home Heaters

Do-it-yourself burglar alarm for home and garden. Simple DIY burglar alarm Homemade door alarm

Sometimes there is a need for an independent inexpensive security alarm, for example, for protection in the country. The use of industrial designs in such cases may not be economically feasible.

What do we need from the alarm?
- Reaction to intrusion, for example with a passive IR motion sensor
- Intrusion alert by siren. The notification should work for a short time (for example, 5 minutes) and then turn off.
- After triggering, the system should return to standby mode. If necessary, it should work repeatedly.
- low current consumption for long-term (6 months) operation in standby mode.

To make such an alarm, we need:

Passive infrared motion sensor. For example, a sensor purchased from OBI is a light switch. The price is about 300r.
Siren at 12 V. In particular, a 105dB model was used, you can use any other. The price is not more than 200 rubles.
Other small things: Battery holder, 6 V relay, insulating tubes, wires.

So. We need to remake the motion sensor by switching it from 220V to 12V. A superficial analysis of the circuit showed that the circuit can operate at supply voltages from 7–8 V to 30 V. When supplying 12V, it is necessary to set the relay to 6V. (12 volt does not work). Let's open the sensor. The spherical part is removed by bending one of the supports. The halves are held on by snaps.

We take payment. As you can see, the sensor is a passive IR receiver that responds to a change in the amount of IR radiation that hits it and a simple optical system. The viewing angle of the sensor is 180 degrees.

Power must be applied to the points on the left. On the "+" positive pole and on the "-" negative from the power source. We will connect the relay winding to the points on the right. Dismantle the standard relay (black box).

Due to the lack of space inside the spherical part of the sensor, it was decided to bring the relay through the wires to the base of the case.

Power is supplied to the sensor through the switch. When the sensor is triggered, it supplies voltage to the relay coil. The relay is activated and the siren will turn on with its closing contacts. Thanks to the relay, you can connect a large number of sirens.

Bottom view. The siren and batteries are connected via terminals. Relay on the bottom left. Top right switch.

Complete system. ATTENTION! Do not turn on the siren without protecting your ears, despite its small size it is very loud and can cause hearing damage.

In the end it worked out. In accordance with the regulator on the sensor, you can set the time for the siren to work after it has been triggered. From 10 sec to 8 min. Install the sensor indoors and bring the siren outside. Unfortunately, after power is applied, the sensor is triggered, so it is reasonable to put the siren switch in a secret place and turn it on 5 minutes after the sensor is turned on. The switch can be switched by a key, like a car ignition switch.

The sensor turned out to be quite economical. According to the ammeter:
Standby current 700uA
Current in operation mode 1.1 mA
Siren current 200mA
A simple calculation suggests that 3.1 Ah is needed to work for 6 months. The capacity of an alkaline battery is about 2.5 Ah. Therefore, for the winter you need 16 mixed alkaline batteries.

Checking in the freezer showed that the system works even at -32

Added later: given our turbulent times and the autonomy of the system, it can be used to build a security perimeter in nature around a tent, for example.

Field trials showed:
1. Water glare causes false positives
2. It is possible to glue the sensor with segments of isolette so that it would form blind zones.

Modern society is simply unthinkable without burglar alarms. Security alarms can be both fire and conventional, working against intruders. It all depends on where it is installed, and what functionality it should carry. Do-it-yourself GSM alarm system is a relatively inexpensive and quite effective solution for guarding a garage or home.

Now there are a large number of companies that are ready to install an alarm system, including GSM. The scheme of such systems is not as complicated as it might seem at first glance. The main thing is to understand some of the nuances and it is quite possible not to resort to the help of third parties, but to make an alarm with your own hands. It will cost much less, and its constant maintenance will depend only on you. That is, you yourself will be able to repair it and carry out the service.

If you want to do it right - do it yourself

The widest distribution of such an alarm is in the garage. The simplest homemade GSM alarm system will help solve a number of problems, add confidence in the safety of the car.

What do you need to have to make an alarm with your own hands?

If you look closely at the above list, you can conclude that the cost of the future system is low. Such a do-it-yourself burglar alarm will last a long time if you follow all the following steps correctly.

Installation work

A good do-it-yourself GSM alarm system will work for a long time and work correctly if you follow these steps step by step:

In cases where shutdown and hang-up are the same, you need to solder the wire to this button. The second wire is soldered to the number key, which corresponds to the shortcut function. It is from him that your phone number is dialed. As for the hermecon, you need to use one that has a standard closure circuit.
In cases where the shutdown and release do not match, it is necessary to solder one more wire to another button. In this case, one of the wires will be common. As for the hermecon, the one that has three contacts is used.

Proceed with the installation of a closed circuit, working with the circuit. It is necessary to install a magnet on the garage door, and then adjust the reed switch so that contact with it means an open circuit.

The resulting burglar alarm works quite simply. If the garage door begins to open, then the contacts are closed using a reed switch. As a result, your phone receives a call. This serves as a wake-up call.

It is important to note that before starting installation, you should consider how to do the work so that the burglar alarm is the least noticeable to prying eyes. In addition, all elements must be protected from moisture.

In the list necessary for arranging the alarm, there is a switch. It just serves to turn the system on or off. Everything is very simple and functional.

You will immediately be able to appreciate the main advantage of arranging such an alarm. The fact is that it does not depend on the mains electricity. You will only need to timely charge the mobile phone that is used in the system. There are batteries that can hold a charge for more than two weeks. By the way, such mobile phones with batteries cost from 890 rubles and more.

In garages that have an electrical network, you can mount the adapter directly into the network. Then you will need to ensure that there are no power outages.

Nuance that is important to know

If thieves get inside your garage, which is equipped with an alarm, they can quickly find it and turn it off. At the same time, the alarm has a certain time for it to work. It only lasts a couple of seconds. At this time, the process of establishing a connection with the phone number of your mobile phone is in progress.

When the door is quickly closed, the call is immediately dropped. In order to prevent this, you can install another device to the magnet. It will have to prevent the magnet from opening the circuit.

The easiest option is to build a system in which, when opening the garage doors, the magnet will move slightly to the side. In this case, the magnet and the reed switch will not touch, and the circuit will not be open. You can return the system to its normal state if you simply move the magnet to its original position.

Currently, it is also recommended to install a video surveillance system. But this is an additional expense. In most cases, it is enough to have a do-it-yourself GSM alarm system that will help you find out in time that a stranger has entered the garage.

This article provides diagrams of the simplest electronic alarms, which can be done by anyone who is at least minimally familiar with electronics or simply knows how to hold a soldering iron in his hand. Such alarms come in handy in many cases. They can be put on the windows if there is a small child in the house who can open them. On the doors of an apartment or garage of a guarded parking lot. And when triggered, the watchman will call the police. You can put such an alarm in the apartment if you are friends with your neighbors. Even if you go camping, it’s not a sin to spread a security train around the camp at night in case of wild animals or strangers.

First scheme electronic signaling is simple to the extreme, there is nowhere easier. This is just one transistor, a resistor and an executive relay. If an audible alarm is expected, then instead of a relay, an audible siren or howler is turned on.

Principle of operation: A security loop is a thin wire, or a closed contact. When the wire is intact (or the contact is closed), the base of the transistor is grounded and the transistor is closed. No current flows between collector and emitter.

If you break the security wire, or open the contact, the base will be connected to the power source through the resistor R1, the transistor will open and the relay (or siren) will work. You can turn it off only either by turning off the power, or by restoring the security loop.
Such an alarm can be used to protect your belongings, for example. A reed switch is used as a security contact, the alarm is hidden in the side pocket of a bag or backpack, and a magnet is placed nearby. If the magnet is removed from the alarm itself (move the thing), the siren will squeal in all voices.

Second scheme with more advanced user features

As in the first case, a security loop, a normally closed (in armed mode) contact or a reed switch closed by a magnetic field serves as a sensor. If the loop is violated, an alarm is triggered and its operation continues until the power is turned off. Restoring the loop does not turn off the alarm, it will still continue to work for some time. The alarm has a button for temporary blocking, which is necessary for the owner to leave the protected area. The alarm also has a response delay, which is necessary for the owner to turn it off when he enters the protected area.

Let's analyze how the circuit works. Before arming the alarm, it is necessary to turn off (open) switch S1. It must be installed in a secret place near the entrance. You can use, for example, a hidden reed switch, which closes - opens by rearranging some object with a magnet built into it, etc. This switch blocks the operation of the system and it stops responding to a broken loop. When leaving, the switch S1 opens and the capacitor C2 begins to charge through the resistor R2. Until the capacitor is charged to a certain value, the system is "blind". And you have time to leave the object, restoring the security loop or closing the contacts. By selecting the values of resistor R2 and capacitor C2, achieve an acceptable output delay for yourself.

If the security loop is broken, then the capacitor C1 will start charging through the resistor R1. This pair creates a slight delay in the alarm, and the owner has time to neutralize it by turning on switch S1. It is necessary to choose the values of the resistor and capacitor for a comfortable response delay time.
If the loop is broken by an intruder who does not know how to turn off the alarm, then some time after the loop breaks, the alarm will work (both inputs of the D1.1 element will have a logical "1", respectively, at the output "0". After passing through the inverter D1 .2 it will again become "1" and open the transistor VT1. The transistor will discharge the capacitor C3 and open the transistor VT2 through the inverter, which will make the executive relay work or turn on the siren.

Even if the attacker quickly restores the loop, the siren will continue to work, since the capacitor C3 will charge through the resistor R3 for a sufficient time. It is the ratings of this pair that determine the operating time of the alarm after the loop is restored. If the loop is not restored, the alarm will work constantly.
Chip - K561LA7, transistors - any n-p-n (KT315, KT815, etc.) Power supply - any with a voltage of +5 - +15 Volts. The executive relay or siren can be connected to a more powerful power source than the circuit itself. In standby mode, the circuit consumes practically no current (at the level of self-discharge of batteries).

Sometimes it becomes necessary to install a simple and not expensive burglar alarm. Without unnecessary bells and whistles that manufacturers add to it in order to expand the functionality of their system and somehow distinguish it from other competitors. Dacha, garage, household extension or even a greenhouse, in such places it is not always advisable and profitable to install a full-fledged security system.

In this article, we will consider several devices that claim to be simple and accessible to anyone who wants to protect their property from the encroachment of uninvited guests.

What should such an alarm be able to do?

respond to an intrusion (some external influence - movement, the door was opened, hit, etc.);
give a sound signal to frighten off the intruder;
be able to arm and disarm;
It is desirable to consume a little electricity.

This device aims not so much to close access to the house, but only to scare away the thief. Hearing a loud signal, he does not want to take risks and will not climb into the room, in addition to the psychological impact, she can also attract the attention of neighbors.

Security alarm based on motion sensor

The simplest burglar alarm for a home can be made by hand on the basis of a conventional household motion sensor for lighting, which is installed in entrances to save electricity. But instead of a lighting lamp, you can install a siren.

What will be needed for this?

Motion Sensor- you can buy at any hardware store, such as OBI or Leroy Merlin. It is necessary to pay attention to the voltage of the sensor - we need it to work from a 220V network, the viewing angle - depends on the external design of the sensor (wall or ceiling) and the lens used (can be 180 degrees wide or corridor type). The average cost is from 400 to 800 rubles;
Siren powered by 220V. For example, PKI-3 "Ivolga-220", the average price is 250 rubles. Can be bought at radio stores;
Ordinary switch, to disable the alarm. Anyone will do, from 100 rubles. and higher.

The connection diagram is shown below:

The motion sensor must be chosen one that has at least two types of adjustments - time setting (TIME) and sensor sensitivity (SENS). With the help of the first one, it will be possible to set the time for the triggering of our alarm, i.e. siren sound time. This value is usually set for five minutes. The second adjustment changes the sensitivity of the sensor, for example, if it does not respond to you or to reduce the so-called "false alarms".

The switch will be needed in order to turn off the device when you are in its field of view and turn it on when you leave this room. It is advisable to install the switch discreetly, so that after activating the security alarm, you would not fall into its radius of action. In addition to the siren, you can also connect a regular light bulb for a double effect on the intruder.

The main disadvantages of such an implementation will be that after switching on, some models of motion sensors require from 1 to 10 seconds to “stabilize” and switch to standby mode. If you come across such a sensor, you need to add a time relay to the general circuit that will keep the siren turned off for the time it is turned on.

There are still miniature motion sensors on sale that operate on 12V, for example, model DD-03. You can also create a simple alarm on them, but you need to connect it to a 12 volt power source or a battery. Thanks to this, the system will be non-volatile and work even if there are power outages.

Security alarm system from a ready-made kit

The simplest security device based on autonomous signaling can work without wires. In shops for radio amateurs, you can find two options - based on an infrared sensor (aka movement) or a magnetic contact sensor that responds to opening. True, the choice is not large enough and often you have to go shopping to find the goods "in stock". Therefore, the easiest way to purchase this product is to order it in one of the major online stores.

Kit based on infrared sensor.

An example is the Chinese alarm system under the loud name "Alarm mini". It consists of the IR sensor itself, an installation bracket and one or two key fobs. The kit comes with clear instructions for installation and operation. Separately, 4 AA batteries are purchased separately, but can also be operated from a 6V power adapter (sold separately). Doing the installation yourself is not difficult.

After inserting the batteries into the device, you need to install the unit itself in such a place that its lens is directed to the protected area. There is an infrared receiver window on the front panel to control the alarm from remotes. A lens that "captures movement" in the controlled area, operation lights and a siren.

We press the button on the remote control - the green LED lights up, which means that the report went to the exit (15-20 seconds) in order to have time to leave the apartment. Then the green eye goes out - the device starts working. Now, as soon as there is any movement in the room, a person will pass, a dog or a cat will run, the red LED will light up and after 15-20 seconds a very loud siren will sound. The device is working!

Kit based on magnetic contact sensor.

An opening sensor-based burglar alarm is a basic unit that has a sensor with open contacts and a magnet to close these contacts. You need to set them against each other so that there is direct contact between them. If a thief entered the house, when the door or window is opened, these elements move away from each other and an alarm siren sounds.

Such an alarm can be used mainly to scare off intruders, and its main advantage is its low price, about 100 rubles per sensor. And very easy installation, there is adhesive tape on each part, just peel off the protective layer and stick the sensor on the front door or window.

Often such kits are used to protect the perimeter of the house at the moment when you are inside, for example, sleep at night. The sound of the siren will wake you up and you will be able to take any action to protect yourself.

Burglar Alarm Simulator

In urban high-rise buildings, it is becoming popular to set the apartment on guard, in this case, expensive equipment is bought to protect against intrusion, and the signals are transmitted to the control panel of the security company. But not every owner can afford this, and it is not always justified.

Remember on cars such a device, under the windshield, usually near the steering wheel, there is a red LED that blinks or constantly glows? He warns that the car is guarded. So for an apartment or a summer residence, there are similar designs or in another way - imitators of a security alarm. They are designed to frighten away unprepared and unprofessional thieves or burglars.

To make such a simulator, you need to buy a red LED (for example, such an AL307), a mounting box for its placement, a 100 Ohm resistor, a switch and a compartment for two batteries. For the whole set, you will need to pay about 100 - 200 rubles. Depending on the characteristics of the LED, a current-limiting resistor must be connected to it in series. The radio store will help you choose the right resistor (unless, of course, you have the Soviet AL307 LED, as in our example).

When leaving the house, we turn on the constantly glowing LED, when we return, we turn it off. Strangers will think that the apartment is on an alarm.

The alarm system is intended for protection of various objects of apartments, offices, dachas, cars and bicycles. And also to warn and inform people in case of emergencies.

With the opening of the dacha season, the question of the protection of dacha property brought for the season is particularly acute. Home-made and purchased systems for detecting and hacking based on wireless sensors and gsm modules for signaling an alarm or triggering have gained the greatest popularity among gardeners. Many of the considered alarms and designs are perfect for do-it-yourself repetition. In addition to typical security sensors, these systems can use other additional equipment, such as smoke, flood and carbon monoxide sensors, gsm sockets, etc. In the framework of this article, we will consider a burglar alarm for a summer residence and a private house, which you can assemble with your own hands.

The principle of operation of laser signaling is as follows: when an object enters the beam coverage area, the laser stops illuminating the photodetector. The resistance of the latter increases sharply and the relay turns off. The relay contacts also turn off the laser. This is a variant of the simplest scheme.

When a laser beam hits a photoresistor, its resistance tends to zero, and when the laser is turned off, its resistance increases dramatically and greatly. The photoresistor must be placed in a closed case.

In the role of a laser in this alarm, a ready-made module with a red emitter from a cheap Chinese pointer is used, which is easily removed from the case with your own hands.

A selection of simple do-it-yourself alarm schemes, mainly for premises. Using a reed switch or a microswitch with normally closed contacts as a sensor, the circuit also has a delay in turning on the alarm when leaving the controlled room, and a slight delay in triggering the alarm when entering.

A selection of simple sensor alarm circuits for the protection of various objects, recommended for self-assembly with your own hands. The principle of its operation is based on direct sensory contact and the triggering of one or another type of alarm indicator from it.

Ready-made types of alarm systems for cars are given, as well as methods for their installation, refinement and modernization. In addition, a selection of various home-made alarm options for do-it-yourself manufacturing is considered.

In the first signaling scheme, a simple autoguard is considered, which successfully worked on a VAZ car, in the second part, a similar design is considered, but with a minimum set of radio components

As observations of the operational reports of the Ministry of Internal Affairs show, the largest number of thefts from closed premises are committed through opening the door. Even the presence of a safe door with English locks will not provide full protection. Therefore, to reduce the risk of theft, I recommend installing a homemade alarm on the door, which will play the role of active protection. Yes, and experienced thieves, seeing a homemade product, cannot know what it is capable of and will choose another object for attack.

The principle of operation of the first two self-assembled circuits is very simple, you just need to monitor the integrity of a thin wire secretly stretched across the territory of a protected facility or in it. The attacker does not notice and tears it, thereby triggering an alarm that is transmitted by a mobile phone call to a pre-set number. The article discusses two options for the device - simple on electromagnetic relays and more complex on transistors and microcircuits of the K561 series

A bicycle alarm for your iron horse will work if you apply some kind of vibration effect to it, that is, it is easy enough to touch the bike and the alarm will work. The disturbing sound signal of the alarm lasts 30 seconds, and after a few seconds, it repeats and so on until the bike alarm is turned off.

When leaving your home for a long time you need protection from thieves - an alarm with a motion sensor is a great option. The sensor can be mounted on the wall next to or above the door, on the ceiling or anywhere else. The principle of operation of the device is as follows: when motion is detected at a certain distance, an audible alarm is triggered.

This burglar alarm is a simplified version of the army analogue, which is used when it is necessary to ensure the protection of the camp or any other object in the field. The disadvantage of this design is one false alarm, which may be due to a fallen branch, a forest animal, or a similar break in the motion sensor, which is a thin copper wire.

The sensor responds to an increase in air temperature to a certain value and to a certain level of smoke. The level of smoke is determined by the dimming of the gap between the infrared light and photodiode. The temperature is controlled by a thermistor, the sensor is triggered at 45 °C, but this temperature can be easily changed within +20 °C. The home-made radio is powered by the main 9 V signaling unit and consumes a current of 10-11 mA.

HOME CCTV SKOD OPS ITS PRODUCTS

HOME SECURITY ALARM SYSTEM

HOW TO CHOOSE – WIRELESS AND ADDRESSED – GSM SYSTEMS – KITI

Here we will consider the structure of emergency equipment for a private house, which is used as a place of permanent residence.

Choose from three options:

autonomous security system;
GSM alarm;
centralized protection with remote control (PCO).

I will immediately point out that the last point in the country is not important, because the distance group will not be more than ten kilometers apart.

Moreover, the backbone of any security system can be signaled autonomously, which can be converted to GSM and console security versions with relatively few changes.

So, - offline burglary.

The composition of such a system for a private house is mandatory:

security sensors;
sound and light warning devices;
power unit.

This is the so-called subject part of the alarm system, which is part of any system.

Add a GSM module and you can monitor your home's security status from your mobile phone. By connecting this equipment to a notification system (SIS), you can protect your property with CCS.

I would like to draw your attention to the fact that many SPI modules and equipment can act as control devices and boards. In this regard, it is better to immediately decide how you will use your alarm system - to reduce costs.

However, this is not mandatory, you can use the standalone version for some time and you can equip it with the necessary devices if necessary.

HOW TO CHOOSE A SECURITY ALARM FOR YOUR HOME

Regardless of the size of your home property and the type of alarm without sensors (detectors) you cannot do. First, they will have to block windows and doors. Sometimes, detectors protect walls and ceilings from potential demolition attempts or otherwise destruction.

In general, it is better not to be thirsty and install security sensors on all windows on the ground floor of the house and, of course, on the front door. Windows must be locked for both opening and breaking.

The first of these is achieved by installing magnetic contact detectors in the second case of sound (sound detectors).

The same goes for upper floor windows if there is less convenient access from the outside: canopies, stairs, slanted roof slopes, etc.

Now about motion sensors. Their installation is unequivocally necessary for possible intruder intrusion methods, when the external building objects of the house penetrate through unprotected signal systems, for example, through walls or roofs by breaking or dismantling.

Believe me, if you additionally place such detectors in rooms with window openings, it will not be redundant.

The next step is to select a control device for receiving (control panel). If we are talking about a wired alarm, its sensors are combined into an electrical circuit called loop (AL).

On the other hand, one of the main functions of the control panel is its information capacity, that is, the number of connected signaling lines. Their number usually ranges from 1 to 20.

A simple stand-alone do-it-yourself alarm system

No matter how many safety sensors the alarm circuit has when the system is triggered, you can learn the most from the loop number of the serial cycle.

This does not apply to addressing systems, but for the moment we are looking at the cheapest hardware options for home devices - a system that cannot be solved.

There are several cycles - the higher the level of detection of detectors. Therefore, it is recommended to reduce the entire safety net to the following areas (AL):

the perimeter of each floor;
sensors for the volume of the first floor;
front door.

Thus, for private home alarms, the minimum is a four-wire device (one cycle reserved).

If the house is large or complex, it makes sense to separate each of these hinges into larger ones, such as the front and rear. That's why you need a device with more information capacity.

Audible and visual warning devices must be selected. The main thing to pay attention to is the design (installation on the road or indoors) and the operating voltage (as agreed with the receiving device).

It's all quite simple, and at the end of this home security kit article, we get special hardware models that can be used for our purposes.

to come back to the beginning

WIRELESS ALARM FOR THE HOUSE

Where it is technically or aesthetically practicable, installation of wired lines in a house (or part of it) is not possible or unwanted wireless security equipment is used. Let's see what are its obvious advantages over traditional systems.

low performance and fast installation;
the ability to measure the system;
Wireless alarms are also being considered.

In the first paragraph, everything is clear and does not need explanation, so we start right away.

System scaling.

Simply, it is an opportunity to expand (install additional sensors) during operation. In addition, the wireless system simplifies configuration changes.

Here we mean the transfer of equipment to another location and its integration across regions. The first approximation can be considered as a signal loop.

Since each wireless sensor has the ability (and needs to) to assign a unique address in the same system, information about this can be recorded in different parts of the receiving device.

Likewise, when installing a new sensor, you only need to reprogram the hardware to reflect the changes.

Signaling address principle.

The main thing that I have already mentioned is that each sensor in the signal has its own unique address, which makes the system (processed) uniquely identified and controlled according to a specific algorithm.

Targeted alarms can be:

wireless;
the wire.

In the second case, only one two-wire line is used to connect all sensors.

Power is supplied separately and can be distributed in different configurations. Wireless detectors are powered by built-in batteries.

Keep in mind - the number of sensors associated with one device in addressable systems is not limited, but for a private house, most likely, it is enough.

Consider this when choosing an addressable wireless system. Although in a private house most types of equipment are enough for you. For example, "Astra 812" allows you to connect up to 192 wireless radio sensors.

In addition, there are a number of organizational and technical solutions that allow increasing the information capabilities of wireless systems.

A few words about defects.

There are few of them, and some of them may be important.

So, what are the disadvantages when installing a wireless alarm:

expenses;
lack of continuous monitoring of the communication channel;
the need for accidental battery replacement.

I won't talk much about the price - if there is no choice, you need to buy one way or another. If there is an alternative, the wired option for the equipment will be cheaper anyway.

As for the installation, it should be considered in every case, if you do not set the alarm clock at home with your own hands.

The lack of channel monitoring is due to the fact that it is impossible to determine the status and operation of the radio channel sensor at any time. Likewise, with 100% certainty, we cannot say that in the event of an alarm situation, we will receive a corresponding notification.

This does not mean that wireless systems are unreliable, but this factor must be taken into account in case of strong electromagnetic interference.

Battery replacement is not required, on average once a year.

It is true that they have a decent price - a few hundred rubles, but you do not need to save money by buying cheap counterparts. Most detectors have a low power warning capability so you don't need to measure the voltage separately.

to come back to the beginning

GSM ALARM FOR HOME

As mentioned at the beginning of the article, you can change each alarm to GSM (cell) by installing the appropriate module.

The requirements for home equipment with security sensors are the same for each protection version selected. If we are talking about receiving a control unit, it is in all respects more practical to immediately install the device with the appropriate transmitter.

This eliminates the need for additional settings, switching, etc. The requirements for GSM devices are similar to those for other devices.

First of all, it is information capacity.

The choice of GSM alarm even for a private house is discussed in more detail on this page. There is also an overview of some popular systems.

If we are talking about the performance of the wireless network of cellular systems, they have the same advantages and disadvantages that are typical for the "classic" options. The only thing that picks up the GSM wireless signal isn't as rich as you'd like, but the systems themselves won't always look solid.

If there was no choice of the right option between the manufacturer's solutions offered by the manufacturers, then every other radio channel system, consisting of:

wireless sensors;
receiver;
relay block.

The relay unit is connected to a conventional wired GSM device.

Of course, you cannot control any sensor in this case, but 8 areas for a house will be enough, in which the detectors must be combined according to the above principle.

Depending on country houses, especially for frequent absences, useful hosts acquire a GSM alarm device that has the ability to connect various sensor control parameters: temperature, water or gas leakage, lack of light and related control methods and technical systems.

The basic principles of organizing such protection are suitable for a private home.

to come back to the beginning

SETTING THE HEALTH ALARM FOR THE HOME

I will tell you right away: the assembly of alarm equipment for each house is very individual, so the kit will be difficult to pick up. I have never come across such offers other than GSM dialing. Therefore, devices and sensors in the correct number must be selected independently.

We will need:

movement, opening and opening of sensors;
receiving and control device;
power unit;
sound and light transmitters;
cables, wires and other consumables.

The number and type of burglar alarms required in the kit depends on the number of buildings and rooms that you will block (see the chapter on choosing an alarm for your home). There is also a rule for determining the information capacity of a device.

Now about nutrition. It must provide a working (rated) current sufficient for the operation of all detectors. Therefore, we accept and summarize the consumption flow of all detectors taken from their passport data. Choose the right power supply. In general, our alarm clock is formed.

Finally, there are some special models of burglar alarm equipment that you can use in your kits. I will never advertise them, I have just worked at various times with the equipment listed below and I have no major complaints about it.

Wired alarm sensors:

movements - Aster, Rapid, Photon;
breaks - Astra, Harp, Glass;
opening — detectors of the IO 102 series — ***.

Receiving control devices: VERS (very rich choice of modifications), granite, quartz, note.

Power supplies: Scat, Reserve, RIP, Sail, BBP.

This applies to the configuration of wired non-address signaling - the simplest and most budgetary system.

Such equipment is fully compatible with each other in different variants and combinations.

It is better to choose a set of wireless alarms from the director of one manufacturer, in addition - one model line.

The Astra RI-M radio station is very popular.

One of its advantages is a large set of sensors of various types of work and purpose: security, fire, leaks, etc. In general, it is very rich in terms of generating alarms of various configurations and system capabilities.

If we are talking about wired systems, we can pay attention to the range of Orion equipment manufactured by NPO Bolide.

Wide range of tools, good interface, customizable programs and settings.

to come back to the beginning

© 2014-2018. All rights reserved.
The materials on the website are for informational purposes only and should not be used as recommendations or normative documents.

Do-it-yourself alarm for an apartment - autonomous power supply and a reed contact intrusion sensor. The device described in the article is designed to sound an alarm about entering an apartment through the front door.

The alarm starts sounding a few seconds after the door is opened, and if it is not closed during this time, it will sound for as long as you like.

An attempt to close the door in the hope of turning off the alarm will not be successful - it will still sound for a few more minutes even after the door is closed.

The circuit contains two electronic keys on transistors VT2 and VT3 and an alarm turn-on delay unit on transistor VT1, the collector circuit of which includes a magnetoelectric sound emitter with a built-in AF generator BF1.

The door opening sensor - reed switch SF1 - is included in the gate circuit of the transistor VT2.

How to make a burglar alarm for your home with your own hands

While the front door of the apartment is closed, the reed switch installed on its lintel is opened under the action of a permanent magnet fixed on the door and located in the immediate vicinity. The voltage at the gate of the transistor VT2 (relative to the source) is zero, so it is closed. Closed and transistors VT1, VT3.

When the front door is opened, the magnet moves away from the reed switch, it closes and the capacitor C2 is quickly charged through the resistor R1.

As a result, the transistor VT2 opens, the R7VD3 circuit is connected to the power source and the transistor VT3 opens, which closes the power circuit of the node on the transistor VT1. Charging begins (through resistor R2) of capacitor C1. When the voltage on it reaches a value of approximately 0.7 V (this will happen after 5 ... 10 s), the transistor VT1 will open and an alarm will sound.

It will sound indefinitely if the door is not closed. However, even after closing it, the alarm signal will not stop immediately - it will take about four more minutes before it turns off. This delay depends on the capacitance of the capacitor C2.

Capacitor C3 shunts the sound emitter BF1, which increases the stability of the node on the transistor VT1. Circuit R5C4 contributes to the rapid discharge of the capacitor C1 through the diode VD1 after closing the transistor VT2.

About the details.

Resistors - any small-sized, all capacitors - imported oxide. To connect the sensor and power supply, screw terminals DG306-5.0-02P are installed with a distance between contacts of 6.3 mm.

You can use any other connectors or do without them altogether by soldering the wires from the sensor and power source directly to the corresponding pads on the board.

You can power the alarm for the apartment from any 9 V source - a galvanic battery 6F22, a battery made up of six AA cells, or a power supply unit.

Since the security device does not consume current in the standby mode, it can be operated with the power always on. A more complex scheme of a security device, but with a mobile phone, is here.

SECURITY ALARM

* SCHEME * EQUIPMENT * REQUIREMENTS *

It is obvious that the security alarm system is designed to detect unauthorized entry of the intruder into the facility that is equipped with it.

Conventionally, it can be divided into two parts:

object (equipment installed at the protected object),
console (equipment located on the centralized security console).

The main characteristic of any security system is its effectiveness.

The following methods of ensuring it should be noted:

Reliability - the probability of failure-free operation, which is provided by the equipment manufacturer and the quality of installation.
Reliability of intrusion detection, achieved by minimizing false alarms (determined by the use of competent design solutions).
The probability of detecting an intruder. It is achieved by the completeness of blocking by technical means of vulnerabilities, the paths of the probable movement of the intruder.

In addition, to increase the effectiveness of the security alarm, the principle of boundary, as well as early detection tools, is used.

For example, blocking walls with vibration detectors makes it possible to detect an attempt to breach the wall before its final destruction.

Measures to increase the fortification of the object by engineering and technical means should not be neglected. These include metal doors, grilles, protective glazing. Of course, by "shackling" the entire object in armor, the signaling can be abandoned. But we are talking about a reasonable combination of engineering and technical means and security equipment.

Let me explain with a concrete example.

With an external deaf metal shutter 10 mm thick, a criminal can be transported for half a night, but the alarm will only work after the window is broken.

As practice shows, after that, a few minutes are enough to penetrate the object, steal valuables and hide.

The detention group will not physically have time to arrive at the scene of the crime. Access to a much weaker structure, installed on the inside of the premises, is possible only after a violation of the security alarm loop.

10-15 minutes spent on overcoming it significantly increase the chances of detention.

The psychological factor should also be taken into account - a competent criminal always evaluates the quality of the object's protection. If it is equipped properly, then the risk will simply not be justified.

ALARM SCHEME

It should be said right away that a typical scheme for constructing an intruder alarm system will be given here - something between structural and fundamental.

Connection of specific devices and detectors is carried out according to the scheme given in their technical documentation. However, the general principles of organizing a signaling loop exist and are described, for example, on this page.

So, the classic version of the burglar alarm circuit for a summer house, house or apartment is shown in Figure 1.

control device (panel),
power unit,
optoelectronic detectors,
acoustic detectors,
magnetic contact sensors,
sound and light alarms.

The alarm loop of the 1st security line (perimeter) blocks windows (for breaking - with acoustic, for opening - with magnetic contact detectors), as well as emergency exit doors, hatches.

If necessary, vibration sensors can also be included (conditionally not shown in the diagram) to detect wall breaks.

The second frontier of the security system contains optoelectronic devices (volumetric, surface and beam operating principle).

Instead of them or together, radio wave and ultrasonic detectors can be installed. Again, in order not to clutter up the diagram, I did not indicate them.

The entrance (working) door is connected separately. This is due to the fact that in order to prevent the alarm from triggering when the object is closed and opened, a response delay is set on this loop. If the arming and disarming of the equipment is carried out from the outside of the premises, for example, with Touch Memory keys (position No. 7 on the connection diagram, then the front door can be connected to the perimeter of the object.

It is worth noting that for a small cottage or apartment, the above option is quite acceptable. However, for a private house with a large number of rooms and windows, it is better to break each security loop into several (Fig. 2).

This is explained by the following reasons:

convenience of localization of the place of possible penetration,
simplifying troubleshooting.

Of course, when using an addressable signaling system, these problems disappear - everything is determined there up to the detector.

ALARM EQUIPMENT

The composition of the burglar alarm equipment includes at least:

detectors;
receiving and control devices;
power supplies;
annunciators;
the object part of the notification transmission system (SPI).

Burglar alarm detectors are designed to detect unauthorized entry to a protected facility. This equipment differs in the principle of operation, respectively, in the purpose and ability to solve the problems of controlling the internal volume of premises, destroying various building structures, opening windows, doors, etc.

The next, no less important component of the equipment is the control panels that process the information received from the detectors and control other alarm devices. They are classified according to many different parameters, more about this is written here.

The power supply performs two main functions:

provides signaling equipment with the voltage necessary for its operation from the 220 V network;
in the event of a power outage, it acts as a backup source.

For reliable operation of the security system, it is necessary to correctly perform all calculations of the voltage source.

This cannot be neglected. See about it here.

Annunciators inform about the status of devices and detectors.

They are acoustic, light and combined. Their information content can be different, for example, light indication blocks can simultaneously reflect the state of dozens of alarm loops, and sound ones can broadcast quite complex speech messages.

How to make a burglar alarm for a private house with your own hands from a cell phone?

However, the latter is more related to the equipment of fire systems.

SPI are used for console protection. For autonomous alarm systems, they are not needed. The type of this equipment is determined by the security company. The transmission of notices is carried out by wire or wireless. Radio channel and GSM systems are used more and more often.

Apparently, in the near future they can take a leading position in the field of transmitting information about the state of security systems.

Installation of security alarm equipment.

If we talk about regulations, then the main document that determines the procedure for the installation and installation of technical means of security alarms is RD 78.145-93. This is a regulation of private security. On the one hand, if the alarm is not sent to the OBO remote control, then it can be neglected.

On the other hand, this document is intended to ensure the reliability and completeness of blocking vulnerabilities. Thus, it can be useful in any case.

In addition, the technical passport of any security equipment contains general recommendations for its assembly and installation. As an additional source of information, the documentation for the detector or device can be very helpful.

As for the connection diagram, here deviations from the manufacturer's recommended option are unacceptable.

There are considered quite a lot of issues related to the installation of various types of equipment.

SECURITY ALARM REQUIREMENTS

The main requirement for a security alarm is its reliability.

It is achieved by a whole range of organizational and technical measures, namely:

the most complete definition of places vulnerable to penetration into the object;
a competent choice of technical solutions for their blocking;
achieving maximum fault tolerance of the security alarm system.

The first issue should be resolved at the stages of drawing up the terms of reference and designing the system.

Here an important role is played by the experience of the developer and his good knowledge of regulatory and technical documentation. Each object has its own characteristics, so it makes no sense to give correspondence recommendations here.

The second point implies the choice of equipment that is most appropriate in terms of its technical characteristics to the tasks solved in each specific case by the security alarm system. Often, reliability is increased by the simultaneous use of detectors with different operating principles, as an option, it is possible to use combined (combined) sensors.

Fault tolerance, by and large, implies high requirements for the time between failures of all components of the system. In addition, the quality of installation plays an important role here. Electrical contacts have always been the weak point of electrical circuits, and they tend to deteriorate over time.

Therefore, proper maintenance is a prerequisite for the reliable operation of the security system.

There are two more points to note:

exclusion of interference in the operation of the alarm by unauthorized persons in order to disable individual sensors or the system as a whole;
the presence of the function of self-diagnostics of equipment for the timely detection of possible malfunctions.

The complex fulfillment of the above requirements can significantly increase the reliability and efficiency of the security alarm and its trouble-free operation for a long time.

© 2010-2018. All rights reserved.
The materials presented on the site are for informational purposes only and cannot be used as guidance documents.

SECURITY SYSTEMS FOR A PRIVATE HOUSE

ALARM - VIDEO SURVEILLANCE

Modern security systems are increasingly installed by owners of private homes, in an attempt to increase the level of overall security and prevent intruders from entering.

At the same time, each owner independently chooses a system, guided by his own ideas about the organization of the protection of his property.

Therefore, it is very important to study the principle of operation of the equipment on the market, taking into account its effectiveness specifically for private homes.

In general, security systems for the private sector can be divided into two broad categories:

The best option is considered to be a combination of the listed equipment - round-the-clock video surveillance + burglar alarm with different types of sensors and a feedback function.

The difficulty of choice lies in the fact that both burglar alarms and video surveillance can have several options at once. For example, wired and wireless, with and without remote access, as well as with the possibility of full integration into modern Smart Home systems.

For private houses, wireless devices are mainly used, since their installation is simpler and can be done independently. In addition, during the installation process there is no need to lay communications, violating the aesthetic characteristics of housing.

However, some experts consider wired systems to be more reliable, since the radio signal can be jammed or distorted, disrupting the performance of burglar alarms and video surveillance.

As far as remote access is concerned, here the technical means of security are divided according to the possibilities of control through the global Internet network and through GSM standard mobile communication channels.

The first option is characterized by almost unlimited access (you can track the status of devices from anywhere in the world where there is access to the network).

The GSM standard is distinguished by its ease of use - all notifications are sent to the owner's mobile phone. Through calls and SMS, you can also remotely control the equipment.

But taking into account the accelerated development of LTE mobile networks, Internet video surveillance systems are becoming increasingly popular among buyers.

Most manufacturers are already releasing special software for smartphones that allows you to realize intuitive control and provide convenient viewing of video in real time.

Given the variety of existing security systems, detailed information will be provided below, both on security alarms and video surveillance.

ALARM FOR PRIVATE HOUSE

One of the "disadvantages" of private households in terms of security is a large number of places where intruders can penetrate - windows, doors, attic.

It is also worth considering that valuables can be located in the local area, so it is necessary to additionally ensure the protection of the perimeter.

A similar situation is negatively reflected in the final cost of a home alarm set, but neglecting to install even one sensor drastically reduces the efficiency of the system as a whole.

Fire safety deserves special attention. Available models of smoke detectors and temperature sensors have appeared on the market. Therefore, more and more specialized companies offer complex solutions, when both security and fire sensors are connected to one central unit.

Installing the latter allows you to fix the fire at an early stage and minimize possible damage from a fire. And in the Smart Home kits that are gaining popularity, they additionally mount gas leakage and water leakage sensors.

When choosing a suitable configuration of a fire and security alarm, its type is taken into account:

autonomous;
with connection to the centralized security console;

The first option is low cost.

Perhaps this is the only advantage in comparison with other options. When the sensor is triggered, the signal is transmitted to the control panel, which triggers a light and sound alert. A sufficiently loud siren and a bright glow of the lamp can scare off the intruder, as well as attract the attention of neighbors.

At the same time, an indication of the operation of the equipment in the operating mode is provided, which additionally has a psychological impact on the attacker.

The main disadvantage of an autonomous burglar alarm is low information content, limited by the light and sound signal zone. This feature is critical for fire alarms. If the owner is absent, and the neighbors do not respond to the siren, then the fire will have time to cause significant damage to the building and property.

If an autonomous alarm system is already installed, it is recommended to supplement it with a GSM unit. This will expand its functionality and increase the level of security.

The alarm connected to the centralized security console is the most effective option, since information about the operation of the sensors is transmitted to the employees of the private security company, who promptly arrive at the address of the facility and independently carry out the necessary actions to prevent theft and detain the offender.

The disadvantages of console security include the need for a monthly payment, as well as the impossibility of connecting the system if the house is located at a considerable distance from the city and is not included in the zone of activity of the private security company.

Another option for remote protection is possible if the object is located on the territory of a cottage town.

As a rule, organized cottage settlements have a developed infrastructure and their own security service. In this case, an alarm connected to a centralized security console is the best solution in terms of cost and implemented security level.

DIY simple burglar alarm

To date, this is the most affordable option, with sufficient functionality. Of course, in terms of overall efficiency, GSM technologies are inferior to console security, but if the latter option is not available for a number of reasons, then an alarm system that transmits information to the owner’s mobile phone is the best choice.

The most common variant of GSM security alarms is wireless systems. They allow you to connect a large number of security and fire sensors (about 200, possibly more, depending on the brand of equipment).

Thus, it is possible to completely close possible penetration zones and ensure a high level of fire safety.

A good example of a wireless GSM alarm system is the equipment of the Chasovoy brands.

The disadvantages of wireless GSM signaling include the need for careful monitoring of the state of power sources (each sensor is equipped with a built-in battery or accumulator), as well as a possible vulnerability to various "jammers".

The last drawback is typical for cheap "no name" kits manufactured in China and operating at a fixed frequency (usually 433 MHz).

Sensors and central GSM remotes from well-known companies usually operate at variable frequencies that change in a chaotic manner, so their hacking or jamming is beyond the power of an ordinary attacker.

It is worth taking into account the dependence of GSM alarms on the signal level of the mobile network. If the GSM connection is intermittent, you should take care of strengthening the cellular connection and choose a central unit with a network outage notification function.

VIDEO SURVEILLANCE FOR A PRIVATE HOUSE

Even 20 years ago, video surveillance was classified as an elite system, with a very high cost, inaccessible to most owners of individual houses. But over time, the cost of video cameras and recorders has dropped significantly, and the proliferation of personal computers and the increase in Internet coverage has allowed companies to launch affordable private video surveillance solutions on the market.

The following video surveillance systems are most popular:

autonomous;

with remote viewing.

The first option is a set of video cameras connected to the recorder.

Video files from cameras are stored on the hard disk of the recorder for further viewing. Also, such complexes are often equipped with a monitor, for example, for monitoring the perimeter.

That is, the autonomous system will simply record the fact of intruder penetration, which will help in the further investigation of the crime.

In detached houses, low-cost stand-alone video surveillance is often used, using cheap IP or analog cameras and a PC with a video capture card as a recorder. In the future, such a system can be upgraded for remote viewing.

More modern Internet video surveillance systems allow you to view the image from the cameras in real time.

For remote video surveillance, popular online services are often used, offering various tariffs, as well as their own sets of IP equipment (for example, the Ivideon service). This is the easiest solution to set up, allowing you to install and configure an effective remote video surveillance system in a few minutes.

The cost of classic IP video surveillance is usually less than the use of cloud services, especially if the provider initially provides a static (white) IP address.

However, in order to independently connect and configure IP video surveillance in a private home, it is advisable for the user to learn the basics of building computer networks and specific terminology.

The most advanced and easy-to-use remote video surveillance system is based on P2P technology, commonly used for exchanging large amounts of data. P2P cameras do not require a static IP address, and connecting to a WIFI network takes just a few minutes.

At the same time, most online video surveillance services also offer the use of P2P standard equipment.

With all the advantages of remote video surveillance via the Internet, such options for a private house have a significant drawback - the vulnerability of the communication channel. For example, if a potential attacker knows that IP video surveillance is used in the house, he can simply cut the incoming network cable.

To ensure the proper level of reliability, it is recommended to duplicate the communication channel.

For example, install one more expensive, but stable P2P camera connected to a 3G modem.

It is also necessary to provide backup power (it is no secret that before penetration, criminals usually de-energize the entire house, in the hope that video surveillance will simply turn off).

A plus will be the option of notifying your phone or smartphone about the transition of equipment to a backup power source.

If you objectively evaluate the above methods for organizing protection, the best result is shown by combinations of different solutions.

For example, GSM security and fire alarm + P2P video surveillance. A budget option would be an autonomous alarm system, and the same video surveillance.

But, regardless of the method chosen, it is necessary to strictly follow the recommended rules for installing and operating the equipment. The best option would be to contact specialists who will help you choose a place for installing cameras and sensors according to the building plan.

HOME CCTV ACS OPS ITS ARTICLES

HOW TO CHOOSE A GSM ALARM

SYSTEM OVERVIEW

Since the number of proposals for GSM security systems can puzzle even a trained person, let's learn how to choose the right parameters and options.

Having decided on this, you can proceed to the choice of a specific model of the GSM system. In doing so, you must pay attention to:

number and type of inputs for (loop) sensors;
the possibility of remote control (the presence of feedback from the facility equipment);
availability and type of outputs for controlling external devices;
way to power the GSM module (device);
programming and setup procedure;
additional options such as the ability to connect temperature sensors, etc.

First of all, we decide what kind of wired or wireless system we need.

This way we filter out a huge number of offers and save our time.

Please note - the wired or wireless data transmission method for GSM alarms applies only to the sensor-device (module) connection.

The transfer to your phone is always carried out wirelessly - this is obvious.

Now in more detail about the choice of the characteristics and parameters listed above.

Number of inputs.

For wired systems, this value characterizes the number of loops that can be connected to a wired device.

A loop is an electrical circuit that combines several alarm sensors (detectors). Since the GSM module transmits a notification about the state of the loop as a whole, we will not receive information about a specific triggered sensor in its circuit.

If such localization is fundamental, then only one detector should be included in one loop.

And vice versa, if you need to receive a message only about an alarm situation that has arisen without specifying the place of penetration, then you can combine all the sensors into one loop.

This makes it possible to choose a GSM signaling module with a small information capacity, which will cost less.

for summer cottages, apartments - 1-4;
private (country house) - 4-8;
garage - 1-2.

The presence of feedback and the ability to control additional devices.

Some GSM systems allow, by sending SMS messages, to request the status of devices and perform certain actions.

For example:

arm/disarm the object;
control the on/off of the executive relays.

The first option is relevant for objects of any category, the second is worth paying attention to when choosing a system for a private house or apartment.

The fact is that it is convenient for controlling heating and water supply systems.

For a summer residence, this is most likely superfluous, but if there is a desire to heat the house with an electric heater before your arrival, then this option can be purchased.

Do not forget about the electrical safety rules and pay attention to the current (power) switched by the contacts of the GSM relay of the device.

By the way, let's return to the first point concerning the types of inputs for sensors. If you choose an alarm with the ability to control engineering and technical equipment such as heating and plumbing, then it will be useful to automate these processes if the GSM module allows you to connect temperature sensors, water leakage, etc.

firstly, you can control these parameters or their thresholds online;
secondly, you can program the device to automatically control various external systems.

GSM alarm power supply.

It is optimal to use a mains voltage of 220 V.

This is especially true if you use an alarm system with a large set of additional options. For a house or apartment, no problems are expected here.

Security and fire alarm in the house

Most of the dachas are also electrified.

Keep in mind, in addition to the alarm unit, you need to provide power to the sensors. With a significant number of them, the self-powered option will be technically difficult and expensive to implement.

Programming and setting.

The Plug and Play principle is applicable only for simple GSM signaling devices. For more or less "serious" systems that we just talked about, you will have to install the necessary operating modes. Therefore, the way in which this can be done is of no small importance.

The best option is the ability to configure using special utilities through a personal computer.

Therefore, ceteris paribus, preference should be given to GSM alarm devices with similar functionality.

Climatic performance.

Assess the conditions in which the alarm you choose will be operated. Even when installing in a room where a high degree of climatic protection of the equipment is not needed, the operating temperature range must be taken into account.

When choosing a specific model, pay attention to the presence of a detailed and competent manual. If it is absent or indistinct descriptions of the possibilities and the setup process, it is better to refuse to purchase such a product.

OVERVIEW OF GSM ALARMS

I bring to your attention a brief overview of some GSM signaling systems, their capabilities, as well as brief comments on possible applications.

I want to note that all the systems considered here have a full-fledged manul (description), so they won’t sell you a pig in a poke.

Xital GSM system.

The manufacturer rightly positions it as a cellular control and warning system.

The model board contains devices with a set of all the necessary options for a private country house - from a burglar alarm to the ability to control heating and other equipment.

I see no reason to list the functionality, since the system has everything you need and almost nothing more.

Quite professional and reliable for its price range (from 7500 rubles).

Line of GSM equipment "Sapsan".

Similar to the previous system, it has a wide range of features. Supports work with radio channel sensors. In addition, this manufacturer offers wireless video intercoms, as well as MMS modules that can connect video surveillance cameras with instant image transmission and support for video calls.

In principle, there is something to pick up both for home and for giving. The order of prices is comparable to the Ksital system - not an economy class, but worth the money.

GSM alarm "Taurus".

Simple security system, no frills. Suitable for a small cottage. Able to protect and additionally transmit information about the temperature in the protected area. May be of interest to those who need a self-powered alarm system.

The manufacturer claims a year of operation from a set of built-in batteries.

Somewhat alarming is the lower limit of operating temperatures -200C. Even for the middle lane, I would like to have a larger "minus" margin.

Sets of GSM alarms "Karkam".

The minimum security alarm set contains:

GSM module;
wireless opening sensor;
control panels;
wireless motion sensor;
siren and power supply.

All this costs about 5000 rubles.

In addition, for certain models, an additional connection of wired sensors is provided. For many summer residents, this may be an interesting option.

Signaling devices of the Express GSM series.

The manufacturer of this equipment is NPO Siberian Arsenal - a manufacturer with a stable positive reputation.

The range of the GSM model range may not be very wide, but it is quite interesting for the owners of small objects, which include summer cottages.

The most popular and well-known are the following devices, which, by the way, have autonomous power supply:

Express GSM - a device that combines a transmitting module and a motion sensor;
Photo Express GSM - in addition to the previous device, it has a built-in video camera that transmits an image of a protected area when a motion sensor is triggered.

Despite the presence of additional devices that can be integrated with each other and the specified equipment, all this is inherently a small burglar alarm system and nothing more.

By the way, Express GSM is ideal for a garage.

In this review, I do not claim to be complete information. There are other GSM alarm systems, I know them, but those listed in this article are the most attractive to me. All data are taken from open sources, are for informational purposes only, are not guaranteed to be reliable and can only be considered as an expression of the personal opinion of the author of the material.