja'aro]

Originally posted by Nessus the Lad
If I understood the prof. correctly, the walls do make the waves bounce back in (again the wrong word, don't rag on me :p), and the shape of the oven makes a gridwork of "hotspots" of activity inside the oven. The waves don't really get to escape that much I'd imagine, there are still safety regulations. :o (Of course you can look this all up on howstuffworks or something, I could and probably am wrong about some of these things :o) Heh, but that's the perfect example for the workings of the Faraday cage - you're "trapping" the EM wave inside the cage :p

[Nessus]

Originally posted by Khendraja'aro
Heh, but that's the perfect example for the workings of the Faraday cage - you're "trapping" the EM wave inside the cage :p

But some still leaks out, see the cellphone example :p