Instructables

Can anyone help me with making a small EMP device?

I want to be able to build an EMP device that can scramble other small electronic devices.

pyrohaz5 years ago
I think you could just do it by charging a capacitor bank (Not sure of the joules required, possible around 30?) the discharge it through an electro magnet through a very powerful relay, if you look at this instructable article http://www.instructables.com/id/DC_to_DC_Boost_Converter_1/ that would work for a power supply for the capacitor and for the coil, use magnet wire or copper wire such as 20awg or so (im not sure if that would be thick enough) around a iron based core. connect a parabolic reflector to the end (or just a metal dog food bowl etc.) and that might work, not saying it will because i haven't tried it :p
yveg9 months ago
I would like to have a small emp device. I am willing to pay for all the expenses. Please let me know if someone can help.
jeff-o5 years ago
You know, that is quite illegal...
omnibot jeff-o5 years ago
Why would a small EMP-device be illegal? For what reason?
jeff-o omnibot5 years ago
At the very least, it violates most FCC regulations about interference-causing devices. In general, an EMP is designed only to cause damage to other equipment, and is therefore considered a weapon.
jj.inc jeff-o3 years ago
Not necessarily, they can be used to wipe data that you don't want. It causes harm still but for a good purpose. Could you use that as an excuse. Like I have an electromagnet for wiping tapes, it is really cool just so you know, I got it stuck to a folding chair and warped it.
omnibot jeff-o5 years ago
I see .. yes .. very good .. indeed very useful .. moah .. oha .. moah AH HA HA HA HAAAA!!!
PyroMonger (author)  omnibot5 years ago
Ask the governments of the world. They are the ones who outlawed it.
Hmm .. guessing someone doesn't want people to have that then unlike semiautomatics and revolver which are completely harmless.
PyroMonger (author)  jeff-o5 years ago
Yes I do but its for research purposes only. I am doing a research paper on electromagnetic fields and I thought it would be cool to actually build a working EMP device for a demonstration....I guess it's a bit of a high strung idea but I know it would get me extra marks. _ I'll have to find another project then...any other suggestions? Magnet related ones that is..?
Just because it's illegal doesn't mean you can't do it in a controlled environment. ;) I suppose the best way would be to discharge a massive capacitor bank into an electromagnet. I suppose you could also build a coil gun (gauss gun) or a rail gun using much of the same materials...
Slick36 jeff-o5 years ago
The best way to do it is demonstrate inside a faraday cage... no interference with anything outside of the cage...rite! And it is technically possible to build a directional EMP also... i think the faraday cage is easier... just put chicken wire around (all the way) and ground it
jeff-o jeff-o5 years ago
No problem! Just be careful - aside from the usual warnings about firearms, the capacitor bank will be storing lethal amounts of power. Make sure all the components, wires and other parts can handle the current. Build in safety features (especially important if this is a school project!) and use safe handling and operation procedures.
PyroMonger (author)  jeff-o5 years ago
I'm writing up my safety checklist right now. If this project is successful you will be sure to see it posted here on Instructables. I practically live on this website!
PyroMonger (author)  jeff-o5 years ago
Much obliged my friend. I think a coil gun would be a great alternative. I can't believe I didn't think of it before. The principles are very similar. Thanks
Its only illegal if you get caught. 20% of Instructables are illegal seriously... (well its probably close to 20%)
Well no, it's still illegal whether you get caught or not. It's only punishable if you get caught. ;)
entropy1114 years ago
there are two types of EMP devices..the easy one is just a modded LC Oscillator circuit...that's the version Pyrohaz is describing..the other one is much more powerful, flux compressor...Which is prolly more powerful than you need..(or should have!)..

as for the illegality...the LC version probably won't be strong enough to be detected...especially since it usually uses a parabolic dish to focus everything to a point....

but if you create one big enough...just be sure to put it in a Faraday cage (chicken coop cage, essentially)...to make sure you don't turn any heads..safer too...

but still..inductor coils are dangerous! lots of heart stopping current...tread lightly. also capacitors that big are no toy either..but i assume you know what your doing.
spccadet5 years ago
How's 80 MW from a short piece of coax and a couple capacitors?

http://www.google.com/patents?id=83B9AAAAEBAJ&dq=3798461
Sandisk1duo5 years ago
wire around a steel drum, with HUGE capacitors
(huge in power uf and volts)
PyroMonger (author)  Sandisk1duo5 years ago
I'm not sure you read my question right. I want a small EMP device and I think I've decided on what to do now. I'm going to go with the coil gun idea suggested by jeff-o.
randofo5 years ago
You can buy plans and kits here. Local laws may still apply.
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