Radio bug - how to make a simple and powerful FM transmitter with your own hands. Everything is under control - remote listening Bug 5 8 mm which

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 a homemade wiretap using the most current method information transmission - ordinary radio waves.

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 earpiece 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 operating frequency devices.

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

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. Most loud sound and will be a radio bug signal. 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.

Although making listening devices, so-called “bugs” is illegal and threatens criminal liability, for the inquisitive mind of a radio amateur, this is not an obstacle for self-education and interest; in addition, such a device can simply serve as a radio microphone for a karaoke system. This simple bug, which is assembled on just one transistor, operates in the VHF range from 80 to 108 MHz, and is received on a regular FM radio.

Its sensitivity is quite good and depends on the electret microphone used, since there are both good electret microphones and not so good ones, for this you will have to choose a similar one with better sensitivity, and the sound will be clear and not distorted. The bug's range is up to 50 meters, depending on the length of the antenna and the transistor used. The only obvious drawback of such a circuit is that it unstablely maintains the frequency as the battery discharges, because this is the simplest radio microphone circuit, without quartz frequency stabilization, so it is better to choose a power source with good capacity.

Parts you will need to make an FM bug:

• A small piece of foil fiberglass or breadboard;
• Transistor KT368 or BC547, KT3102, S9018, with the last transistor the power and range of the radio microphone will increase;
• Microphone (suitable for any Chinese tape recorder);
• Resistor R1 – 4.7 kOhm;
• Resistor R2 – 270 Ohm;
• Capacitor C1 – 1nF;
• Capacitor C2 – selected depending on the frequency;
• Capacitor C3 – 4.7pF;
• Capacitor C4 – 100nF;
• A piece of wire 20–40 cm long as an antenna;
• Power source: 3V battery - CR2032 lithium tablet or 3.7V battery.

How to make a simple FM bug, step by step instructions:

We take a piece of the board and use a sharp knife to cut out the tracks, you can also etch them out, but since this is a simple bug circuit and the board turns out to be tiny, I decided to cut out the tracks with a scalpel. You can also solder everything on a small piece of breadboard.

We wind the coil L1, for this we need a wire in varnish insulation with a diameter of 0.4 to 0.6 mm, we wind it on a mandrel with a diameter of 4 mm, for which a rod from a helium pen is a good choice, we make 12 turns around the mandrel.

We solder all the parts onto the printed circuit board; when soldering the microphone, pay attention that it has a connection polarity and you must not confuse them, in order to understand which pin needs to be soldered to the minus, and which to the input of the transistor, you need to look at it from the terminals side, where output there are branches of tracks to aluminum body, this is a minus, the opposite one, which does not touch the body, is a plus and must be connected to the base of the transistor.

A flexible piece of wire from 20 to 40 cm long serves as an antenna. The longer it is, the greater the distance the bug will be able to transmit sound.

Setting up a radio microphone is very simple; to select the transmission frequency, you need to select the capacitance of capacitor C2; here are approximate correspondences of its capacitance to the frequency in FM:

• 10p – 88 MHz;
• 8.2p – 95 MHz;
• 6.8p – 104 MHz.

Also, the frequency is adjusted by stretching the turns of coil L1.

The consumption of the entire circuit is not large, about 5-7 mA, and therefore a flat lithium battery is suitable as power supply - CR2032 3 volt or something else better battery at 3.7 volts, for example from a cheap Chinese mp3 player, it is small and the capacity is quite enough. You can also choose a suitable case for it, small and convenient.

That's it, our simplest DIY FM bug on one transistor is ready, all that remains is to connect the power, set the radio microphone frequency on the receiver and enjoy the result.

Continuing the topic simple circuits for the radio amateur, we will look at how to make a simple bug for wiretapping with your own hands. A simple bug can be used not only for spying, but also, for example, to listen 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

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 mobile phone- this is yesterday. 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. Such spyware collects information about calls from a smartphone, or uses its microphone to listen to the environment. 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 the microphone to short distance via radio channel.

So, the spy program collects information from the smartphone and sends it to the server where your personal account. 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 earpiece 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. His miniature sizes, the possibility of camouflage appearance under familiar objects (for example, a flash card) allows you to 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 everything necessary information for a certain time, after which this record along with the device must be collected. 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 period starting from the 60s.

To turn a mobile phone into an original bug you will need a board with buttons. To the button that is responsible for calling and accepting 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 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 pretty 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. A 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.

Spy software works discreetly and anonymously: the person whose phone contents you control 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 can 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 is “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 capture the content telephone conversation.

* Subscriber location. You can absolutely accurately track a person's location. This happens thanks to GPS and communication with mobile towers mobile 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. One more useful feature for parents. You will be able to view what pages your child visits, what he downloads from worldwide network, how much traffic is consumed daily. After all, for using mobile internet You pay, so you have the right to know exactly what your money is being 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 exactly what information passes through the smartphone of the person you are interested in, just order a convenient spy device from us, install it on the phone being tracked, 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 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.

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.

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 can achieve required frequency: when the turns are shifted, the frequency of the transmitter decreases, when they move apart, it increases. Just tune in to the frequency you need and enjoy the work done!

I have compiled instructions for you on how to assemble a bug with your own hands. This bug circuit is not difficult to assemble, consists of accessible parts and is powered by 9 volts from the crown. The range is 200 or more, it all depends on the transistor used. I found the circuit on an American website, fully working and effective, verified!

Bug Scheme

Location of parts on the board:

To get started, download the archive with the signet and make a beetle board. Then solder all the parts into place as shown in the photo above. The archive can be downloaded from the link at the end of the article.

Coil manufacturing:

Now you need to make a coil. To do this, take a bolt and wind 7-8 turns of copper wire with a diameter of 0.5-0.7 mm along the thread, then twist the finished coil from the bolt and solder it to the board.

The coil is in its place and our beetle is almost ready, all that remains is to figure out the power supply. For ease of use of the beetle, I suggest installing it directly on the battery (crown). To do this, we need two crowns, one can be taken as a used one, from it we will need to remove the power mark and solder the wires from the board to it. See below for how to do this. The second crown will power our circuit and serve as a stand for the beetle.

Installing the power stamp:

Well, we take a glue gun or glue for it and glue the stamp to the board. Our bug is ready!

Setting up a radio bug:

To tune the beetle, take the receiver and tune it to a frequency in the range of 87-108 MHz. Place the beetle on the crown without touching the coil, use a screwdriver to slowly turn the trimmer capacitor until you hear feedback from the radio receiver in the form of a tone sound signal. By the way, the beetle can also be caught on the radio of a mobile phone, my auto search even finds it, so try this option first. When tuning, the beetle and the receiver should be close, and once you tune in to the sound, move them away from each other. That's it, the beetle is completely ready and set up!