4 ms·
Or, "How to kill people with pacemakers". Seriously, there are a lot of bad uses for this which have nothing to do with phones.
by M_Grey 10y ago
Or, "How to kill people with pacemakers". Seriously, there are a lot of bad uses for this which have nothing to do with phones.
- subliminalpanda 10y agoOr one of those going off on a plane. Horrible consequences.
- M_Grey 10y agoOh damn it... that's a good point. What would the effect be if you got one into a critical part of a power or transmission station too? Not good I bet.
- subliminalpanda 10y agoKnock out a city block or worse.
- deleted 10y ago[deleted]
- noir_lord 10y agoNot a great deal tbh. Inverse square law means it'll have bugger all range and those kinds of systems are large enough with enough 'capacity' to just soak it up. Next to the control computer maybe but not in a transmission station.
- robryk 10y agoThen you could just as well bring a crowbar and throw it at something to cause a short. Or just smash stuff manually. This device has a very small range.
- M_Grey 10y agoSure, but then someone finds a crowbar, or smashed stuff... what obvious trace would this leave, and could it be scaled up?
- venomsnake 10y agoShortcircuit something that transfers couple of gigawatts with a crowbar and you will have molten crowbar puddle at the end. Or vaporized.
- M_Grey 10y agoA puddle of crowbar is still going to be forensically valuable, and a lot easier to find than for example, bomb fragments.
- desireco42 10y agoYou would not be able to take this into a plane, but good thought.
- Sanddancer 10y agoYou'd need a lot more current in order to cause horrible consequences for an airplane. Lots of redundant systems, lots of testing for electromagnetic tolerance.
- subliminalpanda 10y agoI really hope so. I love to travel.
- kahrkunne 10y agoI don't think they're gonna let you take your emp device on board
- tcas 10y agoThis is what a setup for testing airplanes for EMP tolerance looks like: https://en.wikipedia.org/wiki/ATLAS-I https://en.wikipedia.org/wiki/ATLAS-I Note that this isn't used anymore. And here's an anechoic chamber for testing military craft: https://en.wikipedia.org/wiki/Benefield_Anechoic_Facility https://en.wikipedia.org/wiki/Benefield_Anechoic_Facility Now I'm curious to see an A380 in an anechoic chamber... Are full airplanes normally tested in a chamber? Or only the individual systems?
- eternauta3k 10y agoWhy do you need a chamber?
- madengr 10y agoFully anechoic chambers are for antenna pattern testing and scenario testing where you don't want reflections; you want to simulate free space such as planes in the air. Semi-anechoic is for electromagnetic compliance testing. They have absorber on walls but not floor. Typically don't want signals to get out. Bare floor sort of mimics earth, as ground plane can guide wave. Some chambers are fully reflective with mode stirrers, but those are specifically for EM susceptibility testing.
- 10y ago
- bsder 10y agoOh, please. An induction coil charger probably emits more power. In addition, this emits a VERY wide bandwidth noise pulse (look at the frequency output of a spark gap transmitter) which of necessity puts very little power in any specific band.
- mmagin 10y agoThis is being operated at distances where you could just as easily hit the device directly with a hammer. To scale the distance up to just a couple of meters (say about 50 times the distance), you'd need to scale up the power by about 50*50 = 2500 times. I suppose it is conceivable that a suitcase-sized device could disrupt the actions of pacemakers of people walking within a meter or two. But it could just as well cause trouble with much more conventional means.
- madengr 10y agoActually even more since some near-field components fall off at 1/r^3.
- eternauta3k 10y agoCorrect me if I'm wrong: the near fields don't take out any energy if nothing's coupling to them. They're like a reactive load. The far fields, however, take energy out to infinity regardless of what's out there.
- madengr 10y agoYep, correct. I posted a link in another comment, but this is a good picture of all the components for small dipoles and loops. http://www.rfcafe.com/references/electrical/near-far-field.htm http://www.rfcafe.com/references/electrical/near-far-field.h...
- mlonkibjuyhv 10y agoQuick question: if you put a sink in the far field, does that increase energy drain at the source, or is the definition of the far field such that the field strength around the vicinity of the sink is the only thing practically affected?
- madengr 10y agoNo additional energy drain. In fact, one of the definitions of far field is that any thing in it can't change the impedance of the radiating antenna. There is a good article in this months IEEE APS magazine exploring where the far field begins. Coincidence I was reading it last night.
- disposablezero 10y agoDick Cheney has several vulnerabilities, besides disabled telemetry.