Ultrasonic dog repeller. Do-it-yourself dog repeller - step-by-step instructions How to make an ultrasound from dogs

People who have been bitten by angry dogs suffer from obsessive phobia throughout their lives. The fear of homeless animals not only prevents you from moving around the city calmly, but also makes you worry about the safety of your own children. Sometimes getting to school or shopping requires scaring off a pack of stray dogs. A stick or stone against a whole pack is a disastrous idea, especially if a child has to defend himself.

How to scare dogs away

Using special dog repellers (daisers) is a real chance to protect yourself and your loved ones. These devices easily fit into a jacket pocket, backpack or handbag, and are just as quickly removed from there if necessary. It is important to understand the operating principles of different diffusers in order to choose the most powerful one. Among those currently on sale, the ultrasonic repeller is considered the most effective. . Its action is enough for 13 m, which means that the dogs will not have time to get close.

The cost of factory-made diffusers is quite high, so people often use homemade devices. Real craftsmen will be able to make any repeller with their own hands: chemical, ultrasonic or electric. Why buy an expensive device if the one you make yourself is no less effective?

Dog Repeller

Do-it-yourself chemical dog repeller: what and how to make it from

Chemical dispensers are devices filled with a composition that is toxic to animals and humans. The principle of operation of the repeller is to spray a caustic liquid onto the mucous membranes of the dog’s eyes, nose, and mouth. It is difficult to assess the effectiveness of such a diffuser. Firstly, its use involves close contact with angry animals, which in itself is very dangerous. Secondly, if a large number of dogs attack, there is simply not enough time to spray a can of “chemicals” on everyone.

For your information! Making a chemical repeller is easy. The work will require ingredients that can be found in any kitchen: ground black pepper, vinegar, mustard powder. Some people use shag instead of vinegar when making such a diffuser. The result is cans with different compositions.

How to make a chemical disperser at home?

Option #1:

Preparing the container for the chemical composition. As a rule, this is a 0.5 liter plastic bottle without a cap onto which a sprayer is placed.
Mixing the composition: add pepper to the vinegar, shake everything together.
The liquid is poured into the bottle and closed tightly. Not very convenient, but you need to carry it with you.

Option #2:

Preparing a container for a chemical mixture. It is convenient if it is a 0.25 liter jar with a tightly screwed lid.
Preparation of the caustic mixture: finely chop the shag, add pepper and mustard powder. Mix.
Transfer everything into a jar and close the lid. Carry with you, when an aggressive dog attacks, pour the contents onto the animal.

Do-it-yourself ultrasonic dog repeller: diagram, powerful diffuser

The ultrasonic dissipator, which produces a sound that is unpleasant to the dog's ear, is highly effective. The advantages of this device are that it is absolutely harmless to people and works even over long distances. Stray dogs immediately pay attention to the ultrasound signal, quickly leaving the meeting place with a person. By using the device in a critical situation, you will be able to immediately disperse the entire pack, rather than fighting off each dog separately.

Dog repeller circuit

You can make an ultrasonic dog repeller with your own hands using various designs of powerful detectors taken from the Internet. They can be remade if technical skills allow, or used in finished form. The universal circuit of an ultrasonic dog repeller requires the presence of a microcircuit, transistors, resistors, and diodes. At the stage of assembling the ultrasonic repellent device, it is important to follow the recommendations of specialists:

use a piezoceramic emitter during the manufacture of the diffuser, which will evenly distribute the load;
To turn on the light, select LEDs D3. Their installation is carried out in the farthest part of the device;
In order for the repeller to work at a frequency of 25 kHz, you need to take a resistor P35, but you should not experiment with frequency parameters. In this regard, it is better to stick to the settings of factory models;
The power of the ultrasonic diffuser should not exceed 130 dB. Otherwise, the device will not only scare away the animal, but will also cause significant harm to it;
for long-term operation of the ultrasonic device, it should be equipped with slots for 8 9V batteries;
checking ultrasound pulses is the final touch in the work. This can be done using an oscilloscope or a sound card compatible with a computer;
if the device was prepared for stationary use (for example, for a summer residence), then it must be enclosed in a moisture-resistant case and equipped with clamps.

Electric dog repeller: components and assembly rules

An example of a homemade dog repeller

Due to ignorance of the principles of operation of an electric disperser, it is often confused with a conventional stun gun. Many people immediately refuse to purchase such a repeller, since it contradicts their ideas about humane treatment of animals.

Important! The electrodisser is not intended for close contact with the dog's body. The device only creates a loud intermittent noise effect that scares away aggressive animals.

To make an electric dog repeller at home, you will need the following elements: a plastic bottle, a high-voltage module, a micro button and a AA battery. The technology for creating a homemade device is simple:

Secure the AA battery and module using electrical tape.
Solder the button and wires to the surface of the battery.
After making the base for the repeller, you should cut the electrical wires.
Cut off the neck of a plastic bottle to create a diffuser to enhance the sound signal and protect against voltage.
Place the diffuser on the electrical module, making small cuts on the neck.
It is good to glue the junction of the neck and the module.

Visual information about making an electric dog repeller can be obtained from YouTube videos made by people with special technical skills. There, the electrodisser is shown in action: the sudden crackle of electrical discharges has a depressing effect on dogs, and they hide. No matter how many stray animals you encounter, the loud blasts of an electric repeller will send everyone running.

Note! Despite the tolerant attitude of most people towards homeless animals, it is unacceptable to be careless about one’s own safety. A dog is truly a man's friend, but only if it is cared for from puppyhood and kept in decent conditions.

Stray dogs live by different laws, and it is difficult to predict their behavior in a given situation. Due to the trials that street animals have to endure every day, they become embittered and increasingly attack passers-by.

A homemade dog repeller will always protect a person, the main thing is to keep the device with you. No one knows where a dangerous clash with a pack will happen: during an evening walk, in an unfamiliar area, on the way to the house. Stray dogs may share prey, territory, or chase a bitch; you should not deliberately attract attention to yourself and try to calm the animals down. Task No. 1 in this situation is to leave the dangerous territory as soon as possible, but if that doesn’t work, use a repeller.

The problem of stray or aggressive dogs walking without a muzzle is always acute in small towns or certain areas of metropolitan areas. A meeting with such an opponent can end very badly for a person. In addition to the necessary surgical intervention, a course of vaccination against rabies will probably be required.

A homemade ultrasonic dog repeller is an excellent alternative to a purchased device. Such a product can be finely tuned, manufactured in a convenient package, and obtain improved performance and reliability for less money.

The mechanics of operation of a do-it-yourself dog repeller are no different from commercially produced devices.
With the exception of the main parameter - it is more powerful and operates over a larger frequency band.

Using:

Do-it-yourself ultrasonic dog repeller produces high-frequency sound;
vibrations inaudible to humans affect the dog’s hearing organs, causing pain and disorientation;
Unlike serial ones, if you make a dog repeller yourself, the device will change the radiation frequency within a wide range, further increasing the impact on the dog.

Homemade devices use fairly, so to speak, large-scale approaches to the formation of a strong sound wave. In serial products, piezoceramic emitters and speakers with a large diaphragm are rarely found, which the ultrasonic dog repeller circuit can boast of.

Therefore, a correctly configured and carefully assembled device works effectively, with an almost complete guarantee of a positive result.

A homemade dog repeller is a fairly simple device. If we look at proven and workable circuits, it is easy to see that they are built on simple principles and understandable mechanics of interaction between the main hardware parts.

To make a dog repeller yourself, you don’t need to order or look for rare, expensive elements. Most solutions are built on microcircuits and transistors, which can be easily purchased at any electronics store.

The basic principle on which the DIY dog repeller circuit is built is the interaction of two oscillatory circuits.

In this case it is observed:

clarity of the base carrier frequency formation;
high output power of the final stage;
varying the frequency of sound over a very wide range.

Even a person with basic skills in working with a soldering iron and making printed circuit boards can understand how to make a dog repeller.

The microcircuits, transistors and diodes used do not belong to the micro-sized class. Therefore, it is easy to make a powerful dog repeller with your own hands without the use of a microscope, specialized solder, or a soldering station.

Ultrasonic repeller

If we turn to the experience of radio amateurs who have studied many circuits of serial devices in order to improve the device, it is easy to find two technical solutions on specialized forums.

Both feature high power output, use inexpensive, common parts, and are easy to set up.

One of the options for making a dog repeller yourself is to use a solution built using a K561LA7 digital elementary logic chip.

To assemble it you will need:

digital element with 4 logical blocks K561LA7;
transistors types KT3102 (3107)
piezo emitter, class BF1 SQ-340L; instead, to increase the sound pressure, it is allowed to install a specialized ultrasonic emitter MFC-200.

The operating principle of the device assembled in this diagram is as follows:

The first carrier frequency generating circuit is a symmetrical multivibrator assembled on two of the four logical elements of the microcircuit.
The output of the primary generator is a rectangular signal with a frequency of about 1.5 Hz.
The task of the secondary circuit is to generate an ultrasonic signal from the base frequency signal. A multivibrator, built on the two remaining logical elements of the microcircuit, creates a rectangular signal with a frequency of about 20,000 Hz, which quadruples every 0.66 s.
A push-pull transistor amplifier is used to drive a speaker or piezoelectric element. Its emitter load is the sound-emitting element.

The circuit provides protection measures against power reversal, overvoltage, and also a frequency filtering system. This DIY electric dog repeller circuit requires some practical operating skills, as well as fine tuning. But the finished device is very effective, it starts with one button.

For those who are unfamiliar with the intricacies of soldering microcircuits, a simple circuit is intended for a do-it-yourself dog repeller. It contains only 13 elements, the key of which is the KD503A diode, which is simultaneously responsible for the maximum output power and protects the device from power reversal and other emergency modes.

For assembly you will need:

resistors: 5 constant and one trimmer;
piezoelectric sound emitter, class ZP-1, ZP-25;
a pair of common transistors KT361B (3107);
ceramic capacitors;
protection diode KD503A;

switch, button - to supply power.

After manufacturing the printed circuit board, all that remains is to carefully install and solder the elements. You will get the most powerful ultrasonic dog repeller with your own hands, the entire setup of which comes down to adjustment with a resistor to form the optimal frequency.

Wherein:

output power is regulated only by the voltage supplied from the battery;
The limiter is a protective diode. It can be replaced with an analogue, with an operating voltage from 5 to 12 V;
the variable resistor is responsible for selecting the frequency.

The installed battery is selected in accordance with the protective diode used. For KD503A - Krona 9V is suitable.

How to use a dog repeller correctly

When attacking an aggressive dog, it is important that the action of the device is unexpected and as sharp as possible. Therefore, there is no need to panic ahead of time.

remove the device from your pocket or bag;
bring the dog at a distance of at least a meter;
point the repeller's sound emitter at the animal;
press the start button.

In a moment of shock and short-term retreat, it is worth continuing to point the repeller’s sound emitter at the dog. However, if the animal moves a distance of a meter or more, the device should be turned off. It is worth understanding that sound pressure begins to drop sharply as the distance increases. Therefore, the effect of turning on the repeller a second time will be much stronger if the dog gets a little used to retreating without the influence of a weak ultrasonic signal.

It is not necessary to aim the line of sound emissions directly at the animal’s ear. The vibrations are well propagated by the bones of the skull, so it is enough to aim the repeller at the animal’s head. There is no need to waste time choosing some optimal direction.

Conclusion

Understanding how to make a dog repeller with your own hands and having some skills in working with a soldering iron, it is not difficult to create a device that will be much more powerful and efficient than commercially available models.

It is worth noting one feature of homemade products, which can serve as excellent advertising. Dog repeller circuit - involves the use of powerful, simple, inexpensive and common components.

The fault tolerance and reliability of a self-assembled device depends only on the accuracy of the radio amateur. At the same time, the efficiency of the device is higher, and the price is incomparably lower than that of the offered serial models of similar output power.

Reading time: : 4 minutes

Stray dogs can cause a lot of harm to both adults and children. They can greatly frighten, bite and injure a person. Dogs have a negative attitude towards people who ride bicycles and motorcycles. In such cases, many people are looking for ways that could save them from. Some people carry gas cans with them, while others carry special ones. We’ll look at how to make a dog repeller with your own hands in detail in this article.

Can be made in several versions. Any repeller is also called a Dazer. It can be either a chemical device or an electronic one. Their power depends on the type of device. The most powerful ones work at a distance of approximately 13 meters. This result will be obtained if you apply . This is the best option; you won’t be afraid to walk the streets with it in the evenings.

The cost of devices that scare animals is not cheap, so many people invent a homemade electric or chemical repeller. Making the device yourself will be much more profitable than buying it. But to start doing something simple, you need to be patient and, of course, have special knowledge. If a person does not understand how to make it, then it is better to purchase a ready-made one and not waste your time.

For dogs, made by yourself, the most powerful and safest. A person will be able to protect himself and at the same time not get injured. The device simply gives a signal that only animals can hear. Dogs respond quite sharply to high-power ultrasound. They immediately turn away from the person and run away. The important thing is that the device scares not only one dog, but also an entire flock. The number of pets has no effect on the device's ability.

The device operates even at a fairly long distance. And the closer the animals stand, the stronger the sound will be.

How to make a chemical apparatus with your own hands?

To start making a simple chemical apparatus, you need to prepare the necessary ingredients. We need to take:

vinegar;
ground pepper.

Or you can use the second method:

black pepper;
shag;
mustard powder.

Production technology

The easiest option without electricity is a parody of pepper spray. To do this, you need to take a 0.5 liter plastic container and fill it completely with vinegar. Next, add 1 tablespoon of pepper. Then we chop and put on the sprayer. But not everyone will be comfortable carrying a bottle with them.

For the second option, buy good shag, chop it finely and mix it with pepper. To enhance the effect, add more mustard. All products are poured into a bottle that is easy and quick to open. If the dog begins to pester, the entire mixture is thrown into its eyes, nose and mouth.

Do-it-yourself ultrasound machine

The device operates from a sound that only dogs can hear; this sound is absolutely safe for humans.

First option

The circuit looks like a powerful one, it consists of the following parts:

The speaker from which the sound will come. You can take it from a calculator, column or box.
Krona battery, which should have 9 volts or 12 volts. Regular phone batteries work just fine.
Scheme K5 61LA7 or K176LA7.
Three silicon small diodes.
Five pieces of capacitors.
Five resistors of 100 kilo-ohms.
One resistor is 33 kilo ohms, and another is 2.
Four pieces of KT3102 transistors.
Silicon transistor, which has a current of at least 30, one piece.
Switch.
Textolite.
Solder and soldering iron.

Second scheme

For the second electrical circuit you will need:

There are five resistors with a power of 0.25 W.
Variable resistor.
Speaker – ZP-1, ZP-18, ZP-25.
Two transistors, such types as KT361B or 2T3307A, 2T3307V.
Two simple ceramic capacitors.
One protective diode KD503A.
Tumblr.
Textolite.
Solder with a soldering iron.
9 volt battery, accumulator or power source with an intensity of 1.5 to 15 volts.

Production technology of the first version

For such a device you will only need one electrical circuit and 5 transistors. For the resistor and at the same time for the capacitors, a multivibrator is made from orthogonal pulses that have a frequency of 1.5 hertz. The second multivibrator, which includes two more resistors and one capacitor, as well as the remaining logical parts, will have pulses of 20 kilohertz. The output sound is greatly increased due to the transistor bridge, which loads the device in the form of speakers. They can also be replaced with machine speakers to increase the operating range of the device.

Production technology of the second method

The second fundamental option is simpler, it includes only thirty elements. Five output resistors are needed in order to reduce the intensity and to limit the possibility of current. They also give a start to the operating points, namely two transistors. They do frequency control at the same time as capacitors.

Resistors control the frequency of sound, so they are selected according to power. A protective diode is needed to save the device in cases where the voltage poles are accidentally confused. Its power is allowed 1.5-12 volts. The higher the voltage, the stronger the vibrations emitted will be. a good invention, and most importantly a simple one.

What are dog repellers used for?

Stationary is used to scare dogs if they want to attack a person. They are also convenient to use for those who live in a private home. If suddenly the owner sees a stray pet in his yard or garden, then through the device the dog will be able to hear an unpleasant sound and quickly run away.

In addition, such a device can be used on a dog, but do not use very powerful devices. The dog will grow up obedient and will do everything. You should not forget about the rules for using the device. The battery needs to be charged every day. The device is aimed at the angry animal with a deviation of no more than 5 degrees. If for some reason the sound does not start working, then you need to turn on the flashlight.

At the moment of a collision, a person will have a few seconds to take out the repeller and use it, so it is advisable to carry it right in your pocket. The device works well through clothing, you just need to press a button and that’s it. Do not escalate the situation and provoke an angry pet. It is better not to touch the dog and come very close to him.

Summarize

Whether to use a protective agent or not is up to each person to decide for himself. It is important to protect children from evil animals. If a person is afraid of dogs, then it is better to do it yourself or purchase a ready-made device. If it is always in your pocket, a person will behave calmly and not be afraid to walk the streets.

Thus, if a person is confident in his defense, he will be in a good psychological state. Therefore, it doesn’t matter what kind it will be, homemade or purchased, the main thing is to follow the rules of use so as not to injure yourself.

It's no secret that there are more and more homeless, stray, and aggressive dogs in our yards every day. Thus, you and I daily risk becoming a victim of the so-called “friends of man.” Consequently, you can only rely on your own strengths and the achievements of science. Below is a diagram of an ultrasonic dog repeller.

Basic electrical diagram.

The action of an ultrasonic repeller is based on the combined effect of ultrasound and flashes of light on animals. Ultrasound is inaudible to humans, but it has a depressing effect on dogs, causing them to feel fear, and they try to get out of your way. To increase power and optimal matching with the emitter, this circuit uses a symmetrical cascade with an output transformer at the output. An ultrasound generator with a frequency of 25 kHz is assembled on the IS1 K1211EU1 chip. The frequency of the generator can be adjusted using trimming resistor R3. At the output of the K1211EU1 microcircuit, two antiphase signals with a frequency of 25 kHz are obtained, which are supplied to the output stage on transistors T1, T2 and Tr1.

The signal shape at the output of the K1211EU1 microcircuit.

The load of the transformer is a piezoceramic emitter KPUS-25T-16T or similar with a resonant frequency of 22-25 kHz. For optimal matching, the emitter is connected via inductor L1. LED D2, connected through a zener diode with a voltage of 5.6 V and a series resistor, serves as an indicator of battery discharge. When the LED lights dimly or goes out completely, you need to change the battery. LED D3 indicates that the device is turned on. Setting up the device consists of setting the frequency to 25 kHz using resistor R3 and checking the pulses on the emitter using an oscilloscope. When the emitter reaches resonance, the pulse takes on the shape of a sinusoid and has a maximum amplitude.

Signal shape at the emitter.

The pulse transformer is wound on a small-sized ferrite core of suitable dimensions. Primary winding 2 x 20 turns PEL0.15 secondary winding 80 turns PEL0.15.

Bread board.

To further increase the power (for example, with a stationary version), you can increase the number of emitters to 5-10 pieces. In this case, transistors T1 T2 need to be replaced with more powerful ones, for example IRF 640.

A properly configured ultrasonic rodent repeller deflects the flame of a candle or lighter at a short distance. When approaching, the flame of a candle or lighter goes out.

The ultrasonic model sends high-power ultrasound signals towards the dog. Ultrasound has a depressing effect on dogs, forcing them to turn around and even run away, while the device is completely safe for humans. As the dog approaches, the signal intensifies and the animal begins to feel discomfort. The device is compact and can be carried with you in a bag or pocket. As the animal approaches, it will react and the signal will increase. With a repeller, a whole pack of dogs is not scary, which is very convenient; you can do without blood and victims. There are a lot of electrical diagrams for this device on the Internet, so if necessary, you can assemble it yourself and buy the components at any radio store. The device is quite simple, and it will cost you much less.
An electric device or stun gun is no less popular. It’s also compact, and when you press the button it produces a characteristic crackling sound, which means that ozone is released, which is unpleasant to a dog’s sense of touch. The device is dangerous for an approaching dog; if the distance decreases, it can give an electric shock and temporarily paralyze. The device will also force the dog to open its jaws if the dog still grabs you.
Gas in the form of a gas canister with a chemical filler inside. When buying a spray can, pay attention to its technical characteristics, since not all products are effective; if a dog attacks, the product may simply fail. When sprayed, the dog should rush, run away and no longer show aggression. In principle, you can build a gas pistol yourself by filling the cartridges with red hot pepper. You can leave the device idle. Sound is effective against dogs; the device can also be made with a light signal reflector.
Repeller - smell. Everyone knows that dogs have an excellent sense of smell and they do not at all like, for example, the smell of medical or isopropylene alcohol. All you have to do is wet the tampon. But this method has a big disadvantage - the alcohol evaporates quickly, which means you need to carry it with you at all times when going outside. Hot capsicums are irritating to the dog's nose, skin, and eyes, as is the smell of lemon, orange, and vinegar.

Principle of operation

Inside the body of the ultrasonic repeller there is a generator with an electrical circuit and high-frequency pulses, thanks to which the signal propagates. The device is equipped with a power source; simple models run on batteries.

Devices can be stationary or portable. In the first case, they are installed on the object and begin to operate when the dog approaches the object. In the second case, you can carry it with you to avoid encounters with aggressive animals.

Advantages and disadvantages

The undoubted advantage of all repellent devices is their safety for humans, as well as:

Instant exposure of an animal to an ultrasonic or electronic device.
Convenient to use, just remove the pocket from the case, or press the button found on all modern devices.
High efficiency of devices.
The efficiency of the devices regardless of the time of day and weather conditions.
Compact dimensions of protective devices.
No skill required to use.
They begin to act at a distance of 25-30 meters.

How to make your own ultrasonic

To assemble an ultrasonic model, you need to select a microcircuit and 5 transistors.

1. Description of the circuit

This foreign scheme consists of:

Standard timer 555, frequency 40 kHz.
Amplifier based on transistors TP1.
Timer 555 IC2, generating an antiphase signal.
Ultrasonic transducer.
Power switch in the form of a button.
Lead-acid battery when using the device in stationary mode.

Required materials and tools:

You will need a piezo emitter for assembly; you can borrow them from the dynamics of old speakers, a music box, or a calculator.
The case can be taken from a radio that has failed Chinese equipment.
9V batteries
Transistors type KTV816
Diode printed circuit board
Piezosiren, suitable for a car
Oscilloscope
Indicator, LEDs
Resistor, suitable from an old TV.

Step by step guide:

Assemble the generator.
Adjust the frequency using resistor R3; the output of the circuit should produce 2 antiphase signals, frequency 25 kHz3.
Connect the emitter to the choke.
Connect a voltage of 5.6 V through a zener diode, LED D2.
Connect an indicator for low battery, and LED D3 to turn on the device.
Set the frequency to 25 kHz with resistor P35.
Check the operation of the pulses on the emitter using an oscilloscope.
If the assembly option is stationary, use more emitters in the device, up to 10 pcs.
Install powerful IRF640 transistors along the way.

How to make an electronic repeller

With the slightest knowledge of electronics, assembling the device is not at all difficult. Large financial costs will not be required either. You need to purchase a microcircuit and transistors. To regulate the frequency of sound, it will be necessary to create an additional unit consisting of resistors, transistors and diodes designed for protection in case of polarity reversal.
After assembling the device, you need to check the resistance of the resistors so that the load is applied to them evenly; additional installation of a piezoceramic emitter will be required.
Power supply for the repeller is a standard crown, voltage -9 V.
The LED flashlight is built into the front of the housing.
To increase the power, it is advisable to install 8 batteries (AAA standard), capacity 300 mAh, under the crown.
The essence of the electronic device is the activation of a high-frequency pulse generator when a dog approaches. The frequency is not perceptible to humans, but animals hear the noise of the generator very well.

Do not experiment with the device on your pets; if you point the repeller at them, you may lose their trust in the future.
Set the frequency recommended by the manufacturer; if it is exceeded, the device will quickly fail.
Typically the device is designed for a range of 30 meters, which will prevent the animal from invading your territory.
When choosing a finished device, pay attention to the cost, ease of design, quality of all components, manufacturer’s brand, and production technology.
Please note that cheap devices may be ineffective, unreliable, and may not meet the parameters specified in the documentation.
Choose an acceptable type of device in advance; if you carry it in your pocket, it is better to buy a portable model. If you need to install it on a tree or wall, choose a stationary device.
Cobra is considered a new and high-quality model with 4 operating modes; it can be used as a security system. A small pocket device - Osa, costs only 1200-1500 rubles, is effective and convenient to carry in your pocket.
The ultrasonic device with a power of 130 dB is distinguished by high volume. At a distance of 1 meter for a dog, this is the noise of a jet plane, the effect on the animal is simply deafening, thereby you can put it in an aggressive state, you will only make things worse for yourself in particular.
Do not rush to use the device if the dog is calm and does not at all seek to harm you.
A distance of 4-15 meters is considered large for the repeller to work effectively; it may simply not have an effect on the animal and lose its power at a distance. Consider the range of the device when purchasing or designing a model yourself.
Do not panic when an animal approaches, do not make sudden movements. Keep your finger on the button; when attacking, it is better to let the predator get closer, the noise will be deafening, and the shorter the distance, the more effective the device will be.
Do not play with the repeller, do not turn it on unnecessarily, for example, pointing it at a quiet, innocent dog.
13.Do not let children play with the device; it is better to teach them how to handle it correctly.
Don’t be a provocateur by turning your pet against you; with the device turned on, you can provoke aggression, but why would you want to do that?