Useful Tips

Amy do-it-yourself emitter - How to create an electromagnetic pulse 🚩 directional electromagnetic pulse 🚩 Natural sciences

Our experienced team of editors and researchers contributed to this article and tested it for accuracy and completeness.

The number of sources used in this article is 8. You will find a list of them at the bottom of the page.

The wikiHow content management team carefully monitors the work of editors to ensure that each article meets our high quality standards.

The electromagnetic pulse generator (EMP) is one of the favorite devices of science fiction authors and action movies. Sufficiently powerful electromagnetic pulses can disable nearby electronic devices. Be careful, as this can be dangerous. Children should do an EMR generator under adult supervision.

How to make a simple DIY EMP emitter!

CAUTION HIGH VOLTAGE!
Good day lovers of interesting homemade goods! About a year ago, I first learned how to make an EMP emitter to influence various electronics from short distances. Naturally, I immediately wanted to make such a homemade product, since it is quite effective and in practice shows the operation of electromagnetic pulses. In the first models of the EMR emitter there were several high-capacitor capacitors from disposable cameras, but this design does not work very well, due to the long "recharge". Therefore, I decided to take the Chinese high-voltage module (which is usually used in stun guns) and add a “punch” to it. This design suited me. But unfortunately my high-voltage module burned down and therefore I could not shoot an article on this homemade product, but a detailed assembly video was shot from me, so I decided to take some points from the video, I hope the admin will not mind, because the homemade product is really very interesting.

I would like to say that all this was done as an experiment!

And so for the EMP emitter we need:
high voltage module
- two 1.5 volt batteries
box for batteries
-case, I use a 0.5 plastic bottle
- copper wire with a diameter of 0.5-1.5 mm
-button without lock
wire

From the tools we need:
soldering iron
thermal glue

And so, first of all, you need to wind a thick wire of about 10-15 turns on the top of the bottle, turn to turn (the coil very much affects the range of the electromagnetic pulse, the spiral coil with a diameter of 4.5 cm is best shown) then cut the bottom of the bottle



We take our high-voltage module and solder the power supply to the input wires through the button, after removing the batteries from the box


Take a tube from the handle and cut a piece of 2 cm from it:


We insert one of the output wires of the high voltage into the segment of the tube and glue it as shown in the photo:

Using a soldering iron, make a hole on the side of the bottle, slightly larger than the diameter of the thick wire:

We insert the longest wire through the hole inside the bottle:

Solder to it the remaining wire of the high voltage:

We have a high-voltage module inside the bottle:

We make another hole on the side of the bottle, with a diameter slightly larger than the diameter of the tube from the handle:

We pull out a segment of the tube with the wire through the hole and firmly glue and insulate with thermo glue:


Then we take the second wire from the coil and insert it into the piece of the tube, between them there should remain an air gap of 1.5-2 cm, it is necessary to select experimentally


we put all the electronics inside the bottle so that it doesn’t close anything, does not hang out and is well insulated, then we glue it:


Make another hole along the diameter of the button and pull it out from the inside, then glue it:


Take the cut bottom and cut it along the edge so that it can fit onto the bottle, put on and glue it:

OK it's all over Now! Our EMR emitter is ready, it remains only to test it! To do this, we take an old calculator, remove valuable electronics and preferably put on rubber gloves, then press the button and hold the calculator, breakdowns of electric current will begin to occur in the tube, the coil will begin to emit an electromagnetic pulse and our calculator will turn on first, and then start randomly writing numbers !

Before this home-made work, I did an EMR on the basis of a glove, but unfortunately I shot only a test video, by the way with this glove I went to the exhibition and took second place due to the poor presentation of the presentation. The maximum range of the EMP gloves was 20 cm. I hope this article was interesting to you, and be careful with high voltage!

Here is a video with tests and an EMP glove:

Thank you all for your attention!

Become the author of the site, publish your own articles, descriptions of homemade goods with payment for text. More details here.

Electronics Shredder | DIY workshop

| DIY workshop

Imagine that you have some kind of device that can disable any electronics at a distance. Agree, it seems like the scenario of some kind of science fiction film. But this is not fiction, but quite a reality. Such a device will be able to make almost anyone with their own hands, from parts that can be freely obtained.

How to make a do-it-yourself electromagnetic pulse generator

You got too loud music neighbors or just want to make some interesting electrical device yourself? Then you can try to assemble a simple and compact electromagnetic pulse generator, which is able to disable electronic devices nearby.

The EMP generator is a device capable of generating short-term electromagnetic disturbances that radiate outward from its epicenter, disrupting the operation of electronic devices. Some bursts of EMR occur in nature, for example, in the form of an electrostatic discharge. There are also artificial bursts of electromagnetic radiation, such as a nuclear electromagnetic pulse.

This article will show you how to assemble an elementary EMR generator using commonly available elements: a soldering iron, solder, a disposable camera, a switch button, an insulated thick copper cable, an enamelled wire, and a high-current fixed switch. The presented generator will not be too strong in power, so it may not be able to disable serious equipment, but it can affect simple electrical appliances, so this project should be considered as a training for beginners in electrical engineering.

So, firstly, you need to take a disposable camera, for example, Kodak. Next you need to open it. Open the case and find a large electrolytic capacitor. Do this with rubber dielectric gloves so as not to get an electric shock when the capacitor discharges. When fully charged, it can be up to 330 V. Check with a voltmeter the voltage on it. If there is still a charge, remove it by locking the capacitor terminals with a screwdriver. Be careful, a flash with a distinctive pop will appear when shorted. Having discharged the capacitor, pull out the circuit board on which it is installed and find the small on / off button. Solder it, and in its place solder your button-switch.

Solder two insulated copper cables to the two pins of the capacitor. Connect one end of this cable to a high current switch. Leave the other end free for now.

Now you need to wind the load coil. Wrap the wire with enamel coating 7 to 15 times around a round object with a diameter of 5 centimeters. Having formed the coil, wrap it with adhesive tape for greater safety during its operation, but leave two protruding wires to connect to the terminals. Use sandpaper or a sharp blade to remove enamel from the ends of the wire. Connect one end to the capacitor terminal and the other to a high current switch.

Now we can say that the simplest electromagnetic pulse generator is ready. To charge it, simply connect the battery to the corresponding contacts on the printed circuit board with a capacitor. Bring some portable electronic device to the coil, which is not a pity, and press the switch.

Remember that you should not hold down the charge button when generating EMR, otherwise you may damage the circuit.

Shredder Principle

The principle of operation remotely resembles the operation of a Tesla transformer and a stun gun. An electronic high-voltage boost converter is powered from the battery. The load of the high-voltage converter is a series circuit of a coil and a spark gap. As soon as the voltage reaches the breakdown level of the arrester, a discharge occurs. This discharge makes it possible to transfer all the energy of a high-voltage pulse to a coil of wire. This coil converts a high voltage pulse into a high amplitude electromagnetic pulse. The cycle is repeated several hundred times per second and depends on the frequency of the converter.

What is needed for assembly?

- 3.7V batteries - aliexpress
- Case - aliexpress
- High voltage converter - aliexpress
- Switches two pieces - aliexpress
- Super glue.
- Hot glue.

We take the case and drill holes for the switches. One from the bottom, the other from the top. Now make the coil. Wrap around the perimeter of the body. We fix the coils with hot glue. Each coil is separated from each other. The coil consists of 5 turns. We collect everything according to the scheme, solder the elements. We insert an insulating gasket between the contacts of the high-voltage switch so that the spark is inside and not outside. We fix all the parts inside the case, close the case cover.

The result of the magnetic gun

The gun famously knocks out almost all the chips, of course there are exceptions. If you have unnecessary electronic devices, you can check the work on them. The electronic shredder is very small and fits comfortably in your pocket.
Test on the oscilloscope. Keeping the probes at a distance and not connecting, the oscilloscope just rolls over.

We disable the flashing LED with a built-in controller.

How to make a do-it-yourself compact EMP emitter based on a bracelet!

Good day! In one of my author’s articles, I showed how you can make a very simple EMP emitter, with which you can drive your electronics crazy and act on it in every way, but that EMP emitter didn’t affect phones with a metal cover, and was also quite bulky . In today's article, I would like to show you how to make an improved model of a concealed EMP emitter with a do-it-yourself hand-held mount. This model is not only small and convenient in size but also capable of influencing “shielded” devices (in my case, a xiaomi phone)

Well, the homemade product is very interesting, and is able to show the beginners in practice the effect of electromagnetic pulses, in general, we will not pull.

Caution! High voltage!


And so for the manufacture of a secretive version of the EMP emitter, we need:
3-6 volt high-voltage converter (took here on Ali)
- a tube from a plastic handle
- a piece of rubber or flexible plastic for insulation
dense fabric
needle and thread
wire
-switch without latch
- a power source of 3-6 volts (I use a battery from a quadrocopter with 3.7 volts 500 mah. I really do not recommend using a 18650 battery for these models, since my last module burned out from it, and generally it is advisable to use 3-4 volts for nutrition)
thermal shrinkage
-mini high-frequency coil (I use a coil for picking up a magnetic field from a magnetic tape from an old tape recorder, you can try to rewind yourself, but this coil gave the best result, besides it is very small)
-insulating tape
- a tube from a dropper
- two wires of type "father" (if the battery is like mine)

Of the tools we will also need:
-Soldering iron and small items for soldering
thermal glue
-scissors
-tweezers
-sewing machine


And so the first thing to do is to sew the fasteners on the arm from the fabric, (the sister kindly agreed).
It should turn out something like this, for fixing the device itself and convenient location under the power button (on the glove-bracelet there are traces of thermal glue from past homemade products):

Now let's take a high-voltage converter and solder a button to one of its input reason, solder a male cable to this button, and solder a male cable to another input wire
(These wires are needed only in the case of the same battery, if you have a normal power source, then use ordinary wires), you should get this diagram:

Using the wires, we connect the power source to our high-voltage module, observing the polarity:

Testing:
We place the two terminal wires at a distance of 0.5 - 2 cm, press the button and if an electric discharge occurs between the cantacts, then everything works.

Attention! Be careful! High voltage!


Take a regular tube from the handle and cut a piece of 2-3 cm long with a small file or a soldering iron:


We insert one of the output wires of the high voltage into our workpiece, but not deeply, the wire should go inside no deeper than 5 mm, then we fix everything with thermal glue:

We take our high-frequency coil to remove the magnetic field from tape tapes. On these coils, there are usually 4 contacts, since there are usually 2 contacts, use a multimeter to ring them and determine which contacts belong to one coil, then solder them in a sequential manner (this will be the greatest resistance than from parallel soldering) then solder to two the remaining contacts have two wires, after which one of them is also inserted into the piece from the plastic tube, and the second wire is soldered to the remaining high-voltage wire.
Now we need to make the contacts fit: we try to adjust the distance between the wires inside the tube, we need to set the maximum distance, but so that the discharge occurs anyway, after finding this distance we fix the wires with thermal glue, but so that air can pass into the tube, this is important , experiments have shown that if there is a hermeticization, then after several discharges they cease to occur, most likely this is due to the interaction of the current with the electric field.
In general, it should turn out like this:

We test our blank on an electronic device (in my case it’s still a tablet, since I’m taking it off to the phone), we bring it to the coil and press the button, if the tablet starts to dull and turn on applications spontaneously and generally go crazy, then everything is done correctly:


Now you need to insulate all the contacts with the help of heat shrinkage, and on the high-voltage wires we put pieces of tubes from the dropper, it is also desirable to wind everything up with electrical tape. And yes, you need to do all this with the power source disconnected from the high voltage:


Well, we begin the final assembly of our glove:
First, glue our power source to it, glue it so that it is convenient:

Then we glue our module, input wires to the palm of your hand:

Glue a piece of rubber or flexible plastic next to the high voltage (of course, it is best to completely isolate the entire glove in this way):

Glue a high-frequency coil on our insulation and carefully place the wires:

The arrester is also glued as neatly as possible and also preferably on the insulation (I would have glued it, but I didn’t have the length of the wire) of course it doesn’t look very neat, probably the thermo glue and fabric and hands are not compatible from that place:

Then we glue our button on the edge of the entire glove, approximately like this:

OK it's all over Now! Our EMP glove is ready and you just have to test it! We put on a glove on our hand, once again we check the insulation and testly press the button, then we take any phone, turn it on and bring it to the coil, while the phone even with a metal cover starts to dumb terribly, and so with almost all electronic devices, the calculator generally turns on , the range with my battery is about 5-10 cm from the coil. Of course, this homemade product is more suitable for entertainment than for practical use, but such a simple homemade product can clearly show the beginners in the world of physics and electronics the effect of electromagnetic pulses on microcircuits and conductors, which are not so easy to show.

Here is a detailed video with tests and assembly:

Well, thank you all for your attention!

Become the author of the site, publish your own articles, descriptions of homemade goods with payment for text. More details here.

Electromagnetic Pulse Generator - PART 1

This serious project shows how to get a pulse of electromagnetic energy of several megawatts, which can cause irreparable harm to electronic communication equipment that is sensitive to electromagnetic interference. A nuclear explosion causes a similar impulse; special measures must be taken to protect electronic devices from it. This project requires the accumulation of a lethal amount of energy, and should not be attempted to implement outside a specialized laboratory.A similar device can be used to disable computer-based vehicle control systems in order to stop the car in unusual cases of theft or if drunk is driving

Fig. 25.1. Laboratory Electromagnetic Pulse Generator

and a driver dangerous for motorists around. Electronic equipment can be tested using an electronic pulse generator for sensitivity to powerful pulsed interference - to lightning and a potential nuclear explosion (this is true for military electronic equipment).

The project is described here without specifying all the details, only the main components are indicated. A cheap open spark gap is used, but it will give only limited results. To achieve optimal results, a gas or radioisotope arrester is needed, which is effective for interfering with a potential nuclear explosion (Fig. 25.1).

General description of the device

Shock wave generators are capable of generating focused acoustic or electromagnetic energy, which can destroy objects, can be used for medical purposes, for example, to destroy stones in the human internal organs (kidneys, bladder, etc.). An electromagnetic pulse generator can generate electromagnetic energy, which can destroy sensitive electronics in computers and microprocessor equipment. Unstabilized LC inductance circuits can generate pulses of several gigawatts by using wire blasting devices. These high-energy impulses - electromagnetic impulses (in the foreign technical literature EMR - ElectroMagnetic Pulses) can be used to test the hardness of metal parabolic and elliptical antennas, beeps and other directed remote actions on objects.

For example, research is currently underway to develop a system that will disable a car during a dangerous high-speed pursuit of a person who has committed an illegal act, such as a hijacker or a drunk driver. The secret is to generate a pulse with sufficient energy to burn the electronic control processor modules of the car. This is much easier to do when the car is covered with plastic or fiber, than when it is coated with metal. Shielding with metal creates additional problems for a researcher developing a practically applicable system. You can build a device for this difficult case, but it can be expensive and have a harmful effect on friendly devices, at the same time incapacitating them. Therefore, researchers are in search of optimal solutions for peaceful and military purposes using electromagnetic pulses (EMP).

The goal of the project is to generate a peak energy pulse for testing the strength of electronic equipment. In particular, this project explores the use of such devices to disable vehicles due to the destruction of computer microcircuits. We will conduct experiments on the destruction of circuits of electronic devices using a directed shock wave.

Attention! The bottom project uses deadly electrical energy, which, if improperly contacted, can kill a person instantly.

The high energy system to be assembled uses an exploding wire, which can create shrapnel-like effects. Discharging the system can seriously damage the electronics of nearby computers and other similar equipment.

Capacitor C is charged from the current source to the voltage of the power source for a certain period of time. When it reaches a voltage corresponding to a certain level of stored energy, it is given the opportunity to quickly discharge through the inductance of the resonant LC circuit. A powerful, non-damped wave is generated at the natural frequency of the resonant circuit and at its harmonics. The inductance L of the resonant circuit can consist of a coil and the inductance of the wire connected to it, as well as the intrinsic inductance of the capacitor, which is about 20 nH. A circuit capacitor is an energy storage device and also affects the resonant frequency of the system.

Emission of an energy pulse can be achieved by means of a conductive conical section or a metal structure in the shape of a horn. Some experimenters may use half-wave cells with power supplied to the center of a coil connected to a resonant circuit coil. This half-wave antenna consists of two quarter-wave sections tuned to the frequency of the resonant circuit. They are coils, the winding of which has approximately the same length with a quarter wavelength. The antenna has two radially directed parts parallel to the length or width of the antenna. Minimal radiation occurs at points located along the axis or at the ends, but we have not tested this approach in practice. For example, a gas discharge lamp will flash brighter at a distance from the source, indicating a powerful directional pulse of electromagnetic energy.

Our test pulse system generates electromagnetic pulses of several megawatts (1 MW of broadband energy), which are distributed using a conical sectional antenna consisting of a parabolic reflector with a diameter of 100-800 mm. An expanding metal horn of 25 × 25 cm also provides a certain degree of impact. Special

Fig. 25.2. Functional diagram of a pulsed electromagnetic generator Note:

The basic theory of the device:

The LCR resonant circuit consists of the components shown in the figure. Capacitor C1 is charged from a DC charger with current lc. Voltage V at C1 opg * a ’ouivwrcs. ratio:

The spark gap GAP is set to start at a voltage of V just below 50000 V. At startup, the peak current reaches the value:

1. Cycle charge a: dv = ldt / C.

(Expresses the charge voltage on the capacitor as a function of time, where I is the direct current.)

2. The accumulated energy in C as a function of voltage: £ = 0.5CV

(Expresses energy in joules with increasing voltage.)

3. Response time V * peak current cycle: 1.57 (LC) 0 - 5. (Expresses the time for the first peak of the resonant current when starting the spark gap.)

4. Peak current at point V * of the cycle: V (C / D 05 (Expresses peak current.)

5. The initial response as a function of time:

Ldi / dt + iR + 1 / C + 1 / CioL>

(Expresses stress as a function of time.)

6. The energy of the inductor in joules: E = 0.5U 2.

7. The response when the circuit is open at maximum current through L: LcPi / dt 2 + Rdi / dt + it / C = dv / dt.

From this expression it is clear that the energy of the coil must be directed somewhere within a very short time, resulting in an explosive field of energy release E x B.

A powerful impulse of many megawatts in the range of> ttel. i-M. r p1hh electromagnetic wave will depend on the geometry of the design. The large length of g * X’bodz will provide the best characteristics of the magnetic field B, and short squats will form the electric field E to a greater extent. These parameters will go into the equations of interaction of the radiation efficiency of the antenna. The best approach here is to experiment with the antenna design to achieve optimal results using your mathematical knowledge to improve the basic parameters. Damage to the circuit is usually the result of a very high di / dt (field "B") pulse. This is a subject for discussion!

a 0.5 μF capacitor with low inductance is charged in 20 s using the ion charge device described in Chapter 1, “The Anti-Gravity Project,” and finalized as shown. Higher charge speeds can be achieved with higher current systems, which can be obtained by special order for more serious research through www.amasingl.com.

A high-energy radio frequency pulse can also be generated in the case where the output of the pulse generator interacts with a full-sized central-wave half-wave antenna tuned to frequencies in the range of 1-1.5 MHz. The actual range at a frequency of 1 MHz is more than 150 m. Such a range may be excessive for many experiments. However, this is normal for an emissivity of 1, in all other circuits this coefficient is less than 1. You can reduce the length of real elements using a tuned quarter-wave section consisting of 75 m of wire wound at intervals or using two-three-meter PVC tubes PVC This circuit generates a pulse of low-frequency energy.

Please keep in mind, as mentioned earlier, that the pulsed output of this system can harm computers and any devices with microprocessors and other similar circuits at a considerable distance. Always be careful when testing and using this system, it can damage devices that are just nearby. A description of the main parts used in our laboratory system gives Fig. 25.2.

The capacitor C used for such cases should have a very low intrinsic inductance and discharge resistance. At the same time, this component must be capable of accumulating sufficient energy to generate the necessary high-energy pulse of a given frequency. Unfortunately, these two requirements conflict with each other; they are difficult to fulfill simultaneously. High energy capacitors will always have greater inductance than low energy capacitors. Another important factor is the use of comparative high voltage to generate strong discharge currents. These values ​​are necessary to overcome the intrinsic complex impedance of series-connected inductive and resistive resistances in the discharge path.

This system uses a 5 μF capacitor at 50,000 V with an inductance of 0.03 μH. The fundamental frequency we need for a low energy circuit is 1 MHz. The energy of the system is 400 J at 40 kV, which is determined by the ratio:

It is easy to fabricate a coil for receiving a low-frequency radio pulse. The inductance, denoted as L1, is the sum of the stray inductance of the wires, the spark gap, the wire blasting device and the capacitor's own inductance. This inductance enters into resonance in a wide frequency range and must withstand a high-frequency discharge current pulse I. The total inductance is 0.05-0.1 μH. The size of the conductors should take into account the pulse current, which ideally is Vx (C / L) 1/2. In a transient process, current tends to flow over the surface of the conductor due to the high-frequency surface effect.

You can use a multi-turn coil for low frequency dual antenna experiments. Dimensions are determined by the air inductance formula:

Fig. 25.7. Installing a spark gap to connect to the antenna when operating at low frequency

This system is designed to study the sensitivity of electronic equipment to electromagnetic pulses. The system can be modified for use in the field and operating on rechargeable batteries. Its energy can be increased to the level of electromagnetic energy pulses of several kilojoules, at the user's own risk. You can’t make attempts to manufacture your own versions of the device or use this device if you do not have sufficient experience in using high-energy pulse systems.

Pulses of electromagnetic energy can be focused or triggered in parallel using a parabolic reflector. Any electronic equipment and even a discharge lamp can serve as an experimental target. A flash of acoustic energy can cause an acoustic shock wave or high sound pressure at the focal length of a parabolic antenna.

Sources of procurement of components and parts

High voltage charge devices, transformers, capacitors, gas spark arresters or radioisotope arresters, MARX pulse generators up to 2 MB, EMP generators can be purchased through the website www.amasingl.com .

The utility model relates to the field of weapons and can be used to completely and quickly destroy a target of any size, consisting of any matter absorbing radiation at any distance in the line of sight. The technical result of the utility model is

Step 1: absolutely necessary things

The layout of the old camera, whether it is disposable or not, is absolutely necessary. If you do not have it, then it is not so difficult to do, but it will take a lot of time. An alternative way is to use a lock circuit or a separately sold camera flash.

I used the camera circuit 15 years ago. Just pulled it out of the case. The circuit is powered by a 3V battery system.

The reason I used the conventional camera circuit instead of the disposable camera circuitry is because the capacitor in a conventional camera is much more powerful than a disposable one. If you use a separate flash circuit, it is also much more powerful than conventional camera circuits.

Please be careful when removing the chain. A capacitor can still store a charge.

Step 2: Coil

I had to make a coil, which does not take up much space, because it will be fixed in the palm of my hand. If the coil is too large, I can only learn the shock due to the light movement of the palm.

So, I took the coil out of the old SMPS circuit. I had extra copper wires. So I used them to make the coil more powerful.

Make sure that the winding of the copper wire is tight, otherwise it will be ineffective.

Step 3: start the assembly, make the frame

It is necessary to somehow fix the coil at palm level. You also need to be sure of proper insulation to avoid electric shocks.

To provide insulation, I used a metal strip and thick cardboard. After that, I found the antenna of the walkie-talkie, which I fixed on my palm with a tape.

The point of attaching the antenna is to allow the palm of your hand to move freely. It must be flexible so that you can bend your arm properly.

Step 4: Add Vital Elements

Now that the frame is ready, we need to attach the most important part to it - the camera layout. To attach the circuit, I used cardboard again. Also note that I did not remove part of the antenna shell - this will allow me to turn my palm around the wrist. I attached a circuit to this black insulation.

Step 5: Modifying the Frame

The entire structure must be built so that it remains on the arm. Earlier, we attached a metal strip so that the coil remained in the palm of our hand. Now we need to attach another metal strip so that the end part remains motionless on the forearm.

To make this possible, I used a magnifying glass.

Step 7: Connect the Coil

First, connect the wires to the coil correctly. You can solder them. One wire should be attached at the beginning of the coil, the other wire at the end of the coil.

These two wires must be soldered to the two electrodes of the capacitor in the circuit. Do not forget to attach the switch - this is important.

Step 8: Finish

To attach the coil to my palm, I used a yellow electrical tape. The battery holder is attached to the forearm using tape.

Now it's time to destroy something!

I’m telling you how to do something with step-by-step photos and video instructions.