Homemade electromechanical door locks. Do-it-yourself unpickable invisible lock. Additional equipment for any type of electric locks

The article will tell you about the designs of electronic locks available on the market, from it you will learn the principle of operation of locking mechanisms, the types of electronic lock control systems used. Reading will help you do right choice electronic lock.

The use of electromagnets and servos has made it possible to change the understanding of the design of locks. A new generation of locking mechanisms uses a commanded electrical impulse (usually 12 V) to move the bolt or create clamping force. direct current). This made it possible to use in the locking part of the door electromechanical locks, differing in design from classic mechanical locks, which generally increases the security of the home from entry by unauthorized persons.

With the help of microprocessor control systems associated with electromagnetic or electromechanical locks, access to the premises of a certain circle of people is easily organized, remote control door locking mechanism or opening the door without a classic key. All this is almost impossible to implement using standard mechanical locks.

Due to the simplicity of their design, electromagnetic and electromechanical locks are able to safely withstand tens of thousands of opening and closing cycles, which is beyond the capabilities of conventional mechanical locks.

Based on the principle of organization of the locking mechanism, modern electromechanical locks can be divided into the following main groups:

1. Electric deadbolt locks.
2. Invisible locks.
3. Electric motor locks.
4. Electric latches.
5. Electromechanical locks.

Based on the control systems installed in them, locks can be divided into four types.

Radio controller

These systems can recognize both specialized key fobs and operate on standard frequencies of Wi-Fi or Bluetooth networks. In the latter option, a standard tablet or smartphone can be used as a “key”.

Code keyboards

The simplest and most common technical solution for electronic lock control systems. To activate the lock mechanism, you only need to enter a specific code, so there is no need to additionally purchase different types of keys.

The main “disease” of this control system is the erroneous operation or failure of the digital remote control keys, which is due to the peculiarities of its design. Over time, the contact plates oxidize and may not close the contact or distort the supplied signal, which leads to erroneous operation of the buttons. Therefore, all locks with keypads require regular maintenance.

Contact key controllers

One of the most common solutions on the electronic lock market. The lock allows you to memorize a certain amount of contact keys made in the form of a keychain or a plastic card with a magnetic strip. The system has a high degree of reliability.

Proximity key controllers

This system allows you to work with special radio-magnetic cards, which are activated remotely (at a distance of 10-15 cm from the reading device).

Electronic lock combining control using a code, contact key and radio key fob

Let us consider in detail all types of electronic locks, their advantages and disadvantages.

Electromagnetic locks

Electromagnetic locks are less similar to classic mechanical locks than other electronic locks. They consist of three main parts:

1. Electromagnet plates.
2. Reciprocal metal plate.
3. Control systems.

These electronic locks are widely used as a locking mechanism on metal entrance doors. The microprocessor system that controls them operates both in intercom mode (reads and processes information from the keyboard and remote handsets) and analyzes information from contact keys.

Advantages

Thanks to the high reliability of the electromagnetic lock in combination with the significant force of attraction of the plate to the lock (50-500 kg), such a door guarantees a sufficient degree of protection of the premises from third-party penetration. The installed electromagnets and the outdoor part of the electronic lock control system are protected from moisture, which increases their reliability.

Electromagnetic lock for 230 kg

After being disconnected from the power supply, electromagnetic locks can operate for a short time on a battery connected to the control system. After the battery is discharged, the electromagnetic lock will automatically open.

Flaws

The disadvantage of this system is the poor noise immunity of the communication lines of the control system with handsets installed in each apartment feedback, which can lead to the failure of the entire system during a severe thunderstorm.

Self-repair and installation of this system is rarely done, since it involves a large amount of work installation work followed by setting up the control system.

Electric deadbolt locks

This type of locks is similar in its appearance with a classic mechanical deadbolt lock. Can be completed various systems control, which ensures its versatility.

The system includes an electromagnetic bolt wire, which can be used to both open and close the door. Some models, thanks to built-in spring return mechanisms, ensure automatic closing or opening of the lock in the event of a power failure.

Advantages

The electromagnetic mechanisms installed in these locks are highly reliable, significantly exceeding mechanical locks of similar class. A number of models are equipped with a door condition monitoring system, which eliminates spontaneous operation of the locking mechanism when it is open.

All models are easy to install and configure; installation and maintenance work does not require special knowledge, which has led to their high popularity.

Flaws

Inability to open the door if there is no power to the lock.

Since this lock consists of an electromagnet, return springs and electronic system control, its repair is reduced to checking the functionality of the magnet and the condition of the springs, and maintenance is limited to lubrication of moving parts and replacement of bushings and return springs. When the lock is equipped with a control system that works with contactless keys or with radio control, they can be used as “invisible locks”.

Invisible locks

This type of locks is specially designed for hidden installation. Both electronic deadbolt locks and compact latch locks can be used as these locks. Invisible locks can be installed in various parts of the door leaf, or built into standard mechanical locks, which significantly increases their resistance to burglary.

The lock comes complete with a control system that reads signals sent via a radio channel. Radio networks can be used as a signal source for opening and closing an electronic lock.

The lock is powered from a separate power supply (usually 12 or 5 VDC). Auxiliary battery power supplies are used to independently power the lock during a power outage. When purchasing an invisibility lock, you need to pay attention to the condition of the locking tongue, best option- when the tongue is initially retracted.

Important: if there is no power for a long time, the self-closing lock will not be able to be opened.

Advantages

This lock is quite simple in design and contains a minimum number of working components, making it easy to set up and, if necessary, repair.

Flaws

Cannot be used as a separate locking mechanism due to the simplicity of the design.

Electric motor locks

This type of locks is no different in its capabilities from electric deadbolt locks. Its main difference is the use of a compact electric motor to move the locking mechanism.

A feature of some locks that use an electric motor as a driving element is their integration into a single control unit. Control units can process information both from the keypad and from various types of key fobs.

These electric motor locks are installed directly on classic mechanical locks with a cylindrical cylinder. With their help you can easily and with minimal costs time and effort to convert a classic mechanical lock, replacing the conventional lock cylinder with an electric motor one.

Example of an electric motorized invisible lock

Advantages

Low power consumption and, as a result, the possibility long work when powered by classic AA batteries.

Disadvantages also include the complexity of the mechanism, which requires regular Maintenance, including maintenance of the locking mechanism controlled by mechanical and electric drive.

Operating principle of an electromechanical lock

Ready-made solutions based on various types of electronic locks:

Thanks to the simple combination of electric locks with various types control systems, you can create an access system of any complexity that provides high level burglary protection.

The ability to open remotely or process wireless radio signals of various frequencies by the control system and simplicity of design are the main advantages of electronic locks over mechanical ones. The simplicity of the design of actuators and the versatility of control systems increase the reliability of systems built on their basis.

To protect the house from unauthorized entry, locks are installed on the doors.

Classification of locking systems

According to the degree of protection and the opening mechanism, products can be divided into the following groups:

• constipations - hook, latch, etc.;
• locks – mechanical, electromechanical, electromagnetic.

A simple option for the unlocking method is constipation. They do not contain a secret locking mechanism and no keys are used to unlock them.

Of the locks that have a mechanism, the simplest option is mechanical devices. To open or close them, you need a key, which is inserted into the well and, depending on the design, either turned or moved back and forth. As a result, the mechanism is triggered and the door opens.

An electrical signal is used to control electromechanical and electromagnetic devices. They allow the use of a remote control to open the system remotely. Can use fingerprint or palm print, voice control etc.

Depending on the type of device mounting, there are:

• invoices,
• mortise,
• mounted

According to the type of locking mechanism, they are divided into lever and cylinder.

Locks can be purchased in specialized stores or at the construction market, or you can make them on the door yourself. It is much more difficult to find a key for such a lock; it is assembled from high-quality elements, and only the developer knows the layout of the secret part.

Homemade latch lock

The operating principle is as follows: a bolt (like a furniture bolt) is installed in the door, which is turned using a hex key. The bolt passes through the entire thickness of the blade. On back side On the sash there is a rail (latch), which is attached to the bolt. For this purpose, a flat flat is made at the end of the hardware. This is done using a needle file. The rake is placed on the flat. To prevent the steel plate from falling off the bolt, it is supported with a nut, which is screwed on one side and the other of the latch.

To lock the door, the latch must be in the striker.

Now, to open the door, insert a hex key into the head of the bolt and turn it. Simultaneously with the rotation of the bolt, the latch also turns.

Hidden mechanical device

The trick with this latch is that it is difficult to find the head of the unlocking bolt on the surface of the blade.

Do-it-yourself mechanical cunning constipation

You can make your own valve. It is a metal plate that looks like in the picture.

A small hole (about 10 mm) is made in the sash. The key rod has a plate at the end that can rotate around its axis. When the key is inserted into the keyhole, the plate and the rod form a single straight line. A limiter is marked on the rod, and the key is inserted into the hole clearly along this limiter. Next, the plate lowers under its own weight and is fixed in one of the slots on the valve.

To prevent the rail from falling out when moving, a limiter or stopper is installed for it, made in the form of a stop and two supporting brackets. Thus, on the one hand, the movement of the rack is controlled by a stop - a limiter, on the other - it moves to the first bracket.

Such a system can only be opened by its own key, made for this mechanism, since it is impossible to determine from the outside the length of the plate attached to the rod.

Electromechanical door device

When the door is locked, the bolt, consisting of a rod and a head, enters the striker, and the spring associated with it is stretched or charged. The spring is connected to a coil or solenoid. When the power is turned off, the spring is released and the bolt is retracted into the lock.

Attention! If there is no electricity, the lock can be opened from the outside using a key, and the door can be opened from the inside using a special lever or button.

Electromagnetic device

To understand how to make a magnetic lock with your own hands, first consider its structure.

Device

The main element of the mechanism is an electromagnet, which is a core made of transformer steel in the shape of the letter W. This steel does not have a memory effect and is a soft magnetic material. The core is made from a large number of thin plates or is made from a single plate.

Around the core is a winding of copper wire coated with enamel. The coil has a large number of(up to a thousand or more) turns. When passing electric current An electromagnetic field is created along the winding in the core, which controls the operation of the lock.

However, over time, the mechanical characteristics of the door weaken due to the effect of residual magnetization. To combat it, use the effect of changing the polarity of the voltage when demagnetizing the locking device. However, in this case, force must be applied to open the door.

Due to the absence of moving parts, the device has a long service life.

Since low-alloy steel, which easily corrodes, is used for the manufacture of structural parts, they must be protected. For protection, varnishing, galvanizing or nickel plating is used.

The main parameter of the mechanism is the door holding force. To increase the force that is used to hold the door, it is possible to install several locks. This value depends on the material from which the core and armature are made, the current strength and the number of turns in the coil winding. Performed as overhead type.

Electromagnetic or electromechanical mechanisms are installed on fire doors, input structures in hallways, etc.

Types of electromagnetic devices

Depending on the operation of the anchor, structures are divided into holding and shearing. In retaining models, the anchor acts on separation, and in shear models, it moves in the transverse direction.

For holding-type devices, when voltage is applied, the resulting magnetic field in the armature-core circuit keeps the sash from opening.

For shear-type devices, the armature has holes, and the core has protrusions for these holes. When voltage is applied, the armature is brought to the core and attracted to it. In this case, the protrusions of the magnetic circuit fit into the corresponding grooves of the armature. In this case, the holding force is characterized by the force that must be applied to shift the anchor, and design features protrusions and holes.

Shift structures are installed using an insert into the end of the leaf and, thanks to this, this type allows you to install a secret magnetic bolt on front door.

Assembling a simple electromagnetic lock with your own hands

Let's consider one of the options for assembling the mechanism.

To assemble an electromagnetic lock that can be opened using a remote control, you need to:

• Push-button mortise panel.
• Power unit.
• Electromagnetic relays. If we are going to open it with a four-digit code, then we use at least 5 relays.
• The castle itself.
• Button for opening the door from the inside.
• Reed switch and electromagnet.

A keypad, for example, model KBD-10B, can be purchased on the market.

Thus, you can assemble any type of lock with your own hands. And it is important not only to build and beautifully decorate a house or garage, but also to protect it from unwanted visitors with a reliable lock.

Electronic locks are now replacing conventional locking systems. More recently, these locks were used only in public buildings.

An electric lock for the front door has many advantages when compared with standard locks of any class:

1. The mechanism of many locking devices has long been familiar to “interested parties.” Well, the well itself and the handle will tell a professional a lot, but choosing necessary tools and the methods of work are already a trivial matter.
2. These locks are not visible either from the inside or from outside doors, because They dont have keyhole. It can be installed anywhere along the entire area of ​​the door; if you want to break in, you will have to find it first - this is not feasible without a special device. The advantage of an electric lock on the front door is that they do not have mechanical keys - in frequent cases they are lost, and they are also easy to counterfeit.

This lock can only be opened with plastic cards, touch keys, a GSM beacon, or a signal from a radio key fob, based on the principle of entering a code. The most advanced electric locks are capable of reading biometric parameters, for example, the retina or fingerprints of the owners of a house or apartment.

An electric lock for the front door is sold everywhere. The cost of electromagnetic ones is much higher compared to electromechanical ones. The advantages include reliability, wear resistance and excellent anti-burglary performance. The price may depend on the modification of the lock. Approximate cost locks – from 1 thousand rubles.

Advantages and disadvantages

The advantages of the simplest electronic mechanical locks include the fact that they are opened from the outside with a key, and from the inside - with a special button.

For example, if a key is accidentally pressed and a person remains at home, but the door is not slammed, the door will remain open. There are also electric motor locks. They include an electrical control structure for the bolt (locking the door) and an electronic motor that controls the bolt.

The bolt is locked in such a way that it is impossible to press the door itself. In addition, these locks can work in different modes, bolts can close in different ways, it depends on the level of protection at the moment of closing.

Simple design features friction-free locks give an advantage to electric locks on the front door. They hold the door closed thanks to their powerful electric magnet, which attracts food with energy. They are trying to somehow combat this problem by using a variety of additional devices.

Electromagnetic locks should not be installed if there is no source of constant power supply. The newest, faster and more reliable structure is a solenoid lock that controls the bolt thanks to a magnet. The advantages include combined electric motor and magnetic structures. This system will also work when the electricity is turned off, and the door itself will be closed.

Important point! Electric locks come with different control structures - both remote and contact. They use electronic locks, magnetic cards, radio key fobs and keys with a code. The disadvantage is that they are dependent on energy consumption.

Types and purchase of electric locks

Electric locks are electromagnetic and electromechanical:

1. The first type of lock is based on an electromagnetic field created by applying voltage. Thanks to its effect, the mechanical bar reliably fixes and holds the door in the closed position.
2. An electromechanical lock operates on a short-term voltage supply. This system does not require a stable voltage - energy is supplied only when the door is opened.

An electric lock can be purchased for use together with an intercom, a keypad with a code and a device that reads plastic cards. You can buy this lock and put it on any door; these locks are predominantly equipped with devices that specifically close the door and are thus able to ensure the operation of any electric and electromagnetic locks without any interruptions.

If you purchase an electric lock, you can also consider the closing speed; it is determined by special control valves. The system of this closure must correspond to the weight and dimensions of the door.

You also need to make the right choice of electric locking structure.

These basic properties should be taken into account:

• slamming;
• power off;

If you purchase an electric lock, you will need another battery; it needs to be changed after three years. It is possible to purchase both a rim lock and a mortise lock; they open remotely and close when slammed. On this moment It is possible to purchase an electric lock with a variety of additional capabilities. For example, if the lock has the Hands-free property, the door will open without hands. This function is indispensable for summer residents and lovers of shopping.

Review of the best models and prices

Overview by installation method:

Mortise electromechanical

Cost from 1400-1600 rubles.

They have high security and secrecy, since the lock itself cuts into the door, and the handle remains visible. These locks can be opened with keys.

Overhead electromechanical

Cost from 1000-1200 rubles.

Their assembly is easier compared to mortise ones; they are installed on the door from the inside. They are usually used for doors made of metal or wood.

According to the method of controlling the bolt:

Motor class

Cost from 600-1000 rubles.

These locks are quite reliable, have a long service life, but are also the most complex. They have a DC electric motor - it opens the bolt. If the door is closed, the bolt cannot be released due to the pressure of the electric drive. There are brands of locks with several bolts, multifunctional operating schedules, the disadvantage of which is the opening time.

Solenoid locks

Their cost can be from 300 rubles.

They operate from electromagnetic windings. The bolt, which is the core, is retracted past the barrier created by the spring due to the electromagnetic field powered by the coil. These locks have a relatively low cost.

Platoon class locks

The cost of such locks varies from 200 to 600 rubles.

Locks are used to keep doors closed against springs; they are cocked during closing and then unlocked using an electric pulse. They do not require constant power supply.

What to look for when choosing?

1. When choosing an electric lock for your front door, you need to pay special attention to functionality, methods of opening and closing, and class of designs. For example, if the choice is electromechanical, you should know which door the lock will be built into. This lock can be right or left, and it opens inward or outward.
2. The electromagnetic one is much more reliable, its opening method is remote, and it also has no rubbing parts.

Installation and configuration

To correctly install an electric lock, you should take into account all the points, and this means making all measurements, without any errors, so that all existing devices function normally. Be sure to tighten all existing bolts tightly so that they do not come loose when opening and closing. The next thing you need to do is be sure to test the lock itself.

The location of the device may depend on the nature of the building. In the case of using an intercom with an electromechanical lock, you can use a structure with two or more panels that can be controlled from all rooms.

To correctly configure the electric lock on the front door, you first need to consult a specialist, because Not every door can have a lock. The price may depend on the type of lock and the door itself. The owner's requirements must be taken into account. If you install it yourself, you can send a photo of the door, but again, be sure to consult with professionals. They will help you choose correct device, they will give everything necessary information to correctly install the electric lock with your own hands.

Electronic combination lock - circuit diagram

This scheme exists in different variations, and on different counters ( K561IE8, K561IE9, K176IE8, CD4022 and the like). I modified the circuit based on CD4017 (decimal counter divider with 10 decrypted outputs QO...Q9). Analogue microcircuit CD4017(Johnson counter) is K561IE8, K176IE8. I found a microcircuit with the designation EL4017AE, which I used in this device. When repeating a device, do not be lazy, identify the markings - they differ in characteristics (operating voltage). All necessary project files are .

So, the working of the electronic combination lock circuit is very simple. When the correct four-digit serial code is entered, a logical one appears at the output of the microcircuit (Q4), which leads to the opening of the lock. When you dial an incorrect number (buttons S5-S10), which is not part of the code, the circuit goes to its original state, that is, it is reset through the 15th pin of the microcircuit ( RESET). When S1 is pressed, a single state on the third pin Q0 of the microcircuit is supplied to the input of the field-effect transistor VT1; when it opens, it supplies voltage to pin 14 ( CLOCK) which switches the single state to the second pin Q1, then when the buttons S2, S3, S4 are pressed sequentially, the signal goes to Q2, Q3, and ultimately, when the correct code is entered from output Q4, the signal opens transistor VT2 to a short time, determined by the capacitance of capacitor C1, including relay K1 which, with its contacts, supplies voltage to the actuator (electric lock, latch, or automobile “activator” (actuator)).

There is one thing, the code cannot consist of the same digit. For example: 2244, the values ​​must be different, like: 0294, etc. Anyway, possible options There are a lot of codes, about one ten thousand, which is quite enough to use this combination lock in everyday life.

About the details of the combination lock

Now about the design of the castle

The scheme is simple, tested, it has been working for a year and a half without problems, in hot and cold conditions. And most importantly, it’s easy to repeat! You buy radio components, you can use the circuit board.

As a drive for the lock, I used a simple automobile electric drive (actuator). The kit also includes fastenings - metal strips that need to be redone, as can be seen in the photographs. It all depends on what kind of lock is used for the renovation. You can install a ready-made electric strike from the company FASS LOCK Itemno:2369 (8-12V,12W). In this case, the capacitance of capacitor C1 is changed so as to obtain a time delay of 0.5-1s.

In my case, I attached a metal strip to the plastic handle of the lock, attaching it directly with self-tapping screws. From it to the drive, a spoke is put on (comes complete with the activator), and then the electric drive itself is also attached with self-tapping screws to the base of the door. The relay board is installed on the door and wiring from the keypad and power is supplied. As a body, I used plastic cover from under the coffee, drilling two holes for fastening.

The keypad for dialing the code is made from the remainder of the aluminum profile U-shaped, For furniture facades, can be bought at any store furniture fittings. The profile is cut based on the number of buttons (10 pcs.). After this, you need to drill holes for the buttons, the diameter is slightly larger than the diameter of the button, so that the button with the cambric (tube) on it fits into the hole. This way it will be centered and, as a result, move freely when pressed, without jamming. This is done so that when filling the buttons with glue there is no mixing, but more on that later.

Filling buttons

It's time to secure the buttons in place in advance. drilled holes. We insert the cambric into the buttons and put them in their place, as can be seen in the photo. Afterwards, you need to fasten them with drops of glue or hot melt glue. But this must be done carefully, so that there are no gaps left if the buttons are filled epoxy resin! Because my first panel, filled with epoxy, remained as a museum exhibit. The epoxy is very fluid and it seeped into the buttons and glued them together. Like this. I had to do everything anew and this time I filled the panel with hot glue. The buttons can be pre-glued, so as to secure them in place, with a two-component, instant glue used by furniture makers for gluing MDF, sold in the same place as aluminum profiles - in furniture fittings stores.

Of course, before pouring, you need to solder all the wires to the buttons and LEDs as you can see in the photographs. All this ensures a reliable, waterproof and non-removable keyboard, as well as Beautiful design, which is applicable to any entrance doors, safes or garage doors. Also, the device can be used for security systems.

Now we drill two holes for screws to attach the panel. Also, one or two holes for LEDs (d=3mm). One of them (green light) on the right to indicate that the lock is open. The other one is not used, it can be connected to the power supply for a constant glow or through an additional button to illuminate the keyboard when it is pressed. Accordingly, the LED should be white (ultra bright), fixed so that the light flux is directed towards the buttons. You can cut another piece of the profile and attach it to the keypad on top, or even use a ready-made keyboard from a calculator or other devices. And if you make the front panel from plexiglass, then you will have a solution for illuminating the entire keyboard!

And lastly, the numbers can be applied ready-made, or you can draw them yourself using a felt-tip pen, and then cover them aluminum profile with simple tape. This is done immediately after drilling the holes for the buttons. Of course, there are a lot of wires in relation to devices on microcontrollers, but not everyone has the opportunity to make such devices. The essence of this lock is that even a person who does not have any special skills in radio electronics can assemble it. I bought the parts, assembled it over the weekend, hung it up and connected it. All. This circuit does not require any adjustments. And yet, the code can be changed at any time. All wires from the keyboard are connected inside the combination lock body. Don't forget to label each wire. I used self-adhesive labels for price tags.

I would like to note that over the past time, there are no obvious signs of abrasion on the buttons! Most likely due to the black plastic. They are used daily. But it doesn’t hurt to clean and change the code from time to time.

Device power supply

Schematic diagram of power supply unit RIP

Printed circuit board BP RIP

In the proposed backup power supply (RPS) circuit, a moisture-proof transformer is used, but you can use any other 20-40 Watt, with an output voltage of 15-18 Volts. If there is only one car actuator under load, then a less powerful transformer will do. For several electric locks, the electrolytic capacitor C1 must have a higher capacitance than that indicated in the diagram - for a greater energy reserve when triggered and, accordingly, a smaller voltage drop across the load. Capacitor C2 – 0.1-0.33mF, C3 – 0.1-0.15mF. The radiator for IC1 is larger, about 100-150 cm2, since in a case with a battery, extra heating is not needed! The output load current for L7815CV is 1.5A. Moreover, if a plastic box is used as a housing, do not forget about the ventilation holes. Diode D8 and fuse FS2 serve as short circuit protection.

Security RIPs have a button ( tamper) against unauthorized hacking of the device - we won’t need it. On the board, to connect wires it is better to use soldering instead of terminals, as the most in a reliable way fastenings Also, it is appropriate to play it safe and take the spare power wiring out of the room, in case of an unforeseen event (stuff happens in life).

Video of a homemade lock in action

That's all, I hope you found it useful. ).

Discuss the article HOW TO MAKE AN ELECTRONIC CODE LOCK

After the first steel door was invented, installed on entrance part home, many began to think about how to protect their home from uninvited guests. Locks are structures for protecting premises that have been manufactured for a very long time. Exist different kinds, configurations, operating features and similar differences, however, the essence of the mechanism remains completely unchanged, since the design is designed to block access to the room. Despite the fact that there are many modern technologies, installations such as a combination mechanical lock, the production of which began in the last century, continue to be popular. Initially they were installed on safes, and over time they were used in installing doors in ordinary apartments, garages, porches and private houses.

The design of combination locks is that they do not have a keyhole, due to which they become more reliable, wear-resistant and durable. The likelihood of hacking is significantly reduced. By installing a specific coding of the cylinders and rollers that make up the lock, you can customize the lock yourself, and installation can be carried out on doors made of various materials, for example: metal, plastic and wood. It is advisable that the door thickness be at least 3 cm, which will also complicate the burglary process for intruders.

The diagram for installing a lock on the front door with your own hands is very simple, since for this you need:

• Select a door locking mechanism relative to the width and thickness of the structure;
• Make a marking of the future location of the product;
• Use a drill to drill holes in the door to install the lock body;
• Install the code panel;
• Assemble the locking mechanism;
• Carry out installation and fixation of prefabricated parts of the mechanism;

Finally, you need to set up the code combination and check the functionality of the product.

How to make a combination lock: choosing a variety

To install a push-button door lock You will need to first select its type. They are: overhead and mortise. To install a surface-type lock, simply install it on the surface of the door, and the bar with the bolt located in it on the jamb of the door frame. Installation will not require more than 15 minutes. Installing a mortise combination lock can cause a lot of trouble and this is where special attention and a competent approach are required.

As a rule, each magnetic door lock has instructions from the manufacturer, which must be followed as clearly as possible:

1. A lock template is created, which is done by hand. Some manufacturers include it in the kit, and this greatly simplifies the installation process. Using chalk or a pencil, you need to apply markings to the door leaf. Thus, the location of the structure will be marked on the door on both sides.
2. To make a niche on door leaf To install the lock, you can use a chisel or a special attachment for a drill.
3. Next, holes are drilled to install the bolts.
4. Where the crossbar of the lock structure is located, you need to make a recess, and the dimensions must fully correspond to the front plate.
5. After completing such work, the combination lock is placed in its rightful place and securely bolted.
6. The face plate is being installed.
7. It is necessary to make markings on the door jamb for mounting the locking strip, into which the bolt will be placed. To carry out this process, it is enough to lubricate one of the crossbars with chalk, due to which a mark will be made on the jamb.
8. A recess is made in the jamb for the plank, and you also need to mark the holes to install it. The installation process fully corresponds to the installation of the front strip.
9. Finally, you need to secure the counter or locking part of the lock.

Judging by the steps described above, we can conclude that installing a mortise combination lock is similar to installing other types of locks in the same way.

Combination lock repair

To make repairs on a structure such as a digital combination lock, it will not require too much effort, since basically renovation work consists in recoding the design. In addition, preventive recoding is periodically required to increase the safety of the product.

To change the code on the lock, partial disassembly of the structure is required to gain access to the buttons from the inside, for which you need to unscrew the cover with the buttons.

Next, you need to pay attention to the plates located inside, when pressed, the locking mechanism is activated, and each of them has a specially made cut. Visually separate the working and unused plates. To replace the code, turn the required plates in the opposite direction or, in other words, make other buttons active.

DIY invisibility lock

An electronic invisible lock is additional device, through which you can increase the security of an apartment, house or any other premises. From the outside, the electric lock is completely invisible, but inside it is a reliable installation that can prevent intruders from entering. To make such an electromagnetic lock with your own hands, you can use the most ordinary car door actuator from the central locking, and it is controlled or, in other words, blocked by the most ordinary alarm system.

The essence of such an invisible thing is to block one keyhole bolt in the position when it is pushed forward:

1. Due to the fact that the car anti-theft alarm device has enough wires, and a long type, it is possible to carry out competent and easy installation.
2. It is necessary to select a place for subsequent installation of the actuator, since the pin that will be extended must fit exactly into the bolt when it is extended.
3. Next you need to make precise markings on top bar door frame and it is drilled. Then a mark will be made on the crossbar, along which an additional through hole will be drilled.
4. When the bolt is drilled into the hole, a countersink is made so that the actuator pin fits there as accurately as possible.
5. Using the strip that comes with the kit, you need to secure the actuator to the door frame.
6. Next on door frame a guide from 1 pin is installed, and a limit switch is installed so that it is triggered to open the door.
7. It is mandatory to install the alarm unit, as well as all related elements located in decorative box made of metal. The box is installed on the wall surface next to the door with inside premises.
8. The box closes tightly.
9. An LED indicator or, in other words, an alarm system is connected to the doorbell button.
10. The structure is ready for use.

If a power connection is required, this can be done using a stabilized unit, which has an output voltage of 12 V and a current of at least 1 A. To increase the autonomy of the device relative to the network voltage, you can use a battery from a car to power such a lock, which will be located in pantry or on the balcony.