For a long time now, people who are interested in radio electronics have been looking for various diagrams and instructions to assemble some sophisticated device for personal use. I am also among these people. While surfing the Internet, I found an article by the Jammer company called Instructions: How to Make Your Own Cellular Jammer. After reading it and looking at the diagrams, I became eager to do something similar for myself.
Because their instructions had all the information I needed, including diagrams and technical data. I thought of some details myself, and in the end I made my own cell phone suppressor. Below I have described the entire process.
This mobile signal blocker operates on the 800MHz frequency because many mobile phones operate on this frequency. So I used a sweep generator as a VCO. It works just fine, but if you are new to radio electronics, it will be quite difficult for you to assemble such a part without good tools.
The 45 MHz clock generator I used as a jammer drives the on-chip local oscillator port of the receiver. To equalize the resistance of the local oscillator port and the clock generator, the local oscillator signal of the receiver passes through an impedance matching network.
The local oscillator port, which is the RF input, is connected to the 800 MHz antenna, and the RF output is first sent to a special signal amplifier, which increases the output power of the device by 15-16 dBm. After this, the amplified signal is fed to the output antenna.
The frequencies of the received and sent signals of all mobile phones operating at a frequency of 800 MHz always differ from each other by exactly 45 MHz. So when your cell phone blocker is turned on, anyone talking loudly on the phone will only hear their own voice on the phone because their own signal will be returned to him or her.
You should also remember that this mobile phone jammer blocks the signals of tracking devices that use your car's GPS navigation for tracking and cellular frequency to record the received data, in other words, you can also build a GPS jammer. This suppression device can also be used to prevent the explosion of homemade bombs that are detonated using a signal from a regular cell phone.
In this device I used a 600 MHz frequency converter, having previously improved it.
There is no escape from using an RF amplifier, despite the increased power consumption.
I took old aluminum packaging and made a case out of it, and used old VHF connectors from a Motorola phone for input and output.
I soldered the VHF connectors to the chip used.
I used a voltage regulator and a 9V battery to power this mobile signal suppressor. The battery was separated with foam from the rest of the device.
I installed an on/off switch on the case, and screwed the antennas to the VHF connectors (they, by the way, are from the same Motorola).
That's it, your cellular blocker is ready!
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.
There are only three of them:
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. Thus, you can jam all mobile devices within the range of the communication jammer.
In fact, assembling a GSM jammer involves combining several parts together. All you need is:
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 take into account the fact that it is better to buy an omnidirectional antenna, otherwise you will have to point it at the object being jammed, like a remote control at a TV.
And, of course, our DIY jammer will not function without a power source. Typically, 5V DC voltage is sufficient for a mobile phone suppressor. 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.
Typically two types of network adapters are used:
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.
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.
Recently, the Internet community has begun to pay more and more attention to cell phone jammers, 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:
Our experts use the second method, and here's why: spoofing is a 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. You can forget about portable devices.
Therefore, DoS remains the 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:
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:
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. Typically, cell phone suppressors use 5V DC to operate. 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 manufactured for almost all types of mobile phone jammers.
Additional Notes
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!
Today GSM bugs are a bestseller! The most convenient and best option for wiretapping is via a GSM channel. You are in the Canary Islands, a client in the Kuril Islands - you called this GSM bug and are aware of everything!
The scheme is very simple - you don’t need to sit near the client’s office and be calculated, the whole system works where there is cellular communication, and today it is everywhere, such a gsm jammer and noise suppressor for any range of digital signals. We propose a circuit for suppressing a cellular signal in the GSM range.
A homemade jammer circuit for a mobile phone is assembled on an outdated element base, but it is very easy to manufacture and all the blocker element base is available on the markets. Theoretically, the suppression range of this GSM jammer circuit is no more than 7 meters.
Suppressed frequencies 900-1800 MHz. The power supply is from 15 to 20 volts, there is a stabilization chip that supplies the entire circuit with 12 volts. A voltage-controlled generator is assembled using transistors.
GSM cell phone jammer circuit. Phone blocker circuit:
Jammer circuit for GPS receivers (1575.42 MHz)
The GPS jammer circuit provides effective suppression of signals from satellites (GPS) at a frequency of 1575.42 MHz.
The suppression range is 20-75 meters, while the effectiveness of suppression depends on what kind of obstacles are between the car and the satellite (roof, forest, and so on). This circuit is assembled on a frequency synthesizer chip from Motorola.
The signal from which is mixed with the NOISE signal from the LM-386 microcircuit and then fed through a mixer to a preliminary high-frequency amplifier, then through a bandpass filter to the final RF amplifier and then to the antenna. The device is suitable for use in a car when powered by Krona. Operating time from the crown is 10-15 minutes or from the cigarette lighter through a 9-volt stabilizer.
Jammer circuit for GPS receivers (1575.42 MHz):
The circuit is intended for the manufacture of a device for protection against radio bugs. Silencer circuit Provides effective suppression of emissions from low-power transmitters in the range 30 MHz - 1000 MHz. A large number of bugs operate at these frequencies.
Schematic diagram of the suppressor:
Transistors VT1-VT4 require radiators of at least 100 square meters. see each, provided there is good internal ventilation of the case. It is better to replace resistors R1 and R2 with one 4.7 Ohm 10 W power.
Deputy Director for Development Kerimov Rostislav.
www.site
Cell phone jammers, as cellular signal suppressors are commonly called, are an affordable and reliable tool with which you can prevent the leakage of information of varying degrees of significance. In the modern world, a variety of tracking devices have become all too common, making it very difficult to maintain the secrecy of commercial and other information not intended for public review. Mobile phone jammers were created specifically to ensure confidentiality and non-distribution of important data.
Cell phone jammers are also designed to maintain the established order of stay in certain public places: libraries, theaters, cinemas and many others, where visiting rules establish the absence of unauthorized sound signals. "SpetsTechConsulting" offers everyone interested in suppressing cellular signals to purchase mobile phone jammers in various modifications. The cost of the equipment we offer to suppress the signal of cellular operators varies depending on their technical level and capabilities.
Cell phone jammers operate on different frequencies. They can create noise that interferes with the operation of mobile communications. Depending on the power of the noise generator, the range of the equipment to block the signal of cellular operators changes. The more powerful the generator, the more space will be blocked. There are cell phone jammers for use in cars and for rooms of various sizes. Some modifications of the equipment offered by SpetsTechConsulting to suppress the signal of cellular operators can also effectively block data transmission via Wi-Fi.
In the online catalog "SpetsTechConsulting" you can find equipment for blocking GPS signals. For example, the GT-13C model, which belongs to the compact devices from the series of portable jammers. This device, thanks to its external resemblance to a mobile phone, small size and modern design, without attracting too much attention, can provide freedom of movement to its owner by blocking the GPS signal.
Modern cell phone jammers have many modifications and provide various opportunities to their owners. If you are considering the possibility of purchasing a mobile phone jammer, but have not yet decided which one would be optimal to purchase, contact the specialists of SpetsTechConsulting, who are able to advise on a professional level and provide comprehensive assistance in choosing the optimal equipment for implementing a corporate and personal security system. Using modern capabilities provides many benefits to prevent information leakage of varying levels of significance.
