How to make a cell phone jammer. How to make your own mobile jammer

Instructions

Buy a regular signal jammer; these can be purchased at radio equipment sales points in your city. Find out the frequency of the waves you need to suppress and program this device. It can be various navigators, antenna signals, radios, telephones and so on.

In order to assemble the jammer yourself, use the following diagram: http://samodelnie.ru/skhema_glushylki.jpg. In this case, you can suppress any television and radio signal within a range of up to 10 meters. Please note that very powerful signal suppression devices can damage equipment.

When assembling a signal suppression device yourself, please note that the loop coil L1 should not be on the same axis with the inductor L2 and should be removed at a distance exceeding 2 centimeters. As an antenna, use a piece of wire 20-40 centimeters long.

When setting up, it is best to have a dielectric screwdriver in your tool kit. The inductor in this case should have about 10 turns, and the wire should have a diameter of 1 millimeter. Its frame should be 10 millimeters, and the choke should be wound around an MLT 0.5 resistor. Its rating is 100 Ohms, and the wire should have a diameter of 0.1 millimeters (100 turns).

When using this device, please note that if you use it to interfere with someone else's equipment, you may be subject to legal action. If your neighbors disturb your sleep with a loud radio or TV, use legal accessible ways response: just call the police. According to the legislation of the Russian Federation, it is unacceptable to violate the silence regime after 23:00 in the evening. If you are sued for using a jammer, you will not only be required to pay a fine, but your equipment will be confiscated.

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note

There is a fine for using such funds.

There is nothing difficult in assembling a phone, but only if during disassembly you did not damage any of the parts of the device, in which case it is best for you to contact specialists.

You will need

• - thin flat screwdriver;
• - a mild table knife.

Instructions

Disassemble your phone by first turning it off and removing the battery. Unscrew all visible fasteners, pull out the special plugs and unscrew the bolts under them; this is very often found in clamshells. After that, proceed to open the phone case. Pry it on one side, and then on the other. Try to use less force as you may break the housing mounts.

Please note that some phone models can be held together using special glue; here you will need a mild knife or a thin flat-head screwdriver. Place the phone on its side in a stable position (it will be better if someone helps you), place a screwdriver or knife along the line of connection between the parts of the phone case and lightly hit the tool with the palm of your hand, as soon as you feel that the phone opens, separate the parts using the knife.

After opening the case, remember the order in which you disconnected the phone parts. Try not to damage the connections between the wires and cables of the screen and the microcircuit. In order to remove the circuit, unscrew the bolts, usually located on the sides and in the center. Be careful, if your phone has Wi-Fi functionality, it's best not to disconnect the modem unless absolutely necessary. The same applies to the phone camera.

Be careful when removing the speaker - it is usually soldered to the internal circuit board of the phone, so during reassembly you will have to somehow restore its position. Remove the keyboard, disconnect the fastenings of the remaining internal elements of the phone.

Reassemble the phone in reverse order. To better remember the sequence, record a video of the disassembly, or simply write down your actions on paper.

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Helpful advice

Do not use regular kitchen knives to open your phone.

Assembling any phone is carried out in the reverse order of the procedure for disassembling it. Before disassembling your mobile device, read the terms and conditions specified in the warranty card, and also read the technical documentation regarding your model.

You will need

• - a small Phillips screwdriver;
• - a thin flat screwdriver or a mild knife.

Instructions

Prepare work surface in such a way that it is convenient for you to disassemble the phone without losing its small parts, and also so as not to damage the internal devices. Choose a screwdriver that is sized to fit the screws on your phone, because if it is larger than the sockets of your phone's screws, you may damage the fasteners and then you will have to replace them.

If you have a camera with a video recording function, record the disassembly process so you don't forget the sequence later. If you do not have this opportunity, simply write down the process step by step on paper and sketch the device connection diagrams, if necessary.

Turn off your phone, open the battery cover and remove the battery. Take out the SIM card and removable storage. Unscrew all the existing screws from the back wall of the phone; note that in some models they may be hidden under special service stickers. After this, carefully pry off part of the body of your mobile device using a flat-head screwdriver or a mild knife, or best of all, use a plastic card.

If necessary, carefully detach the camera from the back of the case. After removing the phone case, carefully examine its contents. Unscrew the chip, disconnect the phone's keyboard, and don't forget about the side buttons for locking the device and adjusting the sound level. Remove the keyboard buttons by pushing them in from the outside.

Reassemble your mobile device in the reverse order, paying attention to the size of the screws matching the threads of the case. Be sure to secure the screws on the internal devices of the phone to prevent them from breaking the next time your device is dropped. Insert the SIM card, replace the removable drive and battery. Close the phone cover and check its operation.

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Helpful advice

Before disassembling the phone, cover the surface with a light cloth so as not to lose small parts.

If you're tired of the noise your neighbor's radio makes, or you want your child to turn off the radio and sit down to do his homework, you might want to mute or reduce the signal reception. The person will turn off the receiver himself.

Instructions

Take the KR555LA3 microcircuit and solder the signal jammer using a soldering iron, tin and solder on it. Use the diagram below. Use 2 batteries of 1.5 each as a power source. This device will perfectly drown out any signal.

Try purchasing and using a portable stun gun. The stun gun easily creates quite powerful interference. However, they are not directional in nature, and it is difficult to constantly activate its work.

Try using a noise generator from a simple electric lighter to gas stove. It, like a stun gun, creates strong interference, covering a wide range of radio frequencies. An ordinary radio becomes practically useless. It also has a non-directional effect, and also has a very strong effect on the entire electrical network. Thus, you will interfere with all your neighbors, and your television and radio will not have good signal reception. Use caution as electric shock can be very unpleasant. You can screw a regular wire to the lighter, which will act as a transmitting antenna.

A portable signal jammer can always be made from a regular gas lighter with a piezoelectric element. The disadvantage is that you have to press the button constantly. To enhance the effect of this generator electrical interference, attach a piece of ordinary wire to one of the electrodes that are located next to the piezoelectric element. The interference will not be strong, but the constant clicks that will be heard through the radio speaker will force it to turn off.

Total tracking of cars has now become widespread, since all domestic cars come off the assembly line with a built-in GLONASS system. This is done in order to use the system while driving or stealing, but it is still tracking each person.

To cope with the problem of unwanted tracking, you will need a GPS jammer that can suppress the navigator and interfere with its operation. Such a device can be purchased at an electronics store, or you can create your own new gadget yourself if you have basic knowledge of radio engineering.

Stationary option for indoor installation

This sample will easily fit in your pocket

The device consists of the following parts:

1. generator;
2. antenna;
3. scheme;
4. amplifier.

A voltage control generator that allows you to eliminate system overvoltage and save the circuit from burning out. Additionally, it serves as a current amplifier, maintaining system functionality even with a weak power source.

Antenna. This device uses different types of transmission parts, but preferably SMA or OMNI, which give the largest coverage area and can operate in civil band frequency

Amplifier. Part of the circuit responsible for supplying a more powerful and, accordingly, understandable signal.

Customized circuit. This part includes the generator and the core coil. The first creates oscillations, which are subsequently transferred to the coil. In order for the gadget to work correctly and not jam cellular communications, you will need to wind the correct number of turns, equivalent to the frequency. The choice of core will determine how long the device can last and the gain.

The design also contains other elements that allow it to operate in different modes:

1. interfering with the operation of tracking devices, allowing you to hide a car or mobile phone from radar screens;
2. changing a valid signal so that it shows false information. For example, the screens will show a different street location.

Such gadgets are much more difficult to implement due to the presence of a special processor.

Features of creation and configuration

The GPS jammer you create yourself must fully correspond to a similar factory device. To do this, you will need a GPS jammer circuit, which is a small cascade that includes transistors and diodes.

GPS jammer circuit:

Simple frequency jammer for jamming GPS signal

Capacitors and resistors can be created using current mirrors and other replaceable circuits. Thanks to this substitution, it is possible to reduce the size of the gadget and its cost.

The most important point is the setting, which helps to get rid of problems such as jamming of other signals, for example, 3G or Bluetooth. To prevent frequencies from mixing, it is best to adjust the inductor, on which the emitted frequency depends. This action is performed by changing the number of turns on the core.

To more accurately determine the turns, you will need to use a special formula showing the relationship between frequency, inductance and windings.

Thompson's formula. Determination of the resonant frequency v - frequency, L - inductance of the coil, C - capacitance of the capacitor

Additionally, you will need to arrange the operation of the amplifier. This unit will be able to show how strong the signal will be, which may not give the desired effect when the device is operating.

In some cases, it is best to reduce the gain, thereby reducing interference from third-party communication sources. Adjustment of this indicator involves experimental manual setting amplifier, simultaneously checking the operation of the entire complex and its impact on tracking devices.

The antenna is a part that does not require tuning, but you need to be more careful in choosing it. According to the recommendations of radio amateurs, the right solution would be to install SMA antennas that radiate the signal in all directions and give the best gain.

SMA connector options

The appearance of the SMA antenna can be almost any

The GPS jammer is also made from other types of transmitting parts:

1. whip antenna;
2. log-periodic;
3. panel, used on an industrial scale.

Depending on the coverage area, there will be a choice between the number of antennas to be installed. If you need to get results within a couple of meters, then only 1 piece is used, while in some structures up to 4 pieces are installed. The latter is much more difficult to do on your own, since you will need additional conclusions with contacts and distributor for both signal and voltage.

Before receiving permission for installation, you will need to undergo inspection and testing. Of course, a homemade GPS tracker jammer is not able to obtain the appropriate permission, so it is best to use it unofficially.

Since the device has low power and is used only in the civilian range, it cannot be tracked. The main problems will arise if a driver, under close surveillance of the employer, is caught with such a device, this can lead to a large fine or even dismissal.

Each person decides to buy a device himself or create it himself. If you use existing circuits, it is possible to get a really high-quality gadget at minimal cost. Despite the lack of permits and certificates, the device can be configured specifically for you and your situation.

Today, communicating with each other has become much easier, thanks to the emergence and widespread distribution of mobile phones. But, on the other hand, such a development entails many unpleasant moments. And in order to avoid all sorts of surprises, they came up with special devices that have now become available not only to intelligence officers, but also to ordinary people. These are so-called suppressors or jammers. With their help, you can not be afraid of hidden video cameras, wiretapping, “bugs” and similar “things” that are available to everyone today.

Suppressors can be purchased, for example, via the Internet. And radio amateurs make them themselves. How these devices work, what they are capable of and how to make a GSM jammer with your own hands will be discussed in the next article.

How do cell phone jammers work?

Some of them are devices of such a type that when the devices fall within their range, all the phones around them only pick up interference, and people cannot talk on them.

Other GSM jammers are aimed at scanning frequencies and looking for a specific signal. The moment he appears, they begin to generate interference. Thus, electrical energy is significantly saved.

Devices may have different ranges. Some of them do not spread more than ten meters. They are perfect for a small office or car.

More serious models have a range of about fifty meters. They can be used, for example, in conference rooms or meeting rooms.

But there is also a device with a huge range. It can spread interference over entire areas. Of course, only special services have access to such a GSM jammer.

The diagram presented below will help you construct a device with your own hands.

Suppressors and the law

Nevertheless, it must be borne in mind that, according to Russian federal law“On Communications”, all communication blockers are subject to mandatory registration and certification. The certificate is issued by the device manufacturers themselves upon purchase, but the device owners are responsible for the registration procedure. If it is not passed, then operating the device is an illegal act for which you will have to bear responsibility.

But thanks to such devices, you can protect yourself from various spying devices that aim to invade your privacy. It is sometimes impossible to detect them due to their miniature size, but GSM jammers can cope with the task.

Suppressor Installation and Operation

Installation of the device is completely simple. The antenna is screwed into the connector, and the jammer will suppress the signals within ten seconds after switching on. The blocker is able to work both in and through the network. You can also use the car's cigarette lighter if necessary.

But we should not forget that illegal use of the device is a violation of the law.

Fine tuning

It happens that after the GSM jammers have been charged, turning on the devices, they discover poor performance, the effect extends only to a certain telecom operator, or something else similar. This happens if operators use slightly different frequencies.

But in order for the device to work with them, it is necessary to perform the following actions:

• remove the switch;
• unscrew the antenna;
• remove the cover;
• pull out the microcircuit;
• turn the trimming resistor on it with a screwdriver to increase or decrease the frequency.

Who needs to invade someone else's life?

Similar steps are taken to set up WiFi.

Probably everyone knows today what “bugs” are. Various means of wiretapping are currently used not only by intelligence services. They can be installed by a student or even a schoolchild.

However, most often jealous people, business competitors and others are interested in such devices. Spy technology can harm anyone. That's why information protection Many people are interested today. And the GSM jammer is precisely the device that combats such phenomena.

Well, many have long known about GSM 900-1800 cell phones that without a jammer they can easily turn into a means of information leakage.

Bluetooth, 3G, Wi-Fi jammer

Such a device is usually invisible and operates at certain frequencies. At the same time, on cell phone When the device is operating, something like “network not found”, “no signal”, etc. is usually displayed. And if it is installed with some kind of device, then after a few seconds it is interrupted. Then no spyware will be able to eavesdrop and pick up signals.

GSM phone or Wi-Fi jammers do not emit powerful noise or radio signals. Therefore, household devices both worked and continue to work.

Highly sensitive spy equipment can be installed anywhere: in offices, cars, apartments, saunas, and so on. Communication occurs at certain frequencies. Conventional detectors often fail to cope with the task and are not able to “compute” modern spy technology. But jammers, developed taking into account increased conditions and requirements, can “neutralize” space.

GPS jammer and anti-tracker

In recent years, another type of spy technology has become widespread: GPS trackers. They are not intended only for monitoring cargo transportation, as manufacturers often claim. They are often used by law enforcement agencies, private detectives, and the same envious competitors, even criminal structures.

These are absolutely miniature devices that are easy and simple to hide. And as a result, a certain person will be under such automated surveillance. That is why a GSM signal jammer, a kind of anti-tracker, began to be developed.

These are certain modules that do not allow one to calculate the coordinates of a person or vehicle. Anyone who monitors using a tracker will only see “no data”, or the data will not reach him at all.

Thanks to the suppressors vehicle Anonymity is ensured and personal information is not collected via GPS channels.

The devices are capable of successfully combating all kinds of spy technology, which can harm any person in his personal life, in the business sphere, as well as an entire organization. Therefore, in our realities, such things cannot be neglected, and it is necessary to try to protect yourself, your loved ones and employees from spy gadgets.

DIY GSM signal jammer

You can find instructions on how to assemble the devices yourself.

One of them is given below.

The suppressor is capable of resisting a signal at a frequency of 800 megahertz - most mobile devices are tuned to this frequency. The control generator here is a rocking wave generator. The device works great, but its assembly certainly requires certain skills.

Signals are taken at forty-five megahertz. The local oscillator port responds to it. The result is interference. The resistance in both the local oscillator port and the generator is equalized by directing the signal from the receiver's oscillator.

The port of the last generator has an 800 megahertz antenna configured. The RF output is connected to an amplifier, increasing the power of the device to sixteen dBm. After this, the increased signal reaches the antenna.

The inside of the GSM jammer is made from:

• tuning circuit;
• antennas;
• amplifier stage;
• source of interference.

Jammers operate at different frequencies depending on the need to interfere with certain communication devices.

The VCO can be considered the “heart” of the entire device. It produces an RF signal. An RF amplification unit will be needed to expand the coverage area of ​​the device. The tuning scheme comes with feedback and open. Sold in a variety of capacities. But it should be understood that with higher power the operating time will decrease. signals generated by the suppressor. The power supply keeps the device alive. It can be used as a lithium ion battery. But if you will be using a regular power source, be sure to purchase an AC adapter.

These are the means today that we have to deal with the side effects of those inventions that, perhaps, were intended for completely different, good and useful purposes.

Recently, the Internet community has begun to pay more and more attention to jammers cellular communications, especially how to make one yourself. The Jammer company and our team of specialists could not stand aside and decided to create their own instructions for you. But do not forget that creating such a complex device is quite difficult and requires certain skills and experience in the field of electronics.

3 Suppression Methods

First of all, you should know that there are three ways to jam mobile signals:

• Spoofing(a false signal is sent to the mobile device and its operation is disrupted)
• DoS attack(denial of service when the signal is blocked by radio interference and cannot be received or sent normally)
• Electromagnetic shielding(the object is protective screen, which does not allow incoming or outgoing signals to pass through)

Our experts use the second method, and here's why: spoofing is good method, but requires precise adjustment and control, and it will be quite difficult for an inexperienced user to operate such a device. Electromagnetic shielding works great, but it is tied to one location, i.e. O portable devices you can forget.

Therefore, DoS remains best choice due to the ability to jam all mobile devices of selected frequencies within the suppression radius of the communication jammer used.

Assembling the Parts

To make a cellular jammer, you will need to combine some parts into one whole. Here is their list:

• Voltage Controlled Oscillator (VCO)
• Tuning Circuit (to select the desired frequency to suppress)
• Noise Source (usually built into the Tuning Circuit)
• RF Amplification Block (the so-called “amplifier stage”)
• Transmit Antenna

VCO is the most important part. He is like the heart of your jammer. The VCO produces an RF signal that will interact with the device being blocked. First of all, you must select the frequencies that will be used by your suppressor. Here is a list of the main communication standards:

• AMPS (800MHz)
• PCS (800MHz, 1800MHz and 1900MHz)
• GSM (850MHz and 1900MHz in America, 900MHz and 1800MHz in Europe)
• GPS (main civil frequencies 1227 MHz and 1575 MHz)
• Wi-Fi/Bluetooth (2400MHz - 2500MHz)
• RFID (also known as UHF/VHF, 14MHz - 400MHz, 800MHz and 2450MHz)

You also need to think about the size of the future jammer, since you can create a portable cellular jammer or a desktop cell phone blocker.

Tuning Diagram can be of two types: open-loop and closed-loop. The open-loop circuit is quite simple and requires only a few components and additional passive components. The ramp generator causes the VCO to go from low to high frequency. The closed-loop circuit uses a PLL to adjust and hold the VCO frequency at the same level. For this purpose you need to use a microcontroller. It is programmed once and connected to the VCO, so it is not configurable.

RF Gain Block– this is what you need if you want to expand the coverage area of ​​your jammer along with the signal strength. The more power your signal suppressor has, the wider its suppression radius. The price for this is, as you probably already guessed, the operating time of the device. More power equals less battery life.

There is a fairly wide selection of amplifier stages on the electronic components market (7dBm, 17dBm, and even 20+dBm). However, it should be borne in mind that the greater the power, the shorter the operating time of the device.

Transmit Antenna- This is the device that transmits the signals that your suppressor generates. The main characteristic of the antenna is VSWR (Voltage Standing Wave Ratio). If your antenna's VSWR is three or lower, then this is it, because the return loss of this antenna is minimal.

Jammer specialists use SMA antennas, as they are very easy to remove or replace. It's also worth mentioning that omnidirectional antennas are preferable if you don't want to constantly point your jammer at the jammer, like a TV remote.

Power supply maintains the vitality of your creation. Mobile phone suppressors usually use 5V to operate. direct current. Therefore, you can use a lithium ion battery as the power source. If you are using a regular power source, you will need an AC adapter. The mains adapter can be of two types: a controlled capacitor voltage doubler or an inductor switching boost regulator.

The first is simple and effective, but cannot be adjusted, so you will need an MPN regulator to adjust the voltage. The second is adjustable, but it is more expensive, more complex and requires precise selection of all components for stable operation.

Our production team uses switching regulators for our creations. It takes more time and labor, but the result is worth it. AC/DC adapters are produced for almost all types of jammers mobile communications.

Additional Notes

• Signals from older mobile devices are more easily rejected due to their lower operating power. Accordingly, they will be jammed at a greater distance than newer mobile phones.
• More powerful signal jammers usually have cooling systems installed to prevent malfunctions.
• If you have enough skill, dexterity and experience (and the necessary equipment), you can use a programmable PLL with a microcontroller to make your cell phone jammer adjustable.

And finally

Well, did you like it? Now you have an idea Which The work is done by our respected research and manufacturing experts to invent, develop, create and manufacture this variety of reliable cell phone jammers for your use.

The world of electronic gadgets is a huge and interesting place! He has something to show and something to surprise. It can help us enjoy modern, useful, and simply cool things.

And he will be glad To you like its new part!

The Internet community is increasingly interested in creating a DIY cell phone jammer, and in particular, many want to learn how to make such a device themselves. And many sites satisfy this curiosity by providing their own variations of schemes. This article also contains instructions from which you can learn how to create your own GSM jammer with your own hands. The main thing is not to forget about the complexity of the process of creating such a device. In order to create GSM jammers with your own hands, you need certain skills in working with electronics.

What are the methods of suppression?

There are only three of them:

1. Spoofing - sends a false signal to a mobile device, which disrupts normal operation.
2. DoS attack - overlap GSM signal interference, making it very difficult to receive or send signals.
3. Electromagnetic shielding is enclosing an object in a protective shell that keeps any signal within its coverage area.

To create a mobile phone blocker with your own hands, it is recommended to use the second method. Spoofing is too complex for the average user to use such a device. And the electromagnetic screen cannot be moved from its place, so the possibility of mobility is completely excluded. This is why it is best to use a DoS attack. This way you can mute everything mobile devices within range of the communications jammer.

In fact, assembling a GSM jammer involves combining several parts together. All you need is:

1. Voltage Controlled Oscillator (hereinafter referred to as VCO).
2. A circuit that allows you to select the desired suppression frequency.
3. An interference source that is usually already built into the circuit.
4. Frequency amplification unit (amplifier stage).
5. Antenna.

The VCO is the most important part of the GSM jammer, which you will create with your own hands, it can be said to be its heart. It produces a signal that affects certain devices, blocking their operation. In order to determine what frequency to tune the generator to, you need to know the exact frequency at which the device being jammed operates. This will help improve efficiency, although the jammer will create problems even when operating at just a close frequency. Think in advance about the size of the suppressor you plan to create with your own hands. This could be a portable cellular jammer, or a DIY desktop cell phone blocker.

The tuning circuit can be open-loop or with feedback. It is much easier to make an open-loop system, but closed-loop systems have their advantages. The first scheme uses sawtooth oscillations from lower to higher frequencies. The second circuit uses a PLL, which allows you to maintain a stable frequency of the generator. In the second case, you will need to use a programmed controller, which must be configured correctly, because later it will be impossible to configure.

To expand the frequency jammer's coverage area and its power, it is necessary to use a frequency amplification unit. As the suppressor power increases, the suppression zone will expand, but at the cost of operating time. The more powerful the device, the faster the battery will drain. This feature should be taken into account when choosing an amplifier stage model.

The antenna transmits the signal generated by the suppressor. The antenna is characterized by its Voltage Standing Wave Ratio (VSWR). It is best to choose an antenna with a VSWR of 3 or lower. In this way, the antenna return loss can be minimized. It is best to use SMA antennas, which can be easily replaced with others or removed. Also consider the fact that it is better to buy omnidirectional antenna, otherwise you will have to point it at the object being muted, like a remote control at a TV.

And, of course, our DIY jammer will not function without a power source. Usually 5V is enough for mobile phone suppressor DC voltage. You can use a regular lithium ion battery. In order to be able to use a standard power source, you will also need an AC adapter.

Usually used network adapters two types:

• Capacitor voltage doubler. This is a fairly effective and easy-to-use device, but it also has some disadvantages. Due to the lack of ability to adjust the adapter, you will also have to use the MPN regulator, otherwise it will be impossible to adjust the voltage.
• Inductor pulse stabilizer with boosting action. It can be adjusted, but it also costs slightly more than the first option, in addition, it is more difficult to operate. For its stable operation, all components must be selected perfectly.

Despite the high cost, as well as the difficulties that arise, it is still better to use a pulse stabilizer. The time and financial costs are completely worth it. AC and DC adapters can be found for almost any mobile phone jammer.

Notes

Signals from older models are easier to suppress because their operating power is lower. Therefore, the range of action of the jammer will expand significantly. But, new mobile phones are somewhat more difficult to jam.

For powerful GSM jammers, it is worth installing cooling systems so that they do not overheat.

Having sufficient skills, dexterity and experience, as well as having access to the necessary equipment, you can program the PLL system, this will allow you to regulate the operation of the jamming device.

Actually, that's all. All the basic information that is needed in order to understand exactly how a GSM jammer is created is indicated.

To purchase portable jammers, you need to go to the appropriate section of the site.

Deputy Director for Development Kerimov Rostislav.