Powerful bug. How to independently detect a hidden bug or wiretapping in an apartment, office, car or cell phone

I bring to your attention a spy radio microphone with extremely low power consumption. This is perhaps the longest lasting bug I have ever collected.

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

The radio microphone confidently penetrates 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's circuit is incredibly simple and contains only 6 radio components, not counting the battery:

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

and etched in ferric chloride:

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

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

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

The remaining piece of tin was useful as a positive terminal:

The battery must be tightly inserted into the resulting slot, like this:

All that remains is to solder all the parts onto the board according to the diagram:

I'm sure it can be made even smaller. Replace the microphone, place the parts closer together, take small watch batteries and you're done. It will be possible to stuff the entire circuit, for example, into the body of a marker.

I used a 6 cm long wire as an antenna. The choke 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 circuit, but I didn’t have anything else. In general, any electret with a diameter of 3-10 mm will do. 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 into the body (that is why I put it in heat shrink, so that God forbid, nothing short-circuits).

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

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

To test the range, I went outside and walked around the house. Amazingly, in the room where the bug remains, every rustle is clearly 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 consumption is only 300 µA.

Continuing the topic of simple circuits for a radio amateur, let's look at 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 a room in which a small child is sleeping in your absence in this room.

The wiretapping bug circuit has been simplified to the simplest possible assembly and has a minimum of parts. But along with its 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 do not have to be purchased at a radio store. The microphone can be taken from a Chinese tape recorder. Please note that the microphone has polarity, the plus of 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 KT368. We take the 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, it is better to buy an element. The antenna can be made from the same wire as the coil. The length of the antenna must be at least 30cm.

After collecting the necessary parts, you can begin their installation. To mount the parts, a 2x3cm double-sided printed circuit board is used. To obtain tracks, the board does not have to be etched; the slots can be made with a cutter. The mounted board is shown in the figure below:

Bug board from the battery side:

Setting up a bug for wiretapping

Setting up the bug comes down to setting the operating frequency. First, we scroll through the radio in the FM range and try to catch our voice. If it doesn’t work, we spread the coils of the coil and catch again. As the turns move apart, the frequency of the transmitter increases. If the frequency of the transmitter coincides with the frequency of the radio station, it is necessary to shift it up or down.

On the Internet you can find a huge number of radio bug circuits. Some circuits are too complex and require configuration, others include scarce radio components, and still others don’t work at all!
I bring to your attention a diagram of a bug that can be assembled by both an experienced radio amateur and a beginner in this matter.
Let's look at this diagram:

Ignore the dotted line for now.
To make a bug we will need the following parts:

• VT1 - kt315 with any letter index (if you want to increase the range of the bug, it is better to use a microwave transistor, for example kt325 or kt368, the imported transistor s9018 is perfect);
• C1, C4 – 47...68nf;
• C2, C3 – 10pf;
• R1 – 33 kOhm;
• R2 – 100 Ohm;
• Oscillatory circuit L1 - 8 turns of copper wire with a diameter of 0.3...0.5 mm on a rod from a helium pen, wind carefully, turn to turn (I unsoldered the finished coil from a broken radio).
• M1 – electret or condenser microphone.

To save space, I used the right microphone (I found it in an old cell phone). Despite its size, it turned out to be very sensitive.
All parts except the L2 choke and microphone are shown in the following picture:

To make L2 we need a match and very thin wire:

We measure one and a half centimeters of matches, bite them off - this piece will serve as the core of the choke. Next, take the wire and wind one hundred turns. We fix the terminals of the resulting coil, clean it of varnish, and tin it. That's it, throttle L2 is ready!

When all the parts are assembled, you can start making the printed circuit board.
To do this, we need a 35x15mm piece of PCB and the solution itself in which we will etch the board (I used hydrogen peroxide + citric acid). Making a drawing of the printed circuit board (I drew it for the s9018 transistor)

and transfer it to the textolite.

Place the board in the solution and wait until the excess copper disappears.
After the board is etched, we take it out, rinse it with running water, remove the varnish and tin it:

Next, solder the parts in accordance with the diagram. Attention, when installing parts on the board, do not overheat them, otherwise they will fail! Be especially careful when installing VT1.
I would like to say a few words about connecting the antenna; the signal is supplied to it from the emitter of the transistor, which makes the operating frequency of the bug more stable.
Assembled diagram:

The bug can be powered in the range from 1.5 to 9 volts.

Any of these batteries will be suitable to power the circuit. I used a AAA AA battery to make the bug more compact. You can also use a 3-volt “pill”.
If you will power the circuit from the crown (9 volts), then you should include a 100 Ohm resistor R3 in the circuit.
Carefully solder the battery to the bug. An insulated wire 30 cm long can be used as an antenna, but practice has shown that its absence will not greatly affect the reception range of the circuit. That's it, the bug is ready!

Now turn on the radio and look for the frequency of our bug. The signal from it can be caught at a frequency in the range of 88-108 MHz. For me this frequency was 92.2 MHz. If the bug “does not communicate,” then try moving apart the turns of coil L1 - this should help solve the problem.
With a supply voltage of 1.5 volts, the reception range is 30 meters; if you increase the voltage to 3 volts, the reception range will increase to 100 meters.
This circuit also has another application - an audio transmitter. Let's say you need to output sound from your phone to a tape recorder, but the latter does not have an audio input function. No problem! In this situation, this scheme is very useful. Almost all tape recorders have a radio reception function (FM radio), which is what we will use. Remember the dotted line on the bug diagram? We exclude microphone M1 from the circuit, connect capacitor C5 to a capacity of 10 μF, connect a 3.5mm mini-jack plug to the minus of the capacitor and the minus of the power supply (minus of the jack to the common one, left/right to the minus of the capacitor) and transmit sound from the phone to any radio receiver located within the range of the transmitter! If the parts are installed correctly, the circuit begins to work immediately.
These products can be used for a variety of purposes: from indoor listening to wireless sound transmission.
And this is where my article comes to an end, good luck to everyone in repeating!

This scheme was developed in connection with the need to listen to a neighbor. I think it won’t be difficult even for beginners to make such a wiretapping bug, since the device contains only a couple of parts. Despite the simplicity of the design, the device is highly stable due to the use of the KT325V transistor.

The operating frequency of this transistor is above 1000 megahertz; I do not recommend replacing it, but you can also use KT368 or an imported analogue of S9018. The capacitors are non-polar; imported ones were used in this circuit, but I highly recommend using domestically produced tubular ones.

An electret microphone will do, but for greater sensitivity it is advisable to use a microphone from a Chinese tape recorder. The installation is done on a small printed circuit board; wall-mounted installation is also possible, but the quality of the bug may suffer as a result.

Beginners often confuse the polarity of an electret microphone, and I specifically attach a photo to the article; microphones from imported manufacturers usually have two contacts.

The negative of the microphone is connected to the body by lines, and the other contact is the microphone input. The range of such a bug reaches 70 meters with direct visibility, just an excellent option for wiretapping neighbors. The beetle is caught on an ordinary Chinese-made FM receiver. The antenna is a piece of multi-core insulated wire with a length of 20 cm.

The range of supply voltages is quite wide. The power source can be a battery from a mobile phone or a crown with a voltage of 9 volts; the device also starts working on two AA batteries.

The finished bug is usually received in the region of 91 - 98 megahertz (fm). Using a variable capacitor, you can adjust the frequency of the beetle to any range within fm. The coil is wound on a frame with a diameter of 5 mm and contains 6 turns of wire with a cross-section of 0.5 mm (0.3 - 1 mm).

Microphone sensitivity does not exceed 5 meters, but it is possible to add a microphone amplifier to the KT315, then the sensitivity will increase to 7 meters. And in the end I want to give some tips on setting up.

1) When setting up, try not to touch the device with your hands
2) Before assembly, check all parts for functionality, including the microphone.
3) The bug is difficult to catch on digital technology, so it is advisable to use Chinese receivers.
4) Check the charge of the transmitter battery being used.

Continuing the topic of simple circuits for amateur radio operators, we will look at how to make a simple wiretapping bug with your own hands. A simple bug can be used not only for spying, but also, for example, for listening to a room in which a small child is sleeping. The wiretapping bug circuit has been simplified to the simplest possible assembly and has a minimum of parts. But along with its simplicity, the bug has a transmission range of up to 100 m. Below is the diagram of the bug itself

. All radio components are common and do not have to be purchased at a radio store. You can get a microphone from a Chinese tape recorder. Please note that the microphone has polarity, the plus of 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 it. 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 begin their installation. To mount the parts, a 2 x 3 cm double-sided printed circuit board is used. To obtain tracks, the board does not need to be etched; the slots can be made with a cutter.

Setting up a bug for wiretapping.
Setting up the bug comes down to setting the operating frequency. To begin with, we scroll through the radio in the FM range and try to catch our voice. If it doesn’t work, we move the coil turns apart and catch again. As the turns move apart, the frequency of the transmitter increases. Attention! Only if the frequency of the transmitter matches the frequency of the radio station, it is necessary to shift it up or down.

Mini bugs for wiretapping your wife. Software wiretapping for mobile phones.

Mini bugs for wiretapping a mobile phone are a thing of the past. When considering the issue of using radio bugs for mobile phones, one cannot ignore the issue of modern, technologically simpler and more functional software bugs, which can easily turn functional smartphones for Android, with half-axis and other popular OS into full-fledged tracking devices for the owner.

Software wiretapping for a mobile phone, which can be purchased via the Internet on official websites, i.e. without leaving your home, is a program that runs secretly on the monitored smartphone. This type of spyware collects information about calls from a smartphone, or uses its microphone to eavesdrop on its surroundings. It easily tracks subscriber movements and manages the address book. And this is only the basic functionality of the spy program. They are capable of much more interesting things, while a regular phone bug in the form of a printed circuit board can only transmit a signal from a microphone over a short distance via a radio channel.

So, the spy program collects information from the smartphone and sends it to the server where your personal account is located. 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 you can track and control the owner, always knowing who he was talking to and what he was talking about, and where he was. Here is another one of these programs.

It's not good to eavesdrop. But there are situations when you need to know what is happening in a small child’s room or in class at school. This requires homemade wiretapping, using the most current method of transmitting information - ordinary radio waves.

Homemade FM bug

The necessary device can be purchased in a store or ordered online. But a high-quality device will be expensive, and a cheap Chinese product will quickly fail. Therefore, it is more practical and cheaper to make a wiretapping bug yourself.

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

A very interesting miniature device for passing exams. Even a beginner can assemble it. It consists of an earphone and a transmitter.

Below is a working diagram of a DIY bug for listening:

1. Transmitter
2. Micro earphone.

Schematic diagram of a basic bug for listening

The advantage of this device is its miniature size. The earphone 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 using a 1.5 V battery and a transmission range of at least 100 meters.

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

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

Collecting a radio bookmark

The result is a small and easy-to-make homemade wiretap that can be easily hidden in an inconspicuous place. However, this model has a small drawback - the antenna is 50 cm long. This is not entirely convenient if you want to hide the device as much as possible.

Connecting components according to a given diagram

Battery Installation

How to make a radio bug for listening:

1. Let's cut a rectangle measuring 53 mm by 75 mm from thin plywood or textolite. Homemade wiretapping will be based on it;
2. we will make coil L1 from copper wire with a cross-section of 0.3–0.5 mm, winding eight turns onto 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 is 1.8–2 cm in size. We straighten the upper ends in different directions and tin the lower ends;
4. for the choke, take a copper wire with a cross-section of 0.05–0.1 mm and wind it tightly onto a match. The height of the wrap is approximately 6–7 mm. We cut the match to a length of 1.0 cm, make slits at the top and bottom in which we secure the ends of the wire;
5. The antenna is made from a cable 50 cm long in plastic insulation, wound in 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 diagram. 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 parts strictly according to the diagram.

Terms of use

Let's look at how to use a wiretapping bug. Since the device transmits on standard broadcast frequencies, it can be heard by any transistor or cell phone.

Having assembled the device, turn on the FM radio and look for the bug signal. It is not difficult to distinguish it from other FM sounds. When you rotate the receiver knobs, clicks should be heard. The loudest sound will be the signal of the radio bug. Then we set the device to the selected range.

Well, in the end, we need to remind you that a homemade wiretap can only be used as a home toy for hidden radio surveillance of an apartment, or as a baby monitor for a child. You should not break the law.

Bug in the car. What kind of wiretapping is most often installed in a car?

• Audio control in the car can be carried out by a GSM bug. Its miniature size and the ability to disguise its appearance as familiar objects (for example, a flash card) make it completely invisible. All the eavesdropper needs to do is install a bug, purchase a SIM card, insert it into the device and make the first call. The wiretapping is automatically turned on, and the car becomes a surveillance site. An attacker can not only record conversations over a long period of 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 voice recorder records all the necessary information for a certain time, after which this recording must be taken away along with the device. The voice recorder can also be hidden 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 method of not only auditory surveillance, but also visual surveillance. The video camera is not always equipped with a microphone to pick up sounds, but it will always be able to show who the subject of surveillance is giving a ride to or meeting with.

It wouldn’t even occur to many that you can make a small bug from an ordinary mobile phone for wiretapping at a time convenient for you.
Any phone equipped with regular buttons (non-touch) is suitable for this. The phone that was used as a test subject was a flip phone type. The phone model is similar to the Samsung A800, but only with a color display. Other 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 removed from any equipment of any production time, starting from the 60s.

To turn a mobile phone into an original bug you will need a board with buttons. The above-mentioned transistor must be soldered to the button that is responsible for calling and receiving an incoming call. The emitter of this transistor must be soldered to the minus of the button, and the collector to the central terminal. The base pin connects to a transistor that provides the display backlight signal.
You can solder as follows:
1. Take a wire and solder it to the minus of the speaker with one end, and connect the other to the minus of 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 a signal should be carried out at the terminals, for example, a headphone jack. During a call, you need to ring the terminals with a wire from the plus speaker until the ringing melody is heard.
4. The found pin 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 located next to the buttons have been desoldered to save battery power. All that's left is an LED to indicate the phone's functionality. This LED also lights up when there is a call.

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

The antenna is soldered natively in its place or from some Motorola, since they have proven reliable antennas.
The headphone/headset jack has been desoldered and shorted. 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, an ordinary telephone turned out to be a rather simple and not very large bug for eavesdropping. This is a good spy thing that can be hidden in both the lamp and the system unit.

Modern mobile technology has become firmly entrenched in our lives, and we can no longer imagine ourselves without it. The once ordinary telephone 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 being dishonest with you, but you cannot prove it - access to the smartphone is locked with a password. Suspicions torment you day and night, preventing you from living a normal life. In this case, our spy gadgets will come to your rescue: a special spy program that will help you monitor your smartphone and dispel your doubts.

Spyware works discreetly and anonymously: the person whose phone contents you are monitoring does not even realize that he is being monitored.

What you can control

* Intercept SMS. Do you suspect your other half of infidelity? Do you have any reason to believe that your loved one is flirting with someone behind your back? or find out your wife is cheating? This is easy to check. Using the software you order from us, you will have access to text messages that are sent from and sent to the phone you are interested in. 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, audio, video files and images.

* Phone calls. Do you think that your business partner is playing some kind of dishonest game behind your back and leaking important information to third parties? Catch him in the act! Spy gadgets for your phone - make all incoming and outgoing calls 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 to you. You can even record the content of a telephone conversation.

* Subscriber location. You can absolutely accurately track a person's location. 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 when you need it. It is useful for parents to periodically review the contents of their teenage children's smartphones and check whether they are interested in something that is taboo in the family.

* Internet browser history. Another useful feature for parents. You will be able to view what pages your child visits, what he downloads from the World Wide Web, and how much traffic he uses daily. After all, you pay for using the mobile Internet, so you have the right to know what exactly your money is spent on. In addition, spy gadgets will help prevent unpleasant stories associated with a child posting personal information on the Internet, which is often used by swindlers and swindlers in their dark affairs.

* Fixation of turning on/off the 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 this is not so.

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

Microphone technology for long-distance listening varies depending on the type. Based on 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 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:

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 products are prohibited for use. You should be as careful as possible. Installing wiretapping bugs on clothing or other similar devices is fraught with unpleasant consequences. That is why today utilities that allow you to bug your phone are more popular. Due to the fact that the range of such a listening device depends on the operator’s coverage area, you can listen to conversations anywhere in the world.