A listening device at a distance, unlike bugs. Powerful do-it-yourself radio bug Diagram of a bug for listening with your own hands

The GSM spy radio microphone works as follows: when there is an incoming call, it automatically switches from standby mode (receiving) to transmitting mode and on the receiving side you can hear the sounds picked up by the microphone.

It turns off in the usual way. a radio microphone allows you to listen to a protected vehicle, apartment, cottage, etc. It is especially valuable that the owner can maintain contact with his vehicle and, after it has been stolen, using the “Locator” cellular communication service, determine its location. Of course, GSM radio microphones can also be used for children and other loved ones.

The modern market is literally teeming with offers of GSM devices, but it is more interesting and incomparably cheaper to make them yourself. To create a GSM radio microphone, you can use cheap, outdated models of simple mobile phones, for example Nokia 1110.

If you plan to operate a radio microphone in an area of ​​​​uncertain reception, then it is best to use phones produced in the first years, since in previous years relay stations were located relatively far from one another, and phone manufacturers took measures to ensure that the devices detected the presence of a network at a lower signal level than currently.

Radio microphone bug from an old phone

Let's consider the option of converting a Nokia 1110 phone into a radio microphone. The conversion begins, naturally, with disassembly. This operation should be considered one of the most important, since improper disassembly can lead to damage to the case and even the phone itself. First of all, remove the battery compartment cover, take out the battery and SIM card.

Then, using a special tool or a flat-head screwdriver, release two latches, first in the bottom and then in the middle part of the phone body, and remove the front cover. Finally, use a special screwdriver to unscrew the six screws securing the printed circuit board, remove it and disconnect the display connector. This completes the disassembly.

Now you need to force your phone to automatically answer an incoming call. To automatically close the call key (call or answer a call) when there is an incoming call, you can use the voltage supplied at that moment to the dynamic sound head or to the vibration alert (in the latter case, of course, you need to set the “Vibration alert” mode in the phone).

In both cases, either a transistor or an optocoupler can be used as an electronic key. For example, we use a voltage with an amplitude of E = 4 V supplied to the vibration alert, and as a key, a PC817 optocoupler (U1 in the figure below).

Radio microphone

It is produced in a plastic DIP package with four pins. Such optocouplers are used, for example, in power supplies for computers and televisions.

The main parameters of this optocoupler: typical value of the input voltage U (forward voltage drop across the emitting diode at a forward current of 20 mA) - 1.2 V, maximum permissible input current (I) - 50 mA (per pulse - up to 1 A), maximum permissible output current (collector current of the optocoupler transistor) - 50 mA, housing dimensions 6.5 × 4.6 × 3.5 mm. Analogues of RS817 are K1010, N11A817 and LT\/817. It is also possible to use small-sized domestic optocouplers. To reduce the input current, use a current-limiting resistor R1, the resistance of which is calculated using the formula R1 = (E - U)/I.

For example, with a minimum input current of the optocoupler I = 3 mA, the resistance of the resistor R1 = (4-1.2)/3-10 3 = 933 Ohms (since there is no such rating, we select the nearest standard 910 Ohms). You can place the optocoupler in the place where the vibration alert was located. Pins 1 and 2 of the optocoupler are connected to the released contacts of the vibration alert through resistor R1 (MLT, C2-33 with a power dissipation of 0.125 or 0.25 W), observing the polarity.

How to make a radio microphone from a mobile phone

And its pins 3 and 4 are connected by two thin flexible wires to the contacts of the call key. Secure the optocoupler and connecting wires with Moment glue or varnish, for example, NTs-218.

To ensure secrecy and save energy on your phone, you need to get rid of sound and light signals. The former can be disabled by appropriately setting the phone or removing the dynamic head from it (to do this, simply bend the tabs holding it). As for the LEDs and the display, it is advisable to switch their power circuits. Then, when the power is turned on, it will be possible to monitor the overall performance of the phone, network availability, check the balance and battery charge level, and when it is turned off, the phone’s secrecy and energy saving will be ensured.

The backlight LEDs can be disabled by breaking their power supply, for example, near pin 6 or 7 of the display connector or near the keyboard backlight LED pins at the bottom of the board. However, it is much easier to set the “Backlight Time” mode to “Off” in the display settings menu. Without the display backlight, the image becomes barely visible, but if necessary, you can remove it by turning off the display power. The latter uses miniature contacts, but you can still solder to them. The most convenient way to do this is to cut the printed conductor going to pin 10 of the display connector (Figures 4 and 5).

Radio microphone circuits

When soldering, care must be taken not to overheat areas of the printed circuit board and not to short-circuit adjacent conductors with solder.

Radio microphone bug

To switch the display power circuit, you can use a miniature mechanical switch or reed switch. Using a reed switch is preferable because, firstly, the appearance of the phone does not change, and secondly, the secrecy of the device increases, since to turn on the display it is necessary to bring a magnet to a place on the phone body known only to the owner. In this case, the miniature domestic closing reed switch MKA-07101 is convenient. It can be placed next to the optocoupler, and if the dynamic head is removed from the phone, then near the contacts for connecting it (Figure 2). This completes the alteration.

Assemble the radio microphone in the reverse order. When using the described modification option, the appearance of the phone remains unchanged. In standby mode, it does not respond to key presses and appears to be faulty.

In mobile phones, as a rule, they use low-sensitivity microphones that perceive sounds at a distance of no more than 1...2 m. If necessary, you can replace the microphone with a more sensitive one (they are used, for example, in radio tape recorders) or use an additional microphone amplifier.

Cunning bugs are mainly needed by bosses in order to figure out what their subordinates, husbands or wives are actually doing - to check the fidelity of their spouse and the quality of performance of their duties by nannies or housekeepers. Despite the fact that bugs can be purchased quite easily in specialized stores, you can also make them yourself.

• What do we need
• Operating procedure
• Adviсe
• Interesting to know

• What do we need
• Operating procedure
• Adviсe

Method 1 How to make a simple bug

The wiretapping bug circuit will allow you to receive a signal from a distance of up to 300 meters.

What do we need

• telephone microphone-electret capsule,
• CROWN battery,
• soldering iron,
• epoxy compound,
• used battery casing.

Operating procedure

— we determine one of the contacts on the back board; it will be a minus and he will go to the microphone.
— we supply power through a resistor to another contact. To ensure that the gain is not very large, we can connect a resistance to the circuit, but we must remember that The generator current must be at least 50 Ohms.

— set the frequency at which the bug will operate; for this purpose it is first used trimmer capacitor, and then stretch or compress the turns of wire on the coil.
- collect the bug; This can be done using a battery block; we use the CROWN for power. On the other side of the block we solder a couple of pins on which parts will be hung, including the antenna.
— after completing the assembly, you need to fill everything with epoxy compound, place the microphone in the casing from a used battery and make a hole with a diameter of up to 3 mm.

Adviсe

To ensure that the non-magnetic screen does not lead to an increase in frequency, it is necessary to place the coil further away from it.

Interesting to know

The operating principle of a video bug is no different from a regular radio bug, only it uses a video camera instead of a microphone. Moreover, the quality of the resulting image can be very good - it all depends on the filling of the structure.

In these bugs, the video sequence is fed to a transmitter consisting of one to several transistors.

To conduct the highest quality video surveillance, digital technologies are used, as well as those carried out on the basis of Skype. Making such a device at home is too difficult, and most likely impossible.

Such bugs work automatically, i.e. turn on when they receive a call.

Method 2 Bugs in mobile devices

What do we need

In order for a mobile phone to carry out covert video and audio surveillance and upload the received information to a PC, you need: the mobile phone itself and a program that will allow it to perform this function.

In order for the quality of surveillance and wiretapping to be the highest, it is necessary to use mobile phones with the best technical characteristics, operating on the basis Apple iOS(iPhone) and Google Android(Samsung, Sony-Ericsson, etc.)

Operating procedure

For wiretapping and video surveillance from a mobile phone, certain programs are required. They have a variety of functions: they allow you to quietly take photos and videos, as well as wiretap and transmit received information via 3G/Wi-Fi network to a personal computer in real time. Among such software is spyware SECuRET Spy Cam.
You can see how it works in the video.

It must be borne in mind that the rapid development of spyware will most likely lead to restrictions in the near future on the use of mobile technology in the negotiation process.

For beginner radio amateurs, the following lesson on making a bug may seem too complicated. The transmitter circuits are quite simple, but setting up the radio transmitter circuit can cause some difficulties. This scheme uses a minimum of parts. The transmitter power is not that great, the range is approximately 100 meters in line of sight. But for a homemade radio bug, this is very good.

We will need

It is not at all necessary to purchase parts for the circuit. For example, you can take the M1 electronic microphone out of an old Chinese voice recorder. Capacitors and resistors can be removed from any radio board. Remove transistor VT1 C3013 from an old transistor Chinese player. The L1 coil is easy to make yourself. To do this, take a varnished copper wire (diameter 0.5 mm), wind it turn to turn on a 3 mm mandrel and bite off the excess with wire cutters. Remove any varnish from the ends. Copper wire is also suitable for an antenna. Just cut 30 cm from the wire, bend one end into a ring, strip the other and tin it. Also purchase a 3V battery. That's all the parts we need.

And here is a diagram in which only the most necessary details are left, which we have already become familiar with.

Installation of a radio bug

To assemble the circuit, you don’t have to design the board yourself. Just take a small piece of double-sided foil PCB 2x3 centimeters. On one side of the PCB, use a cutter to cut the foil into a couple of pieces (as many as needed to install the parts). Everything then needs to be carefully tinned. As you can see, this is not so difficult if you already have some experience in creating electronic homemade products.

On the second side, cut into two parts - larger/smaller. Most of it needs to be made in size so that the battery fits. You will get a positive contact, and for a negative contact, take a bent piece of stripped copper wire or a small rectangular piece of a spring (you can take it from a watch). Make a small cutout on the board for the microphone - this will reduce the size of the entire structure.

Now solder all the parts according to the diagram. We solder the negative contact for the battery on the other side, do not forget about the connecting wires for power. Also solder the microphone in the correct polarity.

Setting up a radio bug

So, is the assembly complete? Now the most interesting part: insert a battery into the bug, take any FM receiver, and try to catch your voice in the speakers. If it doesn’t work the first time, try slightly moving the turns of coil L1 apart, then try again. When the signal is caught, you will be able to achieve the desired frequency without any problems: when the turns are shifted, the frequency of the transmitter decreases, when moved apart, it increases. Just tune in to the frequency you need and enjoy the work done!

We have all seen exciting films about special agents who use the most amazing listening devices in their work. It would seem that espionage is beyond the reach of mere mortals in real life. But that's not true. Now you can learn how to make a bug both from the films themselves and from the Internet. And the most interesting thing is that such skill does not require extensive knowledge and skills in radio electronics. Anyone can make their own bug for wiretapping.

How to make a bug out of a mobile phone

• It is better to take an unnecessary or simply outdated phone model. When using the menu, be sure to turn off the sound, display light, and button lock.
• Then the vibration alert is removed and installed in its place by soldering one transistor. It will close the lift button (the handset is shown there) when calling. It will be controlled by a signal from a vibration alert, which, in turn, occurs as if it is automatically raised with further listening. Tip: in order to correctly solder the transistor, you should measure where the minus and where the plus are on the button contacts.
• After this, you need to change the old factory microphone to a Chinese one from a tape recorder. In general, you should choose a more sensitive microphone. It would be a good idea to equip the bug with a battery charge indicator.
• Now you can leave your mobile phone in the required place and call her from another phone. On the bug, “pick up the handset” will immediately work and wiretapping will begin.

Note: the bug is charged using an ordinary charger, only by connecting its plug directly to the charging socket of the mobile phone. It is better to use SMD transistors as a call button contactor. You can see in photographs how to make a bug out of a phone.

A more expensive, but higher quality option for wiretapping is to purchase special programs. For the process of covert video and audio surveillance and uploading the received data to a PC, you need: the mobile phone itself and the program to perform this function.

High quality monitoring and listening is achieved by using mobile phones with excellent technical characteristics, running on Apple iOS (iPhone) and Google Android (Sony-Ericsson, Samsung, etc.).

How to Improve a Listening Device

Having acquired the “GSM telephone bug” program, it must be installed in the memory of the mobile phone. The bug itself will automatically intercept SMS, conduct wiretapping, recognize the location of the phone owner and forward the data to the server. This is the most effective and simplest way to make a bug at home, although not the cheapest.

Note: the information received through such a bug can be transmitted in real time via a 3G/Wi-Fi network to a computer. Similar functions are available for the SECuRET Spy Cam spyware software.

You can watch a video on how to make a bug and make sure that such a device works

Use a narrow-beam microphone, which you can make yourself or buy on the Internet or on the radio market. It’s easy to disguise it – you just need to install it in your phone’s headset.

You can also make a microphone bug according to the scheme indicated. Such a bug will give a signal that can be received at a distance of 300 meters to the player’s receiver.

You can also use a voice recorder for listening. Now there are a lot of different devices, even miniature journalistic ones. The disadvantage of this method is that the number of entries is limited, and this is not always acceptable.

Law

How to make a bug for wiretapping was written above, but please note that in Art. 138.1 of the Criminal Code of the Russian Federation stipulates criminal liability for the illegal production, or sale, acquisition with intent to sell special equipment used for the process of secretly obtaining information.

In addition, Article 137 of the Criminal Code of the Russian Federation provides for criminal liability for the illegal collection or dissemination of various information related to the private life of a person (without his consent), which constitutes his secret: family or personal.

In this article we will look at the main types and mechanism of operation of remote wiretapping devices.

Manifold

Microphone technology for long-distance listening varies depending on the type. Based on the principle of operation, we can distinguish three categories of remote listening devices:

1. Directional microphone;
2. Laser microphone;
3. Listening device through the wall.

Directional microphone

A directional microphone is used for remote listening in open areas and recording telephone conversations. The main problem with directional microphones is the distance to the sound source. Already at a distance of one hundred meters, the sound will weaken so much that it is almost impossible to separate speech from interference.

There are 4 types of directional eavesdropping mechanisms:

Professionals use a whole kaleidoscope of directional listening devices. However, most of this list is not for sale. “Mere mortals” have access to parabolic microphones, which you can buy in special online bug stores.

Laser microphone

Using a laser listening device you can hear what's going on in the room. It reads the vibration of a window in a room. The device sends a laser beam onto the glass. Having reflected from the glass, the laser, altered by vibrations, returns to the device. The device decrypts the signal and we hear the sound.

The range of laser use is up to 0.5 kilometers. You don't have to give away your position to the wiretapping target. Without suspicious bugs, you can listen to any intimate conversation on the phone.

The cheapest laser microphone in Moscow costs about half a million rubles. You can buy cheap homemade versions, however, they will not work correctly. If they work at all.

Listening device through the wall

If you and the target of wiretapping are separated only by a concrete wall, then choose this device. The microphone picks up the slightest vibrations of the wall and converts them into sound. Its operating principle is similar to that of a laser. The only exception is you will have to be at least in the next room.

In order for the device to work correctly, you need to configure the sound. To do this, lean the microphone against the wall and adjust the sensitivity. As soon as you hear understandable speech, you can use it.

The device for direct wiretapping through the wall is cheap. You can buy it in special bug and phone stores for about five thousand rubles.

We looked at the types of listening devices at a distance. You have probably already chosen for yourself what type of device to replace the notorious bugs with. In the next paragraph we will look at popular models of listening devices.

Market favorites

Parabolic microphone Super Ear 100

As with all parabolic devices, it uses concave parabolic plate made of plastic. This device comes with headphones and binoculars with 8x magnification. The built-in voice recorder allows you to record short conversations. You can connect headphones so that nothing interferes with listening to the target.

A microphone with a dish allows you to listen to a conversation at a distance of up to one hundred meters. With up to 70dB of audio amplification, the Super Ear 100 is extremely sensitive, and you can set it to a maximum output of 105dB to record any phone conversation.

This beauty is powered by a 9-volt “crown”, which will live 55 hours. Weighs a little over a kilogram. Thanks to its durable design, it is able to listen to the environment and phones in any frost or heat.

The price of Super Ear 100 ranges from 3,500 to 5 thousand rubles.

Yukon directional microphone

Like the previous copy, can pick up sounds from a hundred meters away. However, it does not have a special cymbal and is smaller in size than a stage microphone. Battery life is up to 300 hours.

The wind will not be a problem with it, since the Yukon is equipped with a modern noise reduction system. You can adjust the volume and sound strength yourself.

The microphone can be attached to binoculars, a spotting scope, or a camera. It will be convenient for you not only to listen to the target, but also to observe it. There is also a tripod mount.

This device is eagerly used reporters and cameramen in sound studios, because it won't be difficult to record professional-quality audio.

Yukon price - from 4200 to 6 thousand rubles.

Conclusion

We looked at listening devices that can replace bugs. A person of any income and profession can afford them. In this case, you do not need to be close to the target, and the bug will not arouse suspicion.

However, remember that illegal espionage is a criminal offense. You can end up in not-so-remote places for a long time only for installing a bug or recording a secret conversation without the consent of the target and the law. So make sure you don't break the law. Let your conscience guide your actions.