Listening devices schemes. How to independently detect a hidden bug or wiretap in an apartment, office, car or on a cell phone. How to make a detector yourself to detect wiretapping and bugs or a jammer-jammer of radio signals from

For beginner radio amateurs, the following lesson on making a bug may seem too complicated. Transmitter circuits are quite simple, but setting up a radio transmitter circuit can be a little tricky. In this scheme, a minimum of details is used. The transmitter power is not that great, the range is about 100 meters in line of sight. But for a homemade radio bug, this is very good.

We will need

It is not necessary to purchase parts for the circuit. For example, you can pull out the M1 electronic microphone from an old Chinese voice recorder. You can solder capacitors and resistors from any radio receiver board. Remove the VT1 C3013 transistor from an old Chinese transistor player. Coil L1 is easy to make yourself. To do this, take a lacquered copper wire (diameter 0.5 mm), wind its coil to coil on a 3 mm mandrel and bite off the excess with wire cutters. Strip the tips of the varnish. For the antenna, copper wire is also suitable. Just cut off 30 cm from the wire, bend one tip into a ring, clean the second, tin it. Also get a 3V battery. That's all the parts we need.

And here is the diagram, in which only the most necessary details are left, with which we have already familiarized ourselves.

Installation of a radio bug

To assemble the circuit, you do not need to develop the board yourself. Just take a small piece of double-sided foil textolite 2x3 centimeters. On one side of the textolite, cut the foil into a couple of pieces with a cutter (as many as you need to mount the parts). Everything must then be carefully tinned. As you can see, this is not so difficult if you already have a little experience in creating electronic homemade products.

On the second side, cut into two parts - bigger / smaller. Most of it must be made in size so that the battery fits. You will get a positive contact, and for the 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 for the microphone on the board - this will reduce the size of the whole structure.

Now solder all the details according to the scheme. 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 build complete? Now the fun part: insert a battery into the bug, take any FM receiver, try to catch your voice in the speakers. If it didn’t work the first time, try to slightly push the turns of the L1 coil, 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 transmitter frequency decreases, and when moved apart, it increases. Just tune in to the frequency you need and enjoy the work done!

A listening bug is a simple radio transmitter with a microphone that picks up the slightest sounds around it and transmits them through a radio wave. Thus, leaving such a device in a suitable place, you can listen to everything that is happening around it.

You can find many uses for a bug for wiretapping - for example, use it as a baby monitor, wireless headphones, or simply to eavesdrop on someone's conversations (it should be borne in mind that such an application is illegal). If you assemble two radio transmitters, you can organize a wireless connection, for example, between neighboring houses.

There are a large number of bug schemes for listening on the Internet - from the simplest to the most expensive and complex, built on microcircuits. The scheme below is one of the most optimal: it does not require rare or expensive parts to mount the device, but the bug itself will receive a good signal transmission range (up to 500 m) and high stability.

A bug for wiretapping - a diagram and the necessary radio elements

The circuit includes three stages:

1. A microphone audio signal amplifier is built on the VT1 transistor.
2. The carrier signal generator is made on the transistor VT2.
3. Transistor VT3 is a high frequency amplifier, it is he who is responsible for a good transmission range.

The transistors used are:

• VT1 - KT3130B;
• VT2 - KT368A;
• VT3 - KT3126B.

A dynamic or electret microphone can be used to convert sound into an electrical signal. These are sold at any radio parts store. In addition, they can be removed from an unnecessary phone headset, because the necessary microphones are used there.

Coil L1 is wound copper wire on a mandrel with a diameter of 3 mm, 6 turns. The wire can be taken with a cross section of 0.3–0.4 mm. As a mandrel, you can use a conventional drill.

L2 - choke, inductance 100 μH. It is best to use ready. An ordinary piece of wire will work as an antenna, but if there is a need to achieve maximum transmission range, it is advisable to use a wire with a length of one quarter of the wavelength on which the transmitter operates.

• You might also be wondering how to do

A diagram and a printed circuit board for making a bug for wiretapping with your own hands can be downloaded below.

Downloads:

Assembling a bug for wiretapping with your own hands - instructions and photos

The circuit is assembled on a printed circuit board with dimensions of 70x30 mm, the LUT method is used for its manufacture. There is no need to mirror the board before printing. Below are some photos of the process.

After the copper is etched, the holes are drilled, the tracks are tinned, the parts can be soldered. Particular attention should be paid to the microphone, or rather, its polarity. One of its contacts is short-circuited to its body - it is this contact that is negative, it is soldered to the minus of the circuit.

• See also professional

The microphone must be soldered quickly, otherwise there is a risk of overheating it. For convenience, power wires can be soldered directly to the crown battery connector. Assembling the bug is not difficult, if you do everything gradually and take your time, check the correct sealing of each part.

Tips for setting up and a trial run of a bug for wiretapping

For the first start you will need a milliammeter. To control the current consumption, it is included in the gap of one of the supply wires. We connect the crown and look at the readings of the device - the current should lie within 10–30 mA. If it is normal, you can turn on the radio and try to find the signal of the transmitter under test.

Most often, the signal is already in the range of 80-110 MHz. If he "creeped" outside this range and the receiver cannot catch him, you should adjust the L1 coil, compressing and unclenching its turns. The transmission frequency depends on the inductance of this coil. When the signal is found, the coil can be filled with dielectric varnish or epoxy resin so that the setting is not lost.

It is very important to ensure that the broadcast frequency of the assembled transmitter does not overlap with the frequency of any radio station. If they intersect, then you need to change the frequency by adjusting the coil L1. No more tuning is required for the bug, you just need to adjust the broadcast frequency. Now you can test it for signal transmission range, moving away with a pocket receiver farther and farther from the transmitter itself. A properly assembled and tuned transmitter can provide a transmission range of up to 500m in open areas. It should be borne in mind that the reception range also depends on the sensitivity of the receiver. Happy assembly!

A simple bug for wiretapping at a distance of 100 meters with your own hands

Below is the design of a radio transmitter with a range of up to 100 meters. Such a bug is built according to the capacitive three-point scheme (like all other known schemes). The frequency does not float, as it happens in many wiretapping bug schemes. If you stand with the receiver at a distance of 1, 10 and 50 meters from the beetle, then the frequency drift will be only 100-120 kHz - which, you see, is very small and cannot affect the quality of the wiretap.

Below is a diagram of a bug for wiretapping:

This bug can be used to eavesdrop on premises and even moving objects! This became possible due to the selection of transmitter components, which makes the modulated signal quite stable, and the circuit at the same time remains simple and accessible even for a novice radio amateur.

The transmitter can use low-power RF and microwave transistors. It is advisable to use transistors with a cutoff frequency of 700–1000 MHz. The domestic KT368 is perfect (which is a complete analogue of the transistor indicated in the circuit).

To increase the sensitivity of the radio microphone, an additional microphone amplifier was used, the circuit of which was built on only one transistor.

Literally any low-power transistor - KT3102, KT315, KT368, S9014, S9018 and others similar. Such an amplifier makes it possible to catch even a quiet whisper in a room of 16 square meters. m. The sensitivity of the bug is about 5 meters.

Antenna - stranded wire 10–25 cm long in rubber insulation.

The coil consists of 5 turns, wound on a frame with a diameter of 3-4 mm. As a frame, you can use a paste from a gel pen. A wire with a diameter of 0.5–1.2 mm (in our case, 0.8 mm) is suitable for the circuit.

You can take almost any electret microphone, the sensitivity is not very important, since the bug has an additional microphone amplifier.

• Learn also how to make on a chip for an electret microphone

All editing was done on a breadboard, because I did not want to poison the board for the beetle, the performance of which is not yet clear. The resistors are soldered on the back of the board.

To tune to the desired frequency was used variable capacitor, which, after full tuning, was replaced by a constant one (capacity 18 picofarads). By rotating this capacitor, you can tune the bug to the frequency you need.

The beetle operates at frequencies of 96-99 MHz, it is caught on a conventional FM receiver. With a quality bug receiver, you can fish at a distance of up to 150 meters.

Here's what the eavesdropper looks like:

Video on how to make a simple bug with your own hands:

Continuing the theme simple circuits for a radio amateur, consider how to make a simple bug for wiretapping with your own hands. A simple bug can be used not only for wiretapping, but also, for example, for listening to the room in which he sleeps Small child in your absence in this room.

The wiretapping bug scheme has been simplified to the most simple assembly and has a minimum of details. But along with simplicity, the bug has a transmission range of up to 100m. Below is the diagram of the bug itself:

All radio components are common and it is not necessary to buy them in a radio store. The microphone can be obtained from a Chinese tape recorder. Please note that the microphone has polarity, plus the microphone is connected from above according to the diagram. Transistor C3013 can be taken from the same tape recorder or receiver. You can also use its Russian counterpart KT368. Capacitors are taken from there. Coil L1 is wound with varnished copper wire with a diameter of 0.3 ... 0.5 mm. It is wound on a cylindrical mandrel with a diameter of 3 mm, 10 turns must be wound on it. To reduce the size of the element, it is better to buy. The antenna can be made from the same wire as the coil. The length of the antenna must be at least 30cm.

After collecting necessary details you can start installing them. For mounting parts, a double-sided printed circuit board 2x3cm is used. To obtain tracks, the board does not have to be etched; slots can be made with a cutter. The assembled board is shown in the figure below:

Bug board from the battery side:

Setting up a bug for wiretapping

Adjusting the bug comes down to setting the operating frequency. First, scroll through the radio in the FM range and try to catch your voice. If it doesn’t work, we move the turns of the coil apart and catch again. As the coils move apart, the frequency of the transmitter increases. If the transmitter frequency matches the frequency of the radio station, you need to shift it up or down.

I bring to your attention a spy radio microphone with extremely low power consumption. This is perhaps the longest-playing bug of all that I have collected.

Of course, you have to pay for low power consumption with a small range, but for many purposes this is quite enough.

The radio microphone confidently breaks through two reinforced concrete walls, and in open space the range will be from 50 to 200 m (depending on the steepness of your receiver).

The bug circuit is incredibly simple and contains only 6 radio components, not counting the batteries:

Coil L1 - 4 turns with wire 0.5 mm on a mandrel Ø2mm. Choke - 100 nH for surface mounting. BFR93A transistor (the main thing is not to confuse it with the BFR93 p-n-p transistor).

and etched in ferric chloride:

All this took about 20 minutes. Then I irradiated the finished board and cut off the excess:

The most hemorrhoidal business is to connect the battery. I had an old (!!!) CR2032 lithium battery at my disposal (which is usually found in motherboards to power the BIOS chip).

To avoid unnecessary wires, I simply glued a strip of tin from tin can(this will be the negative contact):

The rest of the piece of tin came in handy as a positive terminal:

It is necessary that the battery is tightly inserted into the resulting slot, like this:

It remains only to solder all the parts to the board according to the scheme:

I'm sure it can be made even smaller. Replace the microphone, arrange the parts closer to each other, take small watch batteries and you're done. It will be possible to shove the entire circuit, for example, into the housing from the marker.

I used a wire 6 cm long as an antenna. The inductor was made by winding a thin enameled wire on a piece of toothpick (80 turns).

The microphone, of course, is too big for such a scheme, but I didn’t have another one. In general, any electret with a diameter of 3-10 mm is suitable. Usually they are taken out of any telephone or intercom handsets.

By the way, the circuit does not work without a microphone - power goes through it. It also acts as a current stabilizer.

It is important not to confuse the polarity of the microphone: the negative terminal should ring on the body (for this reason, I put it in heat shrink so that, God forbid, nothing shorted).

The frequency is adjusted by compressing/stretching the turns of the coil. In my case, the bug was caught at a frequency of 424.175 MHz. The signal level at such a distance, of course, rolls over:

If you wind 11 turns on a 2 mm mandrel, then the frequency will be approximately 150 MHz. In general, this bug works up to 1GHz. I didn’t try further, because. nothing to catch.

To test the range, he went outside and walked around the house. Amazingly, in the room where the bug was left, every rustle is perfectly audible.

P.S. This tiny bug worked on a half-dead battery for almost 2 weeks! It's scary to imagine how long it would last on a new one, because the current consumed is only 300 μA.

Continuing the theme of simple circuits for a radio amateur, we will look at how to make a simple wiretapping bug with your own hands. A simple bug can be used not only for espionage, but also, for example, for listening to a room in which a small child sleeps. The wiretapping bug scheme has been simplified to the most simple assembly and has a minimum of details. But along with simplicity, the bug has a transmission range of up to 100 m. Below is the bug itself

. All radio components are common and it is not necessary to buy them in a radio store. You can get a microphone from a Chinese tape recorder. Please note that the microphone has polarity, plus the microphone is connected from above according to the diagram. Transistor C3013 can be taken from the same tape recorder or receiver. You can also use its Russian analogue KT 368. We take capacitors from there. Coil L1 is wound with varnished copper wire with a diameter of 0.3. 0.5 mm. It is wound on a cylindrical mandrel with a diameter of 3 mm, 10 turns must be wound on it. To reduce the size of the element, it is better to buy. The antenna can be made from the same wire as the coil. The length of the antenna must be at least 30 cm. After collecting the necessary parts, you can proceed with their installation. For mounting parts, a double-sided printed circuit board 2 x 3 cm is used. To obtain tracks, the board does not have to be etched, slots can be made with a cutter.

Adjustment of a bug for wiretapping.
Adjusting the bug comes down to setting the operating frequency. First, scroll through the radio in the FM band and try to catch your voice. In the event that it does not work out, we move the turns of the coil apart and catch again. As the coils move apart, the frequency of the transmitter increases. Attention! Only if the frequency of the transmitter coincides with the frequency of the radio station, it is necessary to shift it up or down.

Mini bugs for listening to his wife. Software wiretapping for a mobile phone.

Mini bugs for wiretapping a mobile phone are yesterday. Considering the issue of using radio bugs for mobile devices, one cannot ignore the issue of modern, technologically simpler and more functional software bugs that easily turn functional smartphones for Android, with a semi-axis and other popular OSes, into full-fledged devices that follow the owner.

Software wiretapping for a mobile phone, which you can buy via the Internet on official sites, i.e. without leaving home, is a program that runs covertly on a monitored smartphone. Such spyware collects information about calls from a smartphone, or uses its microphone to listen in on the surroundings. It easily tracks the movement of the subscriber and manages the address book. And that's just the basic functionality of the spyware. They are capable of much more interesting things, while an ordinary bug in a telephone for wiretapping in the form of a printed circuit board is only capable of transmitting a signal from a microphone over a short distance via a radio channel.

So, the spyware collects information from the smartphone and sends it to the server where your computer is located. Personal Area. Thus, you can not listen to the phone’s surroundings from a distance of 150 meters, as you have to do with radio bugs, but from anywhere in the world track and control the owner, always knowing with whom and what he was talking about, and where he was. Here is another such program.

It's not good to eavesdrop. But there are situations when it is necessary to know what is happening in the room of a small child or in the classroom at school. This requires homemade wiretapping, using the most actual way transmission of information - conventional radio waves.

Homemade FM bug

The necessary device can be purchased at the store or ordered on the website. But a quality device will be expensive, and a cheap Chinese product will quickly fail. Therefore, it is more practical and cheaper to make a bug for wiretapping with your own hands.

This is quite achievable. It will take a little ingenuity and skill, as well as inexpensive components and a simple bug scheme for wiretapping. It is not necessary to buy suitable parts in a store; old ones, soldered from electronic equipment, are quite suitable.

Very interesting miniature device for passing exams. Even a beginner can assemble it. It consists of a micro-earphone and a transmitter.

Below is a working diagram of a do-it-yourself listening bug:

1. Transmitter
2. Earpiece.

Scheme of an elementary bug for listening

The advantage of this device is its small size. The earpiece inserted into the ear is completely invisible from the outside. The range of the device is at least 100 meters

Here is a more complex radio bug circuit for wiretapping from a 1.5 V battery and a transmission range of at least 100 meters.

Scheme of a radio bug with a range of up to 400 meters

You need to pay attention to one distinguishing feature plan - a pulse to the antenna is supplied from the electrode of the bipolar transistor, which allows you to stabilize the operating frequency of the device.

Putting together a radio bookmark

It turns out a small and easy-to-make home-made wiretapping, which is easy to hide in an inconspicuous place. However, this model has a small drawback - the antenna is 50 cm long. This is not very convenient if you want to hide the device as much as possible.

Connection of components according to a given scheme

Installing the battery

How to make a radio bug for wiretapping:

1. we cut out a rectangle measuring 53 mm by 75 mm from thin plywood or textolite. It will be based on home-made wiretapping;
2. we will make the L1 coil from a copper wire with a cross section of 0.3–0.5 mm, winding eight turns on a knitting needle with a diameter of 30 mm and leaving the ends 1.0 cm;
3. from the same wire we will weave two two-terminal networks C2 and C3. Each one is 1.8–2 cm in size. We will straighten the upper ends in different directions, we will tin the lower ones;
4. for the inductor, we take a copper wire with a cross section of 0.05–0.1 mm and wrap it tightly on a match. The height of the wrap is approximately 6–7 mm. We cut the match to a length of 1.0 cm, make cuts at the top and bottom, in which we fix the ends of the wire;
5. we make the antenna from a cable 50 cm long in plastic insulation, winding it with a spiral.

You can buy a microphone at a radio store or take it from an unwanted cell phone. To correctly position the parts on the base, you will need a wiretapping bug scheme. Let's transfer it to plywood. According to the drawing, we will make holes for the parts and insert them. On the opposite side, we solder all the details strictly according to the scheme.

Terms of use

Consider how to use a bug for wiretapping. Since the device is transmitting on standard broadcast frequencies, it can be heard by any transistor or cell phone.

After assembling the device, turn on the FM radio and look for the bug signal. It is easy to distinguish it from other FM sounds. Clicks should be heard when turning the handles of the receiver. The loudest sound will be the radio bug signal. Then we set the device to the selected range.

Well, in the end, it must be recalled that home-made wiretapping can only be used as a home toy for covert radio monitoring of an apartment, or as a baby monitor. You shouldn't break the law.

Bug in the car. What wiretap is more often installed in the car?

• Audio control in the car can be carried out by a GSM bug. Its miniature size, the ability to disguise appearance under familiar objects (for example, a flash card) allows you to make it completely invisible. All that is necessary for the eavesdropper is to install a bug, purchase a SIM card, insert it into the device and make the first call. The wiretap automatically turns on, and the car becomes a place of surveillance. An attacker can not only record conversations for a long time, but even track the location of the car.
• Hidden voice recorders require the intervention of an eavesdropper twice - to install the equipment and to remove it. The recorder records all necessary information for a certain time, after which this record along with the device must be taken away. The recorder can also be disguised in any inconspicuous place in the car. The presence of such a recording device is more difficult to find - it practically does not produce any radio waves.
• Video cameras are a way not only of auditory surveillance, but also of visual surveillance. The video camera is not always equipped with a microphone for picking up sounds, but it will always be able to show who the object of surveillance brings up and whom it meets.

It would never occur to many that you can make a small bug for wiretapping at a convenient time for you from an ordinary mobile phone.
Any phone equipped with ordinary buttons (not touch) is suitable for this. The phone that was used as a test subject is a clamshell phone. The phone model is similar to the Samsung A800, but only with a color display. Others suitable models are C315, 113th Motorola, Samsung A800, X100, W200, etc.
Another important detail, without which this project simply cannot be implemented, is a transistor, for example, KT315. But you can use any transistor you can find. It can be desoldered from any equipment of any time of production since the 60s.

To turn a mobile phone into an original bug, you need a board with buttons. To the button, which is responsible for calling and receiving an incoming call, you need to solder the above-mentioned transistor. The emitter of this transistor must be soldered to the minus of the button, and the collector to the central terminal. The base pin is connected to a transistor that provides the display backlight signal.
You can solder as follows:
1. Take the wire and solder one end to the minus of the speaker, and connect the other to the minus from the battery.
2. The same must be done with the plus, but the second end will be used when searching for a signal.
3. The search for the signal must be carried out at the terminals, for example, the headphone jack. During a call with a wire from the plus of the speaker, you need to ring the conclusions until a ringtone is heard.
4. The found output must be soldered to the base of the transistor. This will ensure that the handset is automatically picked up when dialing to this phone.

The LEDs next to the buttons have been desoldered to conserve battery life. There was only an LED to indicate the phone's operability. Also, this LED lights up when a call is made.

The phone is charged through the standard connector. It should not be removed.
The microphone is recommended to leave regular. You should not solder anything for amplification, since there is a possibility of pickup from the high-frequency part.

The antenna is soldered native to its place or from some Motorola, as they have proven reliable antennas.
The headphone/headset jack has been unsoldered and shorted out. But, since you most likely do not have experience in this matter, it is recommended to leave it.

If the phone remains in this form (board without buttons, etc.), then it is recommended to make one button to turn the phone on / off.

As a result, a rather simple and not very large bug for eavesdropping turned out from an ordinary phone. A sort of good spy thing that can be hidden both in the lamp and in the system unit.

Modern mobile technology is firmly entrenched in our lives, and we can no longer imagine ourselves without it. A once ordinary phone has now become a powerful source of all kinds of information that can tell a lot about its owner. It happens that you intuitively feel that a loved one is dishonest with you, but you cannot prove this - access to the smartphone is password-protected. Suspicions torment you day and night, preventing you from living a normal life. In this case, our spy stuff will come to your rescue: a special spy program that will help you control your smartphone and dispel your doubts.

spyware software works discreetly and anonymously: the person whose phone content you control does not even know that they are being monitored.

What can you control

* Intercept SMS. Do you suspect the other half of infidelity? Is there any reason to believe that a loved one is flirting with someone behind your back? or find out cheating wife? This is easy to check. With the help of the software ordered from us, you will get access to text messages that are sent from the phone you are interested in and come to it. Even if the SMS was immediately deleted, you will still see it and be able to read it without any problems.

* MMS messages. As in the case of SMS messages, you will be able to fully familiarize yourself with the message, as well as the text, sound, video files and images.

* Phone calls. Do you think that a business partner is playing some kind of dishonest game behind your back and “leaking” important information to third parties? Catch him hot! Phone spy stuff - all incoming and outgoing calls are made available for your control. Who called the phone you are interested in, from what number, at what time the call was made or received, how long it lasted - this information will not be a secret for you. You can even capture the contents of a telephone conversation.

* Location of the subscriber. You can absolutely accurately track the location of a person. This happens thanks to GPS and communication with mobile towers of cellular operators.

* Access to multimedia content. Text files, videos, photos or audio tracks stored on your phone can be viewed by you when you need them. It is good for parents to occasionally look at the contents of the smartphone of teenage children and check whether they are addicted to what is taboo in the family.

* Internet browser history. Another useful feature for parents. You will be able to see what pages your child visits, what he downloads from the World Wide Web, what traffic he spends daily. After all, you pay for the use of mobile Internet, so you have the right to know what exactly your money is spent on. In addition, spy tricks will help prevent unpleasant stories associated with the placement of personal information on the Internet by a child, which is often used by scammers and scammers in their dark deeds.

* Fixing the on / off device. Thus, the subscriber will no longer be able to refer to the fact that it was not possible to contact you due to a dead battery. After all, you will know that it is not so.

To be aware of what kind of information passes through the smartphone of the person you are interested in, it is enough to order a convenient spy from us, install it on the monitored phone, make elementary settings and conduct surveillance while remaining in the shadows.

The technology of microphones for listening at a distance varies depending on their type. According to the principle of operation, three categories of remote listening devices can be distinguished:

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 directional microphones - 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:

Video Bugs for wiretapping Aliexpress

Before choosing a listening device, you need to ensure your own safety. This is due to the fact that such funds are prohibited for use. You should be as careful as possible. Installing bugs for wiretapping on clothes or other similar devices is fraught with unpleasant consequences. That is why, at the moment, utilities that allow you to make your phone a bug are more popular. Due to the fact that the range of such a listening device depends on the coverage area of ​​the operator, you can listen to conversations anywhere in the world.