Ultrasonic cockroach repellers: choosing and making your own

25.03.2020

No one is happy about cockroaches in an apartment. Homeowners are usually surprised to see uninvited guests in their home. Cockroaches are associated with unsanitary conditions, so you want to get rid of them quickly. Despite the variety of folk, chemical and physical methods for exterminating cockroaches, today ultrasonic and electromagnetic repellers have become very popular. In this article we will tell you more about ultrasonic devices.

Domestic cockroaches

• The principle of operation of the repeller
• Advantages and disadvantages of ultrasound
• DIY ultrasonic repeller

Homemade devices are no worse

In some cases, a rodent and cockroach repeller can be created with your own hands from available radio components.
The design is quite simple and undemanding in terms of exact adherence to denominations; prototyping is accessible even for beginners. You can make a high-quality ultrasonic cockroach repeller with your own hands literally in one evening. There are many different schemes on the Internet, and spare parts for creating the device can be found in Chinese and Soviet radio equipment (old radios, players, tape recorders). The repeller circuit is very simple. Just one evening - and a pile of non-functional rubbish turns into an extremely useful device for any household or private apartment. It will become a real disaster for cockroaches, bedbugs and rodents. You can protect your home from these parasites by independently developing a device according to the diagrams provided on the Internet, or simply by purchasing a ready-made device.

When will the result appear?

The device will not get rid of unwanted guests instantly. On the contrary, in the first days the cockroaches will be more active and it may seem that there are more of them. It is this circumstance that explains the opinion of some users who claim that the device not only does not repel, but also attracts insects.

Adults will leave the apartment in about 2 weeks, but their eggs will remain, since neither ultrasound nor electromagnetic radiation destroys them. In about a week, new individuals will hatch. Having seen them, people often again come to the erroneous conclusion that the device is insufficiently effective. You should be patient, and after 4-6 weeks the annoying insects will completely disappear from the room.

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:

1. Secure the AA battery and module using electrical tape.
2. Solder the button and wires to the surface of the battery.
3. After making the base for the repeller, you should cut the electrical wires.
4. Cut off the neck of a plastic bottle to create a diffuser to enhance the sound signal and protect against voltage.
5. Place the diffuser on the electrical module, making small cuts on the neck.
6. 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 discharges of an electric repeller will make everyone run away

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 encounter 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

Glue ambush

Most often, no matter how hard you try, mice still appear in the area. How to fight is a painful question, to be sure. One of the most effective methods is glue traps. An ordinary disposable plate is taken, special glue is applied along its rim, bait is placed in the middle, and it is left in the places most attractive to mice. Rodents, following the tempting smell, stick to the edge of the plate - and this is where your determination comes into play. In most cases, they are simply thrown into a bucket of water or beaten with a broom. Of course, in some ways it is cruelty, but war is war. But the pest does not suffer for long.

Criterias of choice

When deciding which device to buy, you should determine the purpose of its use. Stationary models that require a constant connection to the network are suitable for the home; mobile and compact devices that do not take up much space are suitable for the street.

You should first study customer reviews. Some devices don't live up to the promises their manufacturers make.

Attention! There are a lot of fakes on the market - you need to buy devices only from trusted suppliers who have proven themselves on the positive side

Therma CELL

Outdoor repellent lamp. At the same time it is a good night light. It is based on the principle of fumigation - the device heats up and evaporates a repellent that drives away insects. It does not smell and does not harm people.

Characteristics:

• coverage area - 20 m²;
• brightness - 220 Lum;
• works thanks to a butane cartridge;
• requires replacement of consumables - gas cartridges and plates with repellent;
• Safe for children, allergy sufferers and pets.

Price - from 1400 rub.*

Therma CELL

Protector Freetime

The personal protective equipment is made in the form of a bracelet. Emits ultrasound. An excellent option for fans of tourism or country holidays.

Peculiarities:

• made of hypoallergenic materials;
• automatically turns off after 8 hours of continuous operation;
• range of action - up to 1.5 m;
• 4 operating modes.

Cost - from 2000 rubles.

Protector Freetime

Rexant 71-0014

Ultrasound device intended for home use. Requires connection to an electrical network. The affected area is 30 m². It has 2 radiation modes, which eliminates the adaptation of insects. Price - from 250 rub.

Rexant 71-0021

Portable ultrasonic keychain. Repels mosquitoes by imitating the squeak of a dragonfly, their natural enemy. Protects against insects within a radius of three meters. Has 3 operating time modes: 2, 4 and 8 hours. Cost - from 250 rubles.

Fighting mosquitoes with folk remedies

The first thing that owners of summer cottages resort to. Everything is used - vinegar, lemon, cinnamon, vanilla extract, eucalyptus oil, juniper sprigs, mint, rosemary, basil, garden lilac and indoor geranium. The list is far from complete, but there is an opinion that all these things protect against mosquitoes and repel them. And this is true, but only half.

How does it work

Female mosquitoes find victims based on the heat and scent they emit. What do acetic acid and basil have in common? That's right: a sharp, pronounced aroma. It is unlikely to repel insects, but it will mask the smell of human sweat. This is exactly how most folk remedies work.

You can check. Spray some perfume around yourself - the effect will be no worse than vinegar.

❏ Cheap, accessible, always at hand.

❏ Safe if you are not allergic.

❏ There is a result, but with some reservations.

Flaws

Geranium and vanilla will not help get rid of mosquitoes in the country. These are more like personal protective equipment: they will “hide” you, make you “invisible” for the bloodsuckers for a while. The duration of action is limited to 20-30 minutes, but the mosquitoes themselves will not go away. Therefore, if you decide to defend yourself with lemons and mint, stock up on them properly.

How to choose electronic repellents for cockroaches and insects?

Experts say that choosing the right outlet for cockroaches and its proper placement is a guarantee of effectiveness.

Let's figure out what features of the device you need to pay double attention to:. Serviced area

Serviced area.

The greater this characteristic, the more powerful the remedy for cockroaches in the outlet, the more electricity it consumes. But this does not mean that for a room of 20 m2, you need to purchase a unit designed to serve 100 m2 for faster results. A more powerful device against cockroaches will get rid of uninvited guests faster, but at the same time it will create significant noise loads in 20 m2. It will be problematic to be near him. Therefore, after 1-1.5 weeks, household members refuse the device and the insects return.

Emitter type.

In rooms with an area of ​​up to 50-60 m2, an ultrasonic cockroach repellent with a directed emitter works more effectively. In spaces that are not cluttered with furniture and furnishings, scattering emitters are more effective.

Maximum level of ultrasonic pressure.

The calculation is carried out per 1 m2. When buying a device for exterminating cockroaches in a house or apartment, you should make sure that this indicator is within 100 dB.

Power consumption.

Household electronic protection against cockroaches does not have to be heavy-duty. A device consuming 3-6 Watt/hour is sufficient. Maximum power up to 10 W. If insect populations are small, you can also choose a battery-powered, autonomous ultrasonic device for cockroaches. But in this case, the operation of the device will have to be monitored. Because the equipment operates silently, it is often forgotten.

External data.

An overly designed electrical insect repellent may not have the required efficiency, but its cost will be 30-70% higher. Therefore, experts recommend choosing the “golden mean”.

A purchased cockroach repeller should not be plugged into an outlet behind furniture. The emitter must be aimed at free space (there are no obstacles to the propagation of the sound wave). While the room is being processed, you can remove a certain amount of upholstered furniture, decorative elements, books, etc. from the room. It is worth remembering that the cockroach repeller generates a high-frequency sound wave that is absorbed by soft objects.

Issues of personal safety when operating insect repellent devices plugged into an outlet or powered by batteries will also be important. It must be remembered that the devices are not placed in wet areas. And also where domestic rodents and small birds live. If you strictly follow the rules and recommendations in the instructions for the ultrasonic device against cockroaches, its operation will be as effective and safe as possible.

Comparison of parameters of different models

Model Typhoon LS-200

The power source of this design is mains voltage. But the Tornado OK.01 model operates on an area of ​​up to 50 square meters. m, the frequency range is much wider: from 4 to 40 kHz. This model is powered by three batteries.

User opinions on different versions

Model Cosmos Economic

The lowest rating belongs to the Cosmos Economy device. None of those who had the opportunity to evaluate it in action were satisfied with the results. Although its cost is extremely low, which is very attractive, however, these costs in almost all cases turned out to be impractical.

But, if you really need to purchase an effective ultrasonic mosquito repeller, which device is better today?

It will be difficult to answer this question unequivocally for the same reason that the range of oscillations of ultrasound frequencies emitted by different types of such insects differs. But there are often positive reviews about Tornado brand devices.

Do-it-yourself repeller

If you plan to purchase an expensive model of such a device, you can easily try to assemble it yourself. It will probably cost significantly less. But to create a truly effective design, you will need some experience in such work. A do-it-yourself ultrasonic mosquito repeller can easily be assembled using one of the many schemes offered by the most advanced users in this field. Here is one of them, created in the Splan 4.0 program:

Repeller circuit

For work, simple, non-scarce elements are used, which can always be found in the right quantity

Particular attention should be paid to the piezo emitter, since it is advisable to purchase an option that creates increased sound pressure during operation. This could be ZP-22

For those who have the opportunity to make a printed circuit board, the following option is offered:

To implement this solution, you will need a ferric chloride solution, with which you will need to etch the tracks on the board, after which they are covered with a protective gel flux. To complete the picture, it is necessary to select a battery of sufficient voltage for comfortable operation of the device for some time.

Watch the video and do it yourself:

When assembling an ultrasonic compact mosquito repeller with your own hands, the most important thing in achieving this task is to create a sufficient level of sound vibration frequency. To adjust this parameter, you should select frequency-setting capacitors C1 and C2 (see diagram). With a fairly large capacity of these elements, the output frequency is within the range of not ultrasonic, but simply sound vibrations.

Electrical circuit of a dog repeller

• A simple version of the dog repeller (Fig. 1) is assembled on one digital chip (DD1) and five transistors (VT1~VT5). An infrasonic generator is made using logic elements DD1.1, DD1.2, resistors R1, R2 and capacitors Cl, C2. It is a symmetrical multivibrator that produces rectangular pulses with a frequency of 1.5 Hz.
• The second symmetrical multivibrator, built on elements DD1.3, DD1.4, resistors R6, R7 and capacitors C5, C6, is an ultrasonic generator, the frequency of rectangular pulses of which is 20 kHz and periodically (every 0.66 sec) increases by 4 times. A smooth periodic “rise” of the ultrasonic frequency upward is performed by a part of the circuit containing resistors R3-R5, transistor VT1, capacitor SZ, diodes VD1.VD2.
• The rectangular ultrasonic waves created at output pins 10 and 11 of the DD1 microcircuit have low power. They are amplified in power by a push-pull bridge amplifier made using VT2-VT5 transistors. The emitter load of this amplifier is a piezoceramic emitter BF1.
• Ultrasonic vibrations (modulated by infrasonic ones) are excited in it after pressing the SB1 button, which performs the “on” function.
• The power circuit of the DD1 microcircuit is protected from accidental “reversal of polarity” of the GB1 battery by the VD3 diode, and filter capacitors C4 and C7 provide transmission of high-frequency and low-frequency oscillations through the power circuit.
• When you use the ACT-10 car piezo siren instead of the SP-1 piezo emitter, the range of the repeller will increase significantly.
• The GB1 battery can be assembled from six to ten galvanic cells (316), D-0.25 batteries, or you can use a ready-made 12-volt battery L1028 or a 9-volt “Krona” or “Corundum”.
• The K561LA7 microcircuit can be replaced with 564LA7, K176LA7, K1561LA7.
• Diodes VD1-VD3 - any small-sized silicon, transistor VT1 - any low-power silicon with a base current gain of at least 30.
• Transistors VT2, VT4 and VT3, VT5 can be replaced with any of the KT3102 and KT3107 series.

When assembling a dog repeller, you can not use microcircuits at all, then the number of transistors will increase to nine. Fig. 2 shows a diagram of the second version of the repeller, more precisely, part of it (the rest is according to Fig. 1), in which the infrasonic generator consists of transistors VT6, VT7, capacitors C1, C2 and resistors R1-R4, and the ultrasonic generator consists of transistors VT8 , VT9, capacitors C4, C5 and resistors R7-R10. The ultrasonic frequency “stealing” circuit has resistors R5, R6, capacitor SZ, transistor VT1 and diodes VDI, VD2.

Publ.: 2013-06-13

Change: 2017-08-31

• 2590 rub.

  The ultrasonic rodent repeller SD-002 has a protection area of ​​up to 400 sq. m. It is used against rats and mice, and repels cockroaches, ants and other insects. Power supply: mains.

• 1790 rub.

  3 types of waves. The device is ideal for use in small residential and non-residential premises, operates on a 220V network and is effective against rodents and small crawling insects.

• 2100 rub.

  Tornado OG.08-400 is designed to protect premises from rodents. For installation in granaries, warehouses, household and industrial premises. Effective area 400 sq. m., power supply: 220 V network.

• 3150 rub.

  Tornado OG.08-800 is designed to protect premises from pests. Repeller of rodents, rats, mice for tunnels, underground communications and other elongated objects. Effective area 800 sq. m, power supply: 220 V network.

• 1500 rub.

  For installation in all types of residential and non-residential premises. It has a wide angle of ultrasound radiation and two operating modes (sound and silent). Effective area 400 sq. m.

• 1300 rub.

  For installation on an area up to 400 sq. m. For premises where people are constantly present, as well as for non-residential objects with temperatures ranging from -15 to +45 degrees. Silent.

• 2000 rub.

The penetration of mice and rats into the house becomes a big problem for its inhabitants. Rodents not only spoil food, things and furniture, rats and... There are many ways to combat gnawing pests, ranging from chemicals and ending with folk recipes. An excellent alternative to all these methods can be one, which works by emitting high-frequency sound waves. Among the popular brands, devices stand out. Considering the rather high cost of the device, many craftsmen have learned to assemble an ultrasonic rat and mouse repeller with their own hands.

Generator circuit for repelling rodents

• The electrical circuit of the generator includes an ultrasonic vibration generator (C3, C4, DD1.3, DD1.4, R3, R4), a low frequency modulator (C1, C4, DD1.4, R1, R2), a power amplifier using transistors VT1- VT3, emitter, which uses a high-frequency loudspeaker 4GDV-1.
• The generator emits frequency-modulated oscillations in the range of 15....40 kHz. The frequency can be adjusted by resistor R4, the modulation frequency is adjusted by resistor R2 within 2...10 Hz.
• If you set contact SB1 in such a way that in case of unauthorized entry into the room this contact closes, the generator can work like a security alarm siren, since it begins to emit frequency modulation in the range of 1000...2000 Hz.
• It is important that when working for a long time in one frequency range, rats get used to it, so you need to change the radiation parameters with resistors R2-R4 2-3 times a week. Or connect capacitor C4 to a piece of wire that creates an additional capacitance that changes with changes in temperature and humidity. Then the frequency will change randomly.

Generator circuit

Using an electronic repeller

Electronic devices for repelling mosquitoes are widely used due to the variability of models:

Stationary.

They work when connected to the network or from batteries. Visually they resemble conventional fumigators, but they are significantly superior in safety.

They are often used in children's rooms, where other methods of fighting insects (aerosols, fragrant spirals, etc.) can harm the child's health.

Portable.

Compact models are convenient to take for an evening walk, a picnic in open gazebos or a jog along park alleys. The device can be worn as a bracelet or keychain, attached to any item of clothing.

Street.

The electronic device is powered by a battery or batteries, and visually the repeller resembles a small plastic container. Due to their mobility, outdoor repellers are widely used by fishermen and hunters.

Types of devices

All the devices described have the same principle of operation, but there are a great many models and types, and there are more and more of them every year. The basic devices are the following:

Sports ultrasonic models for lovers of an active lifestyle. Such devices are equipped with solar panels, special clasps and a compass. Outwardly, they look like ordinary wristwatches. Not only the service life, but also the charging speed depends on the build quality and battery power.

Such devices are mounted on the walls of houses. Modern models of this type have purifiers - air ionizers that kill bacteria using insecticide strips.

Ultrasonic devices

Ultrasound is considered to be acoustic waves whose frequency exceeds 20 kilohertz. Ultrahigh-frequency radiation today is widely used in medical technology and production. The human ear is not capable of perceiving very high frequencies, but some animals and insects use ultrasound to transmit information to each other and react to it.

Ultrasonic devices, according to the developers, work effectively against a wide variety of pests

The described feature made it possible to use ultrasound to repel pests, including cockroaches. However, in this case, more questions arise than answers, because the latter practically do not react to sounds and communicate through direct physical contact and chemical secretions.

The operating principle of an ultrasonic repeller is quite simple. When power is applied, the electronic filling of the device generates pulses of the required amplitude. A sawtooth voltage is supplied to a special sensor (piezoelectric element or dynamic head), which generates the final acoustic signal.

Do cockroaches feel fear when using ultrasound?

Manufacturers of ultrasonic devices note that when the repeller is turned on, cockroaches experience a feeling of fear and panic, trying to leave the dangerous territory as quickly as possible. In light of the fact that pests do not have organs for perceiving such signals, this statement may be very doubtful.

An effective cockroach repeller must have sufficient power

On the other hand, some users still note a certain effect from the use of high-power ultrasonic repellers, but the operation of such devices is permissible only in the absence of people. Thus, we can conclude that the effectiveness of household ultrasonic repellers in the fight against cockroaches will most likely not be high, but this method is applicable in conjunction with other measures to control and prevent the appearance of pests.

Advantages and disadvantages of ultrasonic devices

Among the positive aspects of using ultrasonic cockroach repellers are:

• ease of use - the devices do not require any specific maintenance and care;
• safety in relation to people (there is a conflicting opinion of experts);
• environmental friendliness - the devices do not emit harmful or toxic substances.

The disadvantages of ultrasonic cockroach repellers are:

• their unsafety in relation to pets - especially small rodents (hamsters, mice and rats) and birds;
• most often low efficiency;
• quite high price - especially for the so-called professional models.

Rules for using a cockroach repeller

You can achieve a certain effectiveness of the repeller by adhering to the recommended rules for its use.

The ultrasonic cockroach repeller is placed at a height of 1–1.5 meters from the floor

User manual:

• use not one, but several devices at the same time. This approach will help get rid of insect colonies. Ideally, you should place an appliance in each room;
• The repeller should not be installed level with the floor. By raising the device to a height of one meter, you will significantly increase the area of ​​its impact;
• in a room cluttered with furniture and other interior items, the effectiveness of the ultrasonic repeller is reduced. The way out is to install two or more devices indoors;
• While using the gadget, you need to monitor your condition, the condition of other people, especially children, as well as the behavior of pets. If anyone becomes ill, you should stop using the repeller;
• If damage or malfunction is detected, the device should be repaired or replaced. Using a faulty device is unacceptable;
• use the repeller in combination with other methods of control and prevention. The main remedy, for example, may be a special insecticide;
• According to manufacturers of ultrasonic repellers, the effect of using the latter is not immediate. You should wait one to three weeks;
• The device must operate continuously and cannot be disconnected from the network. Otherwise, the cockroaches will most likely return.

EcoSniper AR-115

Another effective electronic device against mosquitoes and midges of a stationary type, which has an incredibly economical power consumption mode. It is produced in China.

The operation process of the stationary device is based on the use of ultrasound technology, which affects the nervous system of mosquito pests. It is displayed by the light indicator that this device is equipped with. The area of ​​influence extends to 50 square meters. m.

The advantage of the device is its two-mode operation: it can be used not only as a repeller, but also as a night light. To obtain the expected effect, objects that could become an obstacle to ultrasonic waves should not be placed near the device.

Weitech WK0029 and EcoSniper AR-115 You can purchase an ultrasonic repeller either in specialized stores in Moscow or order it via the Internet. The cost of the product is 1200 rubles.

Ultrasonic mouse repellers: operating principle

Rodent and mole repellers operate using ultrasound. Signals at high frequencies (30-70 kHz) are not perceived by humans, but are clearly audible to pests. It irritates their nervous system, and animals tend to leave the discomfort zone. Factory-made repellers can also generate electromagnetic waves, which further suppress rodents. Devices can be powered by batteries (rechargeable batteries) or mains power. Electromagnetic pulses, unlike ultrasound, are able to penetrate almost any surface except metal.

To make a mouse repeller, you will need basic knowledge of electrical engineering and the ability to use a soldering iron. There are many examples of working diagrams with photos. Simple and universal repellers have the following advantages:

• high efficiency;
• reducing the risk of errors during manufacturing;

High-quality repellers effectively eliminate rodents

• no need for adjustment devices during design;
• economical in terms of energy consumption;
• unpretentiousness to working conditions.

Advantages of the device

Repelling mice with ultrasound has a number of advantages:

• no need to search for and remove the carcasses of dead rodents;
• there is no danger of poisoning pets with poisons;
• safe for people;
• works throughout the room, no need to update baits.

The electronic device repels not only rats and mice, but also many insects. In parallel with rodents, you can remove ants, cockroaches, and spiders from the house.

A properly assembled homemade ultrasonic mouse repeller works no worse than a factory one, but has its drawbacks. A more effective option is a combined version of the device that generates both ultrasonic and electromagnetic waves.

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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?

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.
2. Mixing the composition: add pepper to the vinegar, shake everything together.
3. The liquid is poured into the bottle and closed tightly. Not very convenient, but you need to carry it with you.

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

Repellents and their effectiveness for the street

Indoors, people are accustomed to protecting themselves from bloodsuckers with mosquito nets and repellents in the form of creams, aerosols, gels - special chemicals that emit a strong odor that has a detrimental effect on insects. This also includes strong-smelling anti-mosquito bracelets.

So-called fumigators are also used - electrical devices that heat a plate inserted inside with substances poisonous to mosquitoes, or pyrotechnic devices in the form of a candle or spiral, which must be additionally set on fire. But the radius and duration of their action on the street are significantly inferior to the effect of indoor use.

In addition to this, doctors do not recommend using such products frequently: the poisons contained in repellents are absorbed into the blood through the skin and harm our body, in particular the liver. This also applies to external sprays and gels, and plates for fumigators, whose poisons enter the bloodstream through the respiratory tract.

Therefore, it is better to pay attention to new mosquito repellent devices for the street, which work on a completely different principle.

Assembly Rules

DIY ultrasonic rat and mouse repeller

The rat and mouse repeller circuit is drawn up on PCB. In the absence of one, everything is connected by wires. Separate wires are routed to the battery and speaker. The sequence of assembling the repeller circuit is as follows.

1. Checking the drawing.
2. Stripping wires, treating them with tin and rosin.
3. Sequential soldering of parts.
4. Connecting the power supply.
5. Testing.
6. The homemade device is placed in a suitable housing or box, in which holes are made in the speaker area.

You should not expect instant results from the device. The effect will be noticeable after 2-3 weeks of continuous operation of the electronic device. You can achieve full results in the fight against rats and mice after 2 months.

When using an ultrasonic device against mice and rats, remember that ultrasound is repelled from a hard surface and absorbed by a soft one. Therefore, its use will be more effective in a room that is not cluttered with objects. To get rid of mice and rats in an apartment or private house, it is necessary to use devices of this type in all rooms at the same time, without giving rodents a chance to move from one room to another.

There are plenty of traditional means to control rodents. Among them are poisons, baits, mousetraps. They are effective, but not suitable for use in homes with small children and animals. You can get rid of mice and rats using an ultrasonic repeller. These devices are among the latest methods of controlling household pests.

Operating principle

Manufacturers of ultrasonic repellers claim that the devices act on insects thanks to special sound frequencies. The human ear cannot detect them, but the sounds repel mosquitoes.

Interesting!

A mosquito repellent device produces sound waves similar to the flight vibrations of a dragonfly, a bat, or repeats the sounds of a male mosquito. Females pose a particular danger to humans. They feed on blood to give birth to new offspring. After fertilization, females try to avoid meeting males, so the squeak of a mosquito scares them away.

DIY insect repellers

It is not easy to calculate what kind of ultrasound a homemade device will produce, but, according to users, the design of the ultrasonic mosquito repeller is correct and effective.

Advantages and disadvantages, features of use

The popularity of various models of repellers is due to their undeniable advantages over similar methods of fighting mosquitoes:

• ease of handling;
• health safety;
• no negative impact on other household appliances;
• long period of work;
• low power consumption.

Ease of use

But it was not without its drawbacks. Consumers noted the following disadvantages:

• high price;
• the gadget is not always able to repel insects;
• after turning off the device, insects quickly return;
• there is a high probability of buying a fake.

To get the desired effect, you should familiarize yourself with the features of using these devices:

• You need to choose a suitable location for the ultrasonic repeller. Acoustic waves do not penetrate objects, but are reflected from them. If the space in front of the device is cluttered, there is no need to hope for a positive result.
• To protect against insects outdoors, several devices are connected simultaneously. They are placed around the perimeter of the site so that mosquitoes cannot get closer.
• Models with several operating modes are suitable for long-term use. Insects become resistant to ultrasound over time, so the frequency of the acoustic waves is periodically changed.

Important! Before using the device, be sure to read the instructions and become familiar with the operating rules.

Primitive but very effective bottle traps

Empty drink containers are often used to catch insects and even small rodents. A mosquito trap made from a plastic bottle will not decorate the interior of an apartment, but it will reduce the number of insects significantly.

Bait with yeast

To make a catching device, you will need a 1.5-2 liter bottle, a glass of water, a pinch of sugar and 1 g of dry baker's yeast. The process consists of several stages:

1. Use a knife or scissors to cut off the neck of the plastic container. There is no need to throw in the cut part - it will still be needed.
2. Dissolve sugar in water. To do this, it is advisable to heat the liquid. Cool the resulting syrup to 35-40°C and pour into a prepared plastic container. To catch flies and wasps, sugar is replaced with sweet jam.
3. Pour yeast into the sweet solution. These can be baked, granulated, dry. Without yeast, fermentation will not begin.
4. Place the cut top into the bottle with the neck down to form an analogue of a funnel, secure with tape or tape.
5. Wrap the trap in dark rags or paper. Place in a place where mosquito activity is observed, avoiding direct sunlight.

Yeast trap A homemade trap does not lose its properties for 2 weeks. After this period, the syrup needs to be replaced. The operating principle of the device is very simple. In essence, this is a primitive mosquito trap using carbon dioxide. During the fermentation process, carbon dioxide is released, which attracts flying blood-sucking individuals. Once in a funnel, they cannot get out of it.

Fishing with sunflower oil

To build the structure, you will need a plastic container, a few tablespoons of vegetable oil, or just an empty bottle of sunflower oil. Trap manufacturing technology:

• cut off the top of the bottle;
• generously lubricate the walls of the vessel with vegetable oil;
• using a sharp object, make holes through which you can stretch the ropes;
• hang mosquito traps in places where insects accumulate, preferably under light sources: lamps, lanterns.

The concept of this trapping device is not entirely clear. Vegetable oil is not capable of acting as a bait for mosquitoes. It is likely that insects attracted by light accidentally fall into the container, and after coming into contact with vegetable oil, they temporarily lose their flight abilities. You can only check the effectiveness of a trap through your own experience.