How to make a mouse repeller at home. Ultrasonic Rodent Repeller

The principle of operation of the mole repeller is that the electronic device generates vibration pulses with a frequency of about 480 Hz.
These vibrations cause seismic waves in the earth, which propagate well in it.

Since moles are able to feel even weak vibrations of the soil at a great distance, such powerful impulses cause them a feeling of fear and the animals leave their habitats.

1 - plastic case; 2 - bushings; 3 - plug; 4 - electronic board; 5 - contacts for batteries; 6 - spring; 7 - sealed cover.

Mole repeller Tornado OZV.02 is the most powerful and effective device.
These conclusions were made by us in the process of monitoring the results of the work of many repellers for several years.

The device operates on four AA batteries and is safe for pets, plants and humans.

Guaranteed to drive out moles, ground squirrels, earth mice, bears and shrews.

Your attention is presented to several schemes of mole repellers for assembling these devices with your own hands.

The pulse generator assembled on the IS1 chip generates oscillations with a frequency of 480 Hz, which are fed to the output key assembled on the T1 transistor.
Next, the vibration motor M is turned on, which creates the vibration we need.

By selecting the resistances R1 and R2, you can set the operating time and pause time of the vibration motor M.
The vibration motor is attached to the body of the repeller, the circuit is placed in a waterproof case and the device is ready for action.

Of course, all the schemes presented are easily repeated and really work, but do not forget that the mole repellers presented on this site are factory-made by specialists, they will be much more efficient and reliable.

Scheme of a mole repeller with an emitter in the form of a relay.

Usually, the EMX-309L1 device is used as emitters in mole repellers, but if it is not possible to get just that, then the output can be found by using a conventional electronic relay.
Such a scheme is shown in the figure.

The circuit consists of two generators on microcircuits IS1 and IS2. Electrical impulses are applied to the relay contacts, which close and open in accordance with the frequency of the generator.
This creates vibration. The scheme is simple, scarce details are not required for its repetition.

The off-season is a good time to prepare for next year, when you can make a mouse repeller. This device allows you to protect beds, storages and housing from rodents, moles and shrews. The stores sell ultrasonic repellers with a complex circuit and at a fairly high price. However, you can make such a device yourself in a budget version.

Rodent and mole repellers act with the help of ultrasound. The signal at high frequencies (30-70 kHz) is not perceived by humans, but it is perfectly audible to pests. It irritates their nervous system, and animals tend to leave the zone of discomfort. Factory repellers can also generate electromagnetic waves that further depress rodents. Devices can be powered by batteries (accumulators) or from the mains. 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 wield a soldering iron. There are many examples of working schemes with photos. Simple and versatile repellers have the following advantages:

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

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

Preparation of materials for mounting the repeller

For a simple do-it-yourself assembly of a battery-powered repeller, you will need a set of radio components:

1. Piezo emitter (in the diagram - BQ1). The key element of the radio circuit reproduces ultrasonic waves. Suitable for any model. For example, from the ZP series.
2. Resistors (R1-R5). They set operating points for transistors, perform a lot of auxiliary functions. For a repeller, 5 pcs will be enough. conventional output elements with a power of 0.25 W.
3. Variable resistor (R6). Adjusts the frequency of outgoing ultrasonic waves. It is selected in accordance with the rated power of the piezo emitter.
4. Capacitors (C1-C2). Involved in the formation of frequency contours. For the repeller, use conventional lead ceramic elements.
5. A pair of transistors (VT1-VT2). Amplify electrical oscillations, form a frequency circuit with other details. Use PNP transistors: KT361B, 2T3307V, 2T3307A, KT3107 and other similar ones.
6. Diode (VD1). Auxiliary detail in case of accidental polarity reversal during connection. For example, KD503A.
7. Sliding toggle switch for power on and off.

The power supply of such a mouse repeller is carried out by batteries or batteries of any type. Power - in the range of 1.5-12 V. The higher, the stronger the ultrasonic vibrations of the device will be. If you plan to be powered by a Krona battery, provide additional special pads for them.

To protect against moles and rodents, you can attach a regular primer from the handset of an old landline telephone. Part brand TK-67-NT, TON-2, TA-56, TA-56M or TG-7. The winding resistance should be approximately 60 ohms. Such elements generate waves at a frequency of 300-3400 Hz. The resistance of the microcircuit inside the part is 260 ± 52 ohms (at a power level of 1000 Hz).

Attention! The main advantage of such a repeller is the tightness of the emitter housing.

Making a mouse repeller body

The device is conveniently made on the basis of a cylindrical metal can for coffee, pet food, etc. Repeller assembly order:

Advice. The printed circuit board is best placed in a plastic bag. At the exit point of the wires, tie it with a thread.

Instead of a telephone capsule, you can use a purchased piezo emitter. The principle of assembling the repeller in this case will be unchanged. Only the ultrasonic wave generator will require additional insulation. The jar will add additional distortion to the radiation, so the sound of the repeller will seem even more disgusting to rodents and moles. In fact, the metal itself will vibrate, receiving an impulse from the emitter.

Close the jar with a lid. Then bury it in the chosen place. Depth - about half the height so that water does not get under the cover of the repeller. It is far from ideal in terms of tightness.

Be prepared that it will not work out immediately to eliminate pests. Time must pass - up to 2 months. If you plan to place the repeller indoors, make it more powerful. Walls and other obstacles will reduce the effectiveness of low sound levels.

Other pets can also react negatively to waves. In this case, adjust the frequency. Experiment with this even at the stage of assembling the repeller circuit.

Mouse repellent device: video

And the influx of pests is such that the traps cannot cope, it is worth buying an ultrasound generator. There are enough foreign and domestic models in stores. But you can make an ultrasonic rat and mouse repeller with your own hands.

What parts to use

The device can be assembled on the ne555 or ne556n timer. Microchips P416 and KT315 will make the signal, which is responsible for repelling rodents and insects from the house, stronger.

Before you start assembling, you need to acquire the necessary details:

• capacitors C1, C2, C3 - one each;
• resistors R1 and R2 - 2 pcs.;
• resistors R3, R4, R5 - 1 pc.;
• transistors KT361, GT404, GT402 - 1 pc.;
• 5 V battery - 1 pc.;
• dynamic head - 1 pc.

Parts can be removed from unnecessary or old electronic boards, or you can look for components of the microcircuit on the market.

On a note!

The speaker should be selected based on the size of the room. A power of 0.5 W will allow ultrasound to be propagated over a distance of a thousand meters.

Variable resistors (R1 and R2) help to set the output level of ultrasonic waves. Simple resistors (R3, R4, R5) reduce the voltage in the mains.

Capacitors and transistors allow you to make a frequency circuit.

You will also need the following components:

• diode - will protect the device if it is incorrectly connected to the network;
• piezo emitter - produces an ultrasonic signal;
• toggle switch - turns the device on and off.

You will need to buy a soldering iron. Without it, the scheme of the rat and mouse repeller will remain unassembled.

How to assemble

Before assembling the parts, it is necessary to check the drawing and tidy up the wiring. Their ends need to be cleaned and treated with rosin and tin.

The scheme of the ultrasonic rodent repeller is assembled on a textolite. But if it is not there, then you can simply solder everything with wires. Two long wires are separately output to the power supply and to the speaker.

All parts of the ultrasonic repeller are soldered gradually. In this matter, you should not rush, because you can overheat the transistors and the rat and mouse repeller will not be able to work.

After assembly, a power source is connected to the device and the device is tested. The speaker should make a small beep.

The ultrasonic rat and mouse repeller is placed in the case. For this purpose, take a suitable box. Even cardboard packaging from sweets or a cigarette pack will do.

Poke a few holes in the box on the side of the speaker with a needle. Homemade apparatus will make sounds unpleasant for mice and rats

The principle of operation of the device

Produces high-frequency sounds in the range of 30 - 70 kHz. The human ear does not perceive this frequency, and many cockroaches and other pests begin to feel discomfort.

Some devices emit electromagnetic waves in addition to ultrasound. The latter penetrate even through walls and allow you to scare away living creatures at a greater distance. Ultrasound waves, meeting with an obstacle - a wall or furniture - are reflected from it.

On a note!

The frequency of mice repelling should be changed from time to time. In this case, the rodents will not be able to adapt to the device.

When creating or buying a device, you should consider where it will work.

The electronic circuit presented below will help get rid of moles and other underground pests in the summer cottage. Schematic electrical circuit.

Typically, in such circuits, EMX-309L1 emitters and the like are used as a vibration source. In the absence of such a radiator, you can use a small-sized relay for the appropriate voltage. When appropriate pulses are applied to the relay, the relay contacts are continuously switched, thereby causing the relay housing to vibrate. The relay housing is rigidly connected to the device housing, through which the vibration is transmitted to the ground. It should be noted that underground inhabitants are very sensitive to various kinds of sounds and vibrations underground. Moles are able to feel a crawling worm for several meters and hunt for it. Various kinds of vibrations and extraneous sounds have a depressing effect on moles and force them to leave unfavorable habitats. The mole repeller circuit consists of two generators on microcircuits IS1 and IS2.
Bread board.

The generator on the IS1 chip sets the intervals for the operation and pause of the repeller. Using resistors R1 and R2, you can measure the intervals of the mole repeller. Usually 5 seconds work and 60 seconds pause. A second generator is assembled on the IC2 chip, which controls the relay through the key transistor T1. The frequency of this generator is selected within the range of 200-400Hz. The frequency setting of this generator is made by resistor R3.

This article is intended for creative people who like to do everything with their own hands, as well as an introductory material on the principles of operation of modern ultrasonic repellers.

An ultrasonic rodent repeller is an electronic device that emits high frequency sound waves that are not perceived by the human ear, as well as by pets.

But, rodents (rats and mice) hear them very well.
The main task of electronic repellers is to provide sufficient power of sound vibrations at ultrasonic frequencies that rodents can hear well (frequencies from 30 to 70 kHz).

Modern repellers provide power up to 100 dB (for comparison, such a sound is emitted by a jet plane taking off at a distance of several meters).

Diagram of a rodent repeller

This is perhaps the simplest electronic circuit. Even a novice radio amateur can assemble this repeller with his own hands. There is nothing complicated here.
In the presented design, the main device is a symmetrical multivibrator, which is assembled on the elements R7, R5, C6, C5, DD1.3 and DD1.4.

The generator frequency can be changed from 25 to 50 kHz. From the output of the generator, the signal goes to the power amplifier, and then to the sound emitter Sp1.

To calculate the frequency of ultrasound, you can apply the following formula:
F \u003d 1 / (R5xC6 + R7xC5), where the capacitances of the capacitors are calculated in farads, and the resistances of the resistors are in ohms.

Complicated electrical circuit of a rat and mouse repeller

This design is more complicated, but this one is much more effective than the previous one.

A distinctive feature of this scheme is the constantly changing frequency of ultrasonic waves, which prevents rats and mice from getting used to the sound radiation of the device.

The sound frequency changes automatically in the entire wave range from 20 to 50 kHz and is additionally modulated with a frequency of 10-30 Hz.

Frequency modulation here is repeated every 18 minutes.

The adjustment of this device must begin with setting the frequency of the generator.
The value of the resistor R6 is specified, which in turn determines the modulation depth of the ultrasonic generator.
By selecting the resistor R1, you need to set the frequency of the master oscillator to 30 Hz.
Next, connecting the outputs of the emitter and the base of the transistor VT1, we select the resistor R5 so that the ultrasonic generator operates at a frequency of about 50 kHz.
And finally, by connecting the outputs of the collector and emitter of the same transistor, we select the value of the resistor R6 so that the generation frequency is 100 kHz.
This completes the repeller debugging process.