Q&A for How to Build an EMP Generator

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  • Question
    What is the theory behind EMP?
    Community Answer
    The idea is that any conductor passing current creates a magnetic field around it (yes, even a simple wire). Also, a magnetic field near a conductor induces a current through said conductor. The EMP (ElectroMagnetic Pulse) device creates a strong magnetic field in a coil of some sort so the nearby electronics are induced current from that magnetic field. Since all ICs are basically transistors, and the transistor is switched by current, the ICs affected by the EMP stop working, and behave unexpectedly (like resetting, sending signals when they're not supposed to, etc.). If the EMP is strong enough, it can completely fry them.
  • Question
    At what distance can you knock out a radio?
    Community Answer
    You will not knock out any radio with this. You will be able to generate a low-power pulse and observe it on a measurement device like an oscilloscope but that's the most interesting thing you can do. This generator does not come close to a human-produced electrostatic discharge in terms of energy. And all electronic devices are shielded against it.
  • Question
    Can you make an EMP that only causes things to quit working for a while?
    Community Answer
    The EMP works by creating a surge in the device. Some devices will corrupt/scramble memory by flipping bits without damaging the components, allowing them to be rewritten to work again. Others will damage components, others will flip bits that are not rewritable and ruin those without factory equipment to rewrite them. There is no 'temporary knockout' EMP, only protected and recoverable devices.
  • Question
    What if I connect a larger-voltage battery?
    Community Answer
    You would charge the capacitor really fast. The capacitor is the limiting factor.
  • Question
    How do I increase the range of this EMP?
    Community Answer
    Add capacitors in a parallel.
  • Question
    Will another type of capacitor, such as the 2 Farad Capacitor, work for this?
    Community Answer
    No. It has to be a flash capacitor. Flash capacitors are designed to dump all power in microseconds. The 2 Farad Capacitor is designed as a stabilizer for the amplifier.
  • Question
    Is the wire a magnet wire? And what do I coat the wire with?
    Community Answer
    It is an insulated copper wire (commonly known as magnet wire). Go to an electrical shop for it and ask for insulated copper wire.
  • Question
    Can I make an EMP on a larger scale?
    Community Answer
    Yes. There is a mathematical proportion of turns on the coil to level of EMP. Also, the higher the amperage the better; just make sure you don’t run too much current through too small of a coil. If you change one, change the other.
  • Question
    Can this design be modified to disable noisy and speeding motorcycles on our quiet street?
    Community Answer
    No. This EMP knocks out electronical devices, but a motorcycle is mostly mechanical.
  • Question
    Can I shield an EMP generating device so that it will not affect surrounding devices?
    Community Answer
    Yes, if you put your EMP device in a Faraday cage.
  • Question
    What will be the range of this small EMP generator?
    Community Answer
    About 2 - 3" maximum. The larger the capacitor, the higher the range.
  • Question
    How do I make it more powerful?
    Ian Luedke
    Community Answer
    Just get larger and more high voltage compositors, or wire a lot of small ones together.
  • Question
    Would a donut-shaped coil be suitable for a more powerful range, and what other upgrades would be needed?
    Community Answer
    No, that would keep the magnetic flux contained, preventing it from doing the job.
  • Question
    Can a robber seeing this try to disable bank cameras and systems to steal by night?
    Community Answer
    No. The alarms are pinged every second. And EMP would notify the police instantly.
  • Question
    What should I do if I don't have a disposable camera?
    Community Answer
    You can use a high voltage converter instead, but you need to give the wires room to arc. Use insulation so it does not effect other wires.
  • Question
    Is it possible to add more flash capacitors by soldering them in parallel, and how would that effect the EMP?
    Community Answer
    Capacitors in parallel would give you the same voltage, but more current (more powerful and sustained output on coil).
  • Question
    Could this generator potentially disable a robot?
    Community Answer
    It is unlikely. This EMP generator is on the weaker side.
  • Question
    Can I use it to turn off a Nintendo 3DS?
    Community Answer
    Theoretically yes, if the pulse is strong enough. However, the pulse may cause some sort of damage to the system.
  • Question
    If I were to wire multiple capacitors in a series or parallel, what would happen?
    Community Answer
    A capacitor acts somewhat like a battery in this case. Batteries in parallel will deliver a higher charge for the same amount of time as a single battery. Batteries in series will hold the charge of a single battery for a longer amount of time. Due to the nature of capacitors, however, in this second case it would be multiple bursts of charges of short duration rather than a single charge of long duration.
  • Question
    How do I increase the range of what an EMP will affect?
    Community Answer
    A more powerful capacitor (or connect them in series), but a bigger capacity needs a bigger coil, too.
  • Question
    What are the waves that an EMP device knocks out?
    Community Answer
    This will not knock out any waves, but causes a surge in electrical devices in close proximity to the EMP.
  • Question
    Will it completely kill the device?
    Community Answer
    It depends on the complexity of the device and the sensitivity.
  • Question
    What is the maximum voltage I should use?
    Community Answer
    There is not a general maximum voltage for the EMP, but rather a maximum voltage for your wire. If there is too much voltage on a thin wire, then the wire will melt.
  • Question
    Can I disable a calculator using an EMP generator?
    Community Answer
    Yes, you should be able to disable small electronic devices like calculators.
  • Question
    Can an EMP device deactivate or destroy a human chip implant?
    Community Answer
    Theoretically, yes; it would disrupt and corrupt the chip.
  • Question
    Does an EMP generator destroy or just stop electronics?
    Community Answer
    This depends on the equipment used to build the EMP, if built correctly this EMP should only be able to disable smaller and older devices. Although with stronger and more expensive parts, an EMP could permanently damage electronic devices.
  • Question
    Would this turn off electronics or fry them?
    Community Answer
    This EMP would only disable electronics. It would have to be way more powerful to fry them.
  • Question
    Can this EMP generator disrupt CCTV cameras?
    Community Answer
    No, it cannot disrupt CCTV cameras.
  • Question
    How powerful of an EMP generator can this method make?
    Community Answer
    The EMP generator that is demonstrated above is not very powerful. Depending on the capacitor, it should be able to temporarily disable smaller and slightly older electronic devices.
  • Question
    What devices have larger capacitors of the correct type that will allow increased power?
    Community Answer
    You could use a professional flash unit from a digital camera.
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