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Acoustic repeller of drunks, drug addicts, thieves and other unwanted "guests"

Hello, dear authors, journalists, readers!

In this article I will tell you how I made an extremely simple, but effective device for scaring away drunks, drug addicts, thieves and other unwanted "guests". This device is also capable in certain cases to attract the attention of others. I’ll tell you how the tests went in a real situation.

Background.

I live in an apartment building. We don’t have a concierge. Although there is an intercom, it is not a hindrance for various undesirable persons. These are drunks, drug addicts, thieves. They penetrate the porch and crap on the floors, in the corridors, unscrew bulbs, prick, drink, leave cigarette butts, bottles, syringes. The police do not provide real assistance in the fight against them.

Several times I had a brawl with them.

At some point, this situation bothered me and I decided to put together a simple but effective device against these types.

I have previously manufactured such devices and from experience I know how they work. Sometimes, no less effective than the armed guard, which must be paid. And the device does not have to pay.

I collected this product from improvised materials in 2.5 hours.

Now we pass, in fact, to homemade.

The following tools were used:

Soldering Iron 25 W
Phillips screwdriver
Nippers
Scissors
Device "Third hand" (recently bought on Aliexpress)
Stationery knife
Multimeter

The following materials were used:

MGTF wire
Mounting wire
Cambric
Solder
Rosin
Solder fat
Solvent 646
Rags
Radio key fob
Siren
Button
Battery

Here is a diagram of the device. She is extremely simple.

The product OOPZ - 12 is a security and fire alarm siren. In common people - a siren, he is a howler. Sound pressure level not less than 103 dB. The sound is nasty. Amplitude, frequency modulated. In the region of maximum sensitivity of human hearing. Power supply 12 V, current consumption no more than 200 mA.


The alkaline battery (alkaline), type 23A 12 V. It is used in radio alarm remote controls.
Acoustic repeller of drunks, drug addicts, thieves and other unwanted

Button without fixing with a normally open contact from the system unit of the old computer.

The wire.

When you press the button, the siren is turned on. When you release the button, the siren stops.

I simply laid the siren on the floor in the vestibule, between the first and second doors to my apartment.

The button and battery I placed on the desktop. Above the table, on the wall, a small monitor is mounted. A video camera is displayed on it, which shows a common corridor, where there are several apartments. The camera is camouflaged under an electric box. The lens is a PINHOLE type camera (a hole with a diameter of two millimeters). It’s almost impossible to guess that a camera is installed there.

I connected the siren and the button with the battery by two wire lines of the required length. Holes in the walls did not have to be drilled, since the line used a fairly thin wire. He freely went into the slot under the second door, after which I shifted him to the very corner, from the hinges of the door. There, on the floor, lies a siren. It so happened that the wire does not interfere with the closing of the door and does not get underfoot.

At first I thought about how to reliably connect the battery. I did not have a ready-made container for this type of battery. I’m not sure that such containers exist. At least I did not come across.

Then I thought. The siren will turn on very rarely, for a short time, and the batteries will last for a year or more. In standby mode, the device does not consume energy. The self-discharge of these batteries is very small.

I decided to just solder the wiring to the battery. This, of course, is not right, but some do. I soldered to salt batteries and even to lithium-ion batteries (do not repeat, it is very dangerous, it threatens an explosion and fire!).

I cleaned the contacts with a knife, tinned it using solder grease and soldered two wires. Red is plus, black is minus. The remaining fat removed with a cloth moistened with solvent.

I took a multimeter and decided to make sure that the battery was not damaged. The device showed 1.4 V instead of 12. The battery became unusable.

I did not start making a homemade container, although I had everything I needed. Just in time it is longer than the manufacture of the whole homemade product.

I remembered that I have several unnecessary radio alarm key fobs that use such a battery. Dismantled one keychain. Two pieces of MGTF wire were soldered to the PCB sites where the spring contacts were soldered using the “third hand” device to hold the board. The use of MGTF wire is due to the fact that it is thin, stranded.


I marked the positive wire with a bundle. In one of the halves of the case, I cut with a knife two small recesses under the wires. Collected a keychain.

He measured the voltage on the wires with a multimeter. It turned out to be 12.1 V. This is normal. Of course, before assembling the key fob, I put in another battery, and not the one to which the wires were unsuccessfully soldered. At the same time, the thought came to me that the keychain can be used as a power indicator, without turning on the siren. When you press a button on it, you can roughly judge the degree of battery life by the brightness of the LED.

After that, he connected all the elements into a circuit by soldering. When soldering, I did not forget to put pieces of cambric on the wires. Then pulled them to the joints, providing insulation and additional mechanical strength. Wire line connected in a bundle. To do this, every 30 to 50 centimeters wrapped them in several turns of wire.

To verify the performance of the product, for a very short time, I pressed the button. I was convinced that the siren emits a powerful sound signal.

In conclusion, I’ll tell you about one case when I had to try this product in action.

Once he worked at a table, glancing briefly at a monitor. I see a suspicious type appeared in the common corridor. He examined the door locks of the apartments. Inspected very carefully, sometimes squatting. I put off work and began to watch him. It became clear to me why he was doing this.When a suspicious type came to my door, I took the button in my hand. When he leaned toward the lock, I pressed the button and held it in that position for about three seconds ...

103 dB in close proximity, plus the unexpected factor when doing a bad thing, it worked! The thief jumped two meters, almost banging his head on the opposite wall of the corridor. He froze for a second and rushed to the exit. I think that now he bypasses our house.

I hope this article was interesting and useful to you.

I will be glad to your comments and suggestions.

Sincerely, author.
7.8
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81 a comment
Author
pogranec, that's what he messed up with, it turns out.
I read news today. One man is trying to put. Do you know what for? is he 2 years tormented neighbors, including the neighing of horses xaxa He was already fined, but he did not calm down. Why did he do that? It turns out that the neighbors often played music and interfered with it. He didn’t agree, then he found a record of the neighing of horses and scrolled around them for days on end. In the comments, one woman wrote. Well done, originally thought up, right. Neighbors get me too with their music. Now some kind of article was presented to him, I read fluently, sort of until three years in prison. Of course they won’t put him in prison, but they can fine them, maybe they will sweep the street for a week ...

My personal opinion is that his neighbors should be forced to take revenge. Why do I think so? In my old apartment above me, a floor above, lived a neighbor. I've already talked about him, that he was doing weed right out the window. But this is not the worst thing he did. He cut into full music at night. And the amp and speakers were powerful. But that's not all. He minted for sale. Moreover, he minted by putting the blank on the central heating battery xaxa I speak seriously. And now, imagine? Deep night, at full Pink Floyd and chasing on a battery !!!!

You will certainly say. And what, it was impossible to call the police? They called and complained about him. Useless. And they asked him not to do that. Useless. The main thing is that he sleeps during the day, and wakes up at night, cuts in Mouzon and coins! They wanted to fill his face, but he, a healthy boar. No, well then stuffed, and not just the face. But neither we nor the music with coinage.

I told this to the fact that I also had thoughts to act on it in an acoustic way. But the snag was how to make sure that you and your neighbors did not interfere. I wanted to extrude him with infrasound, to get it difficult, but it was possible, but I read it in time in one smart book about the features of the spread of infrasound in building structures and changed my mind.

Now my neighbors are quiet, I have never heard that they turn on music. Silence, like in a coffin ...
The problem is not what he was selling. The problem is unwillingness to understand.
The equipment turned out to be very noisy - when turned on, a loud voice signal in Chinese was triggered, and on the device itself indicator lights were constantly on. All this distracted the child and prevented him from sleeping.
Author
It will be necessary, they will put a car DVR behind it, depending on what purpose it was used for. And this guy has all the problems due to the fact that he began to resell these "bulbs". If he used them for his own needs, this is another matter. Yes, he will not be anything for the first time.

And no one will show for video eyes on their own gate. Now, if you drill a hole to a neighbor and put a camera, yes, a violation xaxa
The law that draws where he turned, then it happened.
December 13, 2019, Ekaterina Suslova
In Moscow, consideration of the merits of the case of "spy" cameras has begun.Muscovite Denis Cabrera bought several devices resembling light bulbs to look after a four-year-old child, but then decided to sell them. The man was detained, accusing him of selling “special technical equipment for secretly obtaining information.” The prosecution insists that the devices are indistinguishable from conventional lighting devices, however, Denis and his wife believe that it is impossible to confuse the "video nanny" with the lamp.
Pronin
It looks like - we’ll put around the "bait"
And do not lead us into temptation ... ("Our Father")
xaxa
Author
Further. I already wrote about this, but I remind you that suddenly not everyone read. When you go to the store, even the most shabby, you can be sure that you are being shot by a camera and, most likely, not one. And the owner of this eatery did not consider it necessary to ask your Highest consent for unauthorized video shooting. Or maybe you think that he has special permission to shoot in this store, as well as in the surrounding area? Of course not. But he does NOT violate the law. Moreover, it helps to obey the laws. And when their violation occurs (robbed, beaten, killed someone, etc.), law enforcement officers turn and video recordings help solve the crime or prevent it. I have already given some examples from my practice and I will not repeat myself.

So, they wrote to me here that I allegedly violated the law by putting a hidden camera in a common corridor. I want to please, I also put one camera and it shows a parking lot near the house. This camera is not visible from the ground. What, too, violated? It was necessary to warn the bastard, who will unscrew the wheels? ireful And my peephole is also unusual, it’s a video xaxa What had to be written "Attention, I have a video eye, a viewing angle of 180 degrees. A compelling request. Walk down the corridor dressed, sober, clean-shaven and combed."? xaxa
Author
So, I talked about when it is impossible or undesirable to put cameras.

Now I will tell you in what cases it is possible. There were a few "thieves" who, with foam at the mouth, claim that they should broadcast a sign like "Smile, a hidden camera is shooting you!" And I want to ask them. When you take a picture of yourself or someone else on the beach, you ask permission from those who accidentally fell into the frame.
Perhaps one of them is unhappy (flax) that his belly (cellulite) fell into your frame. Here from this moment we will begin in more detail.

To be continued...
Author
The rich have their own quirks. I told him that it will not look very beautiful, especially since the children are already adults ...
I think it's pretty stupid. It looks like - we will lay out the “bait” in our (and other) bedroom, call friends-guests. And we will monitor and blame the CHILDREN for video theft in theft, obscenity, etc., etc. fool
And put a simple locker ?? I do not say sales - safe.
Remember, for a long time one radio amateur from the village (he was also involved in the artisanal programming of PIC). The identity among other ratsukh described how he thought up the defense of his barn. From rural juvenile (and other) punks. The door is open, but if someone enters a stranger (unknowing), it will slam shut on the inside of the bolt. And you just won’t open it. And only the owner will open it. Then Ineta was not like that. I wrote to him that he does not know the Criminal Code.
Author
But then the odds went. The son brought the girls home and he did not particularly like the fact that there was a video camera in his bedroom. From he began to turn to the side so that she did not show the bed. But he simply did not dare to simply tear or cut the wires. He feared the wrath of his father.

Moreover, dad promised to give him a jeep by the end of the institute, which he almost did not attend, like his sister xaxa

And the head of the family each time called me or my partner and we returned this camera to its original position. Honestly, it was very embarrassing in front of older children.

Fortunately, after a couple of months, they settled this issue among themselves and we turned off and dismantled this system. Equipment handed over to his son. I don’t know why it is for him. But I know for sure that Dad gave the machine to the end of the university. drinks xaxa
Author
The video surveillance system was mounted. Since one of the cameras was installed in the bedroom and the children knew about it, they did not appear there naked. Then they forgot about the cameras.

Soon the system paid off. Once again, a large amount of money disappeared. We looked at the record on the DVR and it became clear who stole the money. I was not interested in what happened next; I can only say one thing. Dad, mom, son and daughter were happy.

To be continued...
Author
At the same time, you can install cameras in toilets, showers, bedrooms, etc., if you have there is consent of personsthat will fall into the frame and they know about it.

Example. A few years ago, a friend contacted me. He asked to install cameras in the apartment where his adult children live. He explained why this is necessary. There are often guests. And several times in a strange way, money and expensive alcoholic drinks disappeared. Children do not need money and they will not steal for themselves, this is obvious.

We gathered in this apartment as a part. I am with my friend, the head of the family, his wife and their children. We discussed how many cameras there will be, where they will stand and what they will show. That is, all insiders are aware and agree.

To be continued...
Author
By the numerous requests of Readers, I will talk about the legal aspect of installing video cameras, both conventional and hidden.

Many believe and argue that installing cameras, especially hidden ones, is illegal. I wrote earlier that you can’t direct cameras at certain objects, for example, military ones. Do not install cameras in toilets, locker rooms, showers, bathhouses. You can’t install cameras in such a way that they show the private (intimate) side of people's lives, without their consent.
Author
Evgeny Fedorovich !

1) Do you explain to anyone that a keychain without a dummy receiver? Reread the article carefully. It says that the keychain I used was just like a container for a battery.

2) To whom do you explain that the AC-10 siren with a high current consumption? In the home-made, I used the siren OOPZ-12. The article indicates the current consumption of this siren. It is not very large and the used battery normally holds it during short-term operation. And no one will cut a siren for a long time. Re-read the article more carefully.

P. S. You wanted to show yourself smart, all-knowing, but it turned out the other way around. Keep in mind for the future. Criticizing the author of the article and homemade work without getting ready is a very risky business, you can screw it up. boss
Evgeny Fedorovich
This keychain is from the UMB-100 wireless panic button. It only sends a command to briefly switch the receiver relay. Without a receiver, it's a dummy. AC-10 siren with high current consumption.
So this is the complete "FUFLO" !!!
Author
Or maybe you are a thief. Stealing from the poor and the rich, while no one is at home.
Author
It is time to talk about camcorders and hidden microphones.
You claim that it is illegal.
Apparently you think when you go to the nearest pub and they listen to you and take pictures from different sides - this is legal!
Oh, they have a special license.
Nobody will ask you when and what to shoot.
But when the man was killed, the guys in the headquarters came to me and asked me to throw it on a USB flash drive.
Got it, no?
Lawyer, scare the investigation committee. For starters, learn what the investigative committee does.
Author
About 10 days ago I heard such a story on the radio.
A seasoned thief began to open (and opened) the front door to a pensioner. (USA).
But he did not take one into account, she is a bodybuilder, albeit an old woman.
She waited for this bastard to go into the hallway and ... just bring down the kitchen table on his dumb head.
Of course, this wasn’t enough for her, she puffed foam for depilation on her face and vented this scum with a broom until the cops arrived.

I’m not a woman, man, lucky that thief that I just scared him, well, they understood.
Author
I promised to talk about the rules for using such repellers. Move away from your speakers, take off your headphones ... Just kidding. Or maybe not...

Any (any) has the right to protect his personal territory, for example, entering his apartment by using noise devices.

Anyone who disagrees with me?
Author
It is immediately clear that you do not understand the topic. Go to any store for security systems. There you will definitely see the so-called PKP, control devices. So, almost all modern ones have

autonomous security function. I.e. Armed such a device and left the room. He returned, disarmed. And I forgot to remove it or strangers penetrated ... as the siren will give on ears !!! xaxa

You can absolutely legally buy such a device, a siren and another to it and put it in your country house, in a garage or apartment. And nothing will happen to you if it scares thieves.

And you talk about the rights of a thief, they say he did not threaten life. He threatened the property of citizens.

Well, about the cameras, then you will be additionally flashed where you can put, where you can’t. And about microphones, voice recorders too.

And then you argue here that the judge will not accept such a record, and the thief will accept the words. Have you ever been in court, participated in it?
... will say went to bask in a "difficult life situation."

Literally, last week. I watched a picture from above ... Below, at our entrance, 2 (or 3) drunks hustled and with them a young disabled person on crutches. They debated something and blamed someone. And they got inside the door through the door ... After some time, I looked in the courtyard of 2 police cars. One has a trifle on the hood, the cop collects it in a bag. And before him stands one of the drunks and explains something. The cop gathered everything and pointed the alcove to the next car. There he took another cop and into the car and they left. A disabled person (tipsy) also explained something, but he was not taken and he went to his house.
Guest Alexander
Sorry, you're right. And if this thief had broken something for himself when he jumped away, then in general "the excess of necessary self-defense".

"- But the thief didn’t physically threaten you? Well then, why did you harm him with your actions? How did he violate your rights?" - such will be the question for you from the judge.
Unfortunately, by law. A thief, after all, will not say that he stole, he will say he went in to warm himself in a “difficult life situation”.

Next, you set the security camera, secretly. (they didn’t write a complaint to the Investigative Committee, remove the information from the site, otherwise they will prove the intent! ps: they wrote to me, I know what I'm talking about) That is, you violate the rights of this wonderful thief to privacy. If you present the video as evidence in court, the judge will not consider it as "evidence obtained inappropriately." And most likely you will also receive a counterclaim.

I am not speaking abstractly, but as a man who did not allow one woman to claw her eyes out, and now proving that the openly recorded video was not a montage, and that I did not beat this woman with my head against the wall, and I held my hands only to keep my eyesight.
Valery
And better "Akhtung, Akhtung !! All the inhabitants of the dewen !! .. Vihadi to Geghaggatsya !!!."
Yeah, all the neighbors on the porch will come out, and such "akhtungs" are hung by the author, the swindler has already washed off, and the culprit of the noise is here! xaxa black_eye
Author
With infra-sound jokes are bad, you can’t hide yourself. These vibrations are well transmitted over building structures. I have made and tested such a device for a long time. Security officials did not approve, they said, indulge in ultra sound, scare away rodents, for example, mice! xaxa
Author
Valery Do not believe me, I am now soldering the executive voice module (I already ran goosebumps).
After such a voice warning even the deaf will run away xaxa
And better "Akhtung, Akhtung !! All the inhabitants of the dewen !! .. Vihadi to Geghaggatsya !!!."
R555
I replaced the actuator (siren) with a voice module.
Type: "Smile, you are filming a hidden camcorder!" xaxa
Author
Thank you, colleague, I know about this feature of registrars. Even in the old regions did this ... And in the new it is easily done.
There is such a setting in registrars as a private zone. She can block any part of the frame both for recording and for displaying online.
Yes, and the thief could crap, so now? I can hang toilet paper near the house.
Oh, I forgot, I’m a good cat, I still have to make a powder of red pepper and glass wool. xaxa
Then the thief can be found by the sound of yelling.
Author
According to recommendations Leobrynn and other respected persons of the site "Imdmyself.com", I replaced the actuator (siren) with a voice module.
ALEXYUSTAS
"Measurement for a second" - This he did in his pants!
Irbis
Hidden camera is a violation of the law.
I set up two ordinary IP cameras, one above the door, the other on the elevator, recording around the clock.
One statement to the police - and the problem is solved forever.
Guest Vladimir
To the author of the invention + 500. Also get homeless and drunks. Well, since you are such a passionate person, I want to offer a revision. Instead of the “fire alarm” speaker, set the signal used by the police, ambulance, etc. After the signal, the voice message “You have 10 seconds left to leave the danger zone” should sound. After that, a “beep” begins with a countdown of 10, 9, 8 ........ and from the keyhole let the vapor from the electronic cigarette. I am sure that after such a video sent to TV, the first place is guaranteed to you.
"This Ali Babaevich, this is a bad person, he dropped my battery on my leg, bastard!"
So drones must already be registered, even for flights over the toilet. Even family filming will be banned soon. Phones will need to stick stickers from masking tape on camera lenses. And they must be with an excise stamp. xaxa
Nenado, I am aware of these developments.
smoke
Author
I'm not sure about the purchase, but mine, home-made, will easily pull out xaxa I'll tell you later what can be done and how. I must say right away that I don’t have any. And then here the law-abiding dick divorced. Look, you tried to blame me for putting the hidden camera illegally.
"I showed the necklace
Cardinal Richelieu!
I wake up in the morning, I ...
Neither stakes nor Rishil !!!

(c) Folklore.
And my grandfather in an interesting way after the war was looking for a thief who steals firewood. (And not only him ... The reception was famous and widely lured). In an oak log along a blind hole, drill, fill with gunpowder tightly and hammer in an oak cork .... And the next day everything is clear: whoever has no pipe over the house is the thief ...
Author
UMB remember working with them. Then we will discuss. Now I want to show the assembled magnetometer before it is bought.
She does not pull out the igniter on current well.
Well, the receiver from UMB can fit you, I already have a better system.
Quote: Pronin
At night, he quickly put Akkum from the car with the circuit under the apple tree, threw a thin loop through the nearby bushes and connected to the exit. horn (4A) from the car.
Having read to this place, suggested a continuation: in the morning he wakes up - neither the battery, nor the horn. )))
Author
No. There are 6 such radio buttons. I just accumulated surplus. 2 or 3 of these key fobs went to the receiver, and many did not want to buy spare ones. And there are really no receivers left. Fortunately, the thread would be bungled on the basis of the tagplek tag.
Author
Leobrynn, do you really think that I didn’t use such pyro cartridge with indelible paint in my practice? By the way, what I bought was just 12 volts and were calculated. And in this homemade product of mine, the battery costs exactly 12 volts. Apparently, this is not just. xaxa

I could show how to make it myself from the available materials, but the Admin will not miss such home-made work. I read the rules in the Pyrotechnics section, however, fluently.
And in general, it is easier to put a pyrotechnic cartridge with paint. Then the thief tablet will be painted. You do not understand security systems - do not meddle!
Nifiga did not understand why you ruined the radio button? I stole the button, but the receiver - no? xaxa
Quote: R555
Pronin, well, how's the feeling? But this, when ready, you know that now you press the button. And the uninvited "guest" does not know. xaxa

He published his first signalization in railway Radio. It was a very long time ago, in the last century ... A colleague at the institute had a summer residence in a garden society. And on the plot there was a spreading apple tree, something like White Bulk. It can be seen, he says, from all the garden plots ... And when apples (bulk large) someone shakes them at night. He says he knows how to do it - across the path from the gate he stretched the fishing line to the house and tied an empty bucket at the end. Someone who goes to the apple tree at night, hooks on a fishing line, rumbles a bucket and falls ... And he fenced the site itself (welded) with a fence of steel rods. And he suspected the pensioner grandmother, who lived through the plot ... yes-yes
Everything was done "wisely", but it doesn’t work - to steal. And this crop for him had a commercial component. In general, he asked me for a while (ripening) my scheme. At night, he quickly put Akkum from the car with the circuit under the apple tree, threw a thin loop through the nearby bushes and connected to the exit. horn (4A) from the car. And he says - already late in the evening he was drinking tea in the house by the light of a light bulb. Silence ... and then when Klaxon buzzes intermittently (under an apple tree). I myself, says, got scared and almost fell off the chair. I jumped onto the porch ... nothing was visible from the light in the dark, I heard a mother curl, the fabric was torn, the bushes were cracking towards the road ... Then in the morning I already saw 2 bent rods in the fence (under 90 degrees) yahoo
And after this there was no encroachment, the crop ripened ... and some buckets of apples were sold at a local micromarket. And he treated me from the harvest ... yes
As my grandfather took revenge on the neighbors ... In a bag poop, a piece of paper and set fire to, ringing the door ...
And there is a traumatic technique, a brick in a package. Although, everything can be combined, but it is very tough.

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