Selection criteria and technical characteristics of wireless calls

Call, Miscellaneous

In the age of modern technology, more and more new gadgets are appearing to make our lives more comfortable and simplify our work. One such device is the wireless doorbell, which has replaced its outdated counterparts. This simple, compact device can have many functions, and its installation is so simple that it does not require special skills or any special tools.

Wireless doorbell

Recently, such devices have become increasingly popular. So what is the secret of such demand? The answer lies in the way the bell operates.

What is a wireless doorbell

Wireless Doorbell
A wireless doorbell consists of several important components that perform their role. These include:

• Speaker. It produces a sound when guests press the bell.
• Button. A mechanism that needs to be pressed in order for the contacts to close and sound to appear.
• Transmitter. Transmits a signal via radio from a button to a speaker.

The main areas of application of a wireless doorbell:

• Private houses. They are often installed on a gate that is located at a distance from the house.
• Dachas, where the entrance is also remote from the building.
• Apartments.
• Warehouses, offices.

A wireless call becomes an excellent replacement for a wired analogue. It can be used in any place where it is necessary to notify the owner of the arrival of visitors.

Setting up a call

Based on the size of the button and the functionality of the device itself, the location for their installation is selected. There is not a lot of choice here - the button needs to be clearly visible, and if this is an entrance, then it needs to be clear which door it belongs to.

• The wall near the door. This mounting location is used most often - if the button is Velcro, then its fastening depends on whether the wall is painted or whitewashed. In the first case, the surface must be thoroughly degreased, and in the second, it is better to use a screw.
• Door casing or door leaf. Everything is extremely simple - the usual fastening with a self-tapping screw.
• Through the gate of a private house. Here you need to think more not about where and how to screw the button, but how to protect it from direct rays of the sun, rain and other atmospheric phenomena.

Also, in a private house, it is worth considering a bell with two speakers in order to duplicate the bell signal in the workshop, garden and other places where the owners can be often and for a long time.

When installing speakers inside the house, there are two options - if it’s just a bell, then install it as inconspicuously as possible, but taking into account that you may have to turn off or change the melody, which requires relatively free access to it. If you are using a surveillance monitor and an intercom, then you need to make a separate stand for them or use a niche in the wall for this (if there is one).

Advantages and disadvantages

One of the advantages of a wireless device is its ease of installation.
Like any product, a wireless call has its positive and negative features. You need to familiarize yourself with these qualities before buying a device.

Pros of a wireless device:

• No wires. This makes installation easier and eliminates the need to drill into walls to install cables.
• Autonomous power supply.
• Easy to install.
• Ease of use.
• Ease of use.
• Possibility of installation in another location.
• Possibility of use in combination with more complex devices to create a full-fledged security system in the house.
• Stylish design.
• Wide range of products to suit any budget.

The disadvantages include the need to periodically replace the battery
. Cons:

• It is not possible to install a wireless button in all cases.
• There may be interference that interferes with the radio signal.
• The battery needs to be replaced.
• Unreliable fastening of some models with an adhesive base.
• Risk of seizing due to negative external influences.

The best option is to use a wireless button in conjunction with a camera and other security gadgets.

Operating principle

How a Wireless Call Works
Underwater and wireless devices work in a similar way. In the case of wired models, when the button is pressed, the circuit is closed and the signal is transmitted to the speaker through the wire. For wireless products, there is no need to complete the circuit. When you press the button, the transmitter is activated, which sends a signal wirelessly to the call. There are devices with a combined operating principle. For example, a button can be powered by a battery, and the sound source itself can be powered by a stationary outlet.

The speed of signal transmission depends on various factors. These include the distance over which the wireless signal must be transmitted and the presence of obstacles. It is important to remember that concrete and metal structures, as well as other massive obstacles, can reduce the signal strength.

The design of the product is simple. The device has two boards for the button and the receiver. There is also a third circuit for the signal generator, which is characterized by the absence of failures.

How does a call with a button work?

The classic doorbell works like any normally open button without locking. There are 2 wires going to it. Through them the signal goes to the sound card.

If you press the bell button, these wires will close. Voltage will be supplied to the sound card with the speaker. Then a signal will sound indicating that guests have arrived. The sound card is located in the apartment so that residents can hear it clearly.

Doorbell connection diagram

If you release the button, the circuit opens. The voltage will stop flowing to the bell board and the melody will stop. The call is in this quiet state most of the time.

Important! There are models in which the sound is produced not by an electronic board, but by an electromagnet. When voltage is applied to the electromagnet coil, it retracts the core. He hits small metal bars. In such a system, the sound is more natural.

Types of devices

Battery-powered doorbell
A modern wireless remote bell can be classified according to different criteria. According to the type of food there are:

• Separate meals. The button is powered by a battery, and the call is powered by the home network.
• General nutrition. Both elements are battery powered.

By functional purpose:

• Street. Protected from moisture, ultraviolet radiation and other negative environmental factors.
• For home use.

According to the configuration, they are divided by the number of buttons and speakers. There are works 1+1, 2+1, 1+2 or 2+2 respectively.

There is also a division into functional parts. The device can be supplemented with Wi-Fi, a camera, a microphone and other components.

Top 10 best smart doorbells in 2022 according to KP

Eufy Video Doorbell 2K (T82101W1)

Eufy Video Doorbell 2K (T82101W1). Photo: yandex.market.ru

A smart doorbell with a sensor that allows you to study the visitor even in the smallest detail. This is a one-time purchase and there are no monthly fees for additional services. All personal data is stored locally, without spending money on cloud storage. The 4:3 aspect ratio of the lens provides an ideal viewing angle. The charge lasts for six months, if the connection is wired, then the power supply is non-stop.

Characteristics

Advantages and disadvantages

Good image quality. There is a motion detection system. Holds a charge for a long time

Requires HomeBase to operate

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Google Nest Hello

Google Nest Hello. Photo: yandex.market.ru

Beautiful and stylish model. Yes, it's not the most affordable option on the market, but it has great specs and a lot of features available. Thus, users can easily block sound at night - why scare someone if you are not expecting anyone. If you still wonder who came at a late hour, a night vision system is available. The picture quality reaches HDR levels, the view is available at 160 degrees.

Characteristics

Advantages and disadvantages

The model has a stylish design. There are many useful functions here: blocking sound at night, night vision, face recognition and others

This model is not the easiest to install, you may need the help of an electrician

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REXANT GS-215

REXANT GS-215. Photo: yandex.market.ru

An interesting option that is not the most expensive. It is equipped with a motion sensor with a response radius of 110 degrees. The device can turn on either automatically when someone approaches the door, or work by simply pressing a button. The distance covered by the device during operation is 10 meters. The sensor's sensing distance can also be adjusted. The bell is self-powered - AAA batteries last for 6 months. The alarm sound can be selected from 12 available melodies.

Characteristics

Advantages and disadvantages

The model has a low price. Works without failures, the battery holds a charge for a long time, as stated by the manufacturer

The kit does not include adhesive mounts

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Xiaomi Xiaobai Smart Video Doorbell D1

Xiaomi Xiaobai Smart Video Doorbell D1. Photo: yandex.market.ru

An affordable and interesting option. According to the manufacturer, this is an excellent replacement for standard doorbells. The device will increase the level of security and protect children from opening the door to strangers. The owner of such a device can completely control everything that happens near his home. It is important that you do not have to change the battery often. The call is equipped with a rechargeable lithium battery with a capacity of 5200 mAh.

Characteristics

Advantages and disadvantages

For additional safety, the SafeSound function is provided, with its help you can easily change the timbre of your voice. There is a memory for faces

The instructions are unclear, you need to understand it further

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NSH-DB-01-WiFi

NSH-DB-01-WiFi. Photo: yandex.market.ru

With this smart call you will be able to see the visitor on the screen of your smartphone. The device has a built-in microphone and speaker. You can communicate with guests at any time - even if you are not at home. The video of the visitor is not lost; it is saved to a microSD card, to the cloud, or directly to a smartphone. Built-in sensors allow you to record video or take photos even in automatic mode when motion is detected in the control area. Night mode and image sharing are available.

Characteristics

Advantages and disadvantages

Automatically shoot photos and videos and then save them. Night vision and sharing system

Not the lowest price on the market. The battery lasts three months - competitors have stronger batteries

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Smartron T195-W IP44

Smartron T195-W IP44. Photo: yandex.market.ru

An interesting and inexpensive option. It features a stylish modern design. It is simple, but at the same time elegant. The call is waterproof, which means you don't have to worry about rainy weather. The model is equipped with a dustproof remote button. Large operating range - up to 200 m in open areas allows you to hear the doorbell and open the door in time. You can choose one of 45 melodies for calling.

Characteristics

Advantages and disadvantages

Affordable price. There is a thermometer that allows you to find out the temperature outside

Compared to more modern and expensive models, the functionality here is modest.

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Ezviz DB2C

Ezviz DB2C. Photo: yandex.market.ru

The kit includes not only a smart wireless video doorbell, but also an additional sound module. The visitor can be heard from anywhere. With a 236W FHD lens, the DB2C Video Doorbell delivers 1080p pictures and captures a large area with a 160-degree wide angle. It has a night vision feature that makes protecting your home even more reliable. The built-in microphone and speaker in the video doorbell allows you to instantly talk to the person standing at your doorstep through the EZVIZ app, without being distracted from your daily activities.

Characteristics

Advantages and disadvantages

The multifunctional model can save images, has a passive infrared motion sensor, and a sound module that notifies the owners not only by phone, but also in the apartment. The device is also of good quality

Not the most affordable option on the market. Also, in places where the device will be subject to mechanical stress, it is better to choose an option with an anti-vandal system

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Darho D1

Darho D1. Photo: yandex.market.ru

This call can be an excellent solution for a home, apartment or office. It reacts to movements and is triggered within a radius of four meters from a person. Both a pleasant melody and a scaring alarm can be triggered. You can leave a pre-prepared voice message. Installation of this bell is simple; all necessary holders are included in the kit.

Characteristics

Advantages and disadvantages

Not the highest price on the market. Easy to install

Low number of modern features

Lemon Tree "2 in 1"

Lemon Tree "2 in 1". Photo: yandex.market.ru

It is not only a waterproof wireless Wi-Fi camera, but also an excellent doorbell that has night vision function. Day and night modes are switched automatically, and passive infrared human detection is supported. The picture is automatically recorded. From the mobile application you can see everything that happens near your home. The manufacturer also assures that the device features low power consumption technology.

Characteristics

Advantages and disadvantages

Good camera performance. Availability of useful functions

There are no instructions in Russian, users complain about the lack of batteries included

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"Vibro" Zamel ST-229/N

"Vibro" Zamel ST-229/N. Photo: yandex.market.ru

This bell can be used not only as a device notifying the arrival of guests, but also as a device for internal signaling communication. The Vibro call has many advantages. Among these are duplication of the sound signal with light indication and vibration of the receiving device. The maximum range of a radio call signal is 100 meters. The sound can be turned off so as not to disturb those who live next to you.

Characteristics

Advantages and disadvantages

Easy to manage. The sound can be adjusted at your discretion

Few functions

Current product

Fire protection is the main task of the homeowner

Specifications

Electric bell with two buttons
When purchasing a device, you must pay attention to the basic technical parameters. Basic characteristics include:

• the frequency at which the device operates;
• radius of action;
• signal type;
• number of buttons and receivers;
• power;
• way of eating;
• presence or note backlight;
• ability to set a ringtone;
• sound adjustment;
• Possibility of use for intercoms or video eyes;
• sending SMS messages to the owner;
• night light, motion sensor;
• operating temperatures;
• protection from aggressive influences.

A standard electronic bell operates in the frequency range from 433 to 434 MHz, but there are products at 315 MHz. When choosing a device based on range, you need to take into account the ability to avoid obstacles. Concrete walls and armored doors reduce the range, and drywall and wood transmit electromagnetic waves well.

Distance

Typically, the distance between the button and the receiver can be from 50 to 100 meters, but many different features can affect the range of the signal and its quality. One of them, directly, are walls and doors. If there are a lot of walls or even metal doors on the way to the receiver, this can affect it quite strongly, even to the point of losing connection with the button itself. To do this, you should evaluate the room and choose the most suitable place for the receiver, where nothing could interfere with the signal. It would be a good idea to double-check the range stated in the specifications.

Accessories for expanding functionality

Intercom with monitor
To create a reliable security system, you should add other protective equipment to the call. You can buy a set at once or assemble the entire system yourself from scratch.

Additional details include:

• Video-eye. This is a device that operates on an ongoing basis or after a motion sensor reacts. The picture is transferred to a monitor or computer.
• Motion Sensor. The device reacts when someone appears near the door. It can notify the hosts about the arrival of guests even before they press the button. It can also launch a video peephole or video recording.
• Intercom. The assembled system is more complex and consists of cameras, a monitor, speakers, and a microphone. Some devices can send SMS to the owner, have backlighting and volume control.
• Additional cameras. They allow the apartment owner to track who came to visit and make a decision about opening the door. The quality of image transmission on the screen and viewing angle directly depend on the video camera itself.

When choosing the best circuit, you need to take into account that additional parts, especially those working around the clock, need more stable power. Options are possible, for example, activating the camera at the press of a button, circuits with a motion sensor. Additional options increase the cost of the entire system.

Parts used

Transistor T1 - mp25-26, T2 - kt605 or p307-309, but p605 works better, diodes D1-D4 - D226, but others are possible, although D226 gave better results. Capacitors C1-0.1 C2-0.05, trimming resistor - 47k, C3 - 100 microfarads per 100 volts. The telephone capsule was used as an emitter, but only very old ones (large diameter).

The use of a Czech capsule with a resistance of 50 ohms gave very good results, but it has one feature - to achieve good volume, you need to remove the plastic plug from the side of the contact screws, under which there is an adjustment screw and, having turned on the device, use a small screwdriver to make adjustments, unscrewing and tightening screw to achieve maximum sound volume.

Warning! If you are going to use this device as a doorbell, do not set it up by connecting it to a 220 volt network! You may be exposed to high voltage! Set it up by connecting 12 volts to DC, and then connect the mains voltage.

After the doorbell gave up its life, I dug up an old telephone on the mezzanine, tore out this electronic bell from it, packed it in a box of cotton swabs, and now it continued its service above the door. The author of the project is Wolf9405 .

Discuss the article DOORBELL FOR BEGINNERS

A high-quality wireless bell for the front door of an apartment or house is in no way inferior to its wired counterpart, and even surpasses it in ease of installation and dismantling. The signal transmission unit can be so miniature that outwardly wireless call models are no different from regular ones. They are equipped with a video peephole combined with a motion sensor, backlight, anti-vandal cover and other little things to increase the comfort of use.

The difference between home devices and street devices

Models intended for outdoor use must be equipped with a waterproof housing.
Before buying a wireless bell, you need to decide in advance where it will be installed. There are two basic options - external and internal installation. In case of installation in the house, it is enough to buy an inexpensive simple model with Velcro fastening. Such devices do not require anti-vandal protection or moisture resistance. If the device will work outdoors, you need to take the selection seriously. You should pay attention to the following indicators:

• Temperature Range. The bell will work in winter and summer, so it must withstand positive and negative temperatures.
• The presence of a moisture-proof case. External environmental influences can cause serious damage to the device, so it must be reliably protected.
• UV protection. Ultraviolet radiation can also harm the operation of the bell, so you should choose products with a reliable protective case.
• Fastening. The bell must be securely fixed to the surface so that it does not fall off. Anti-vandal protection will be required.

Outdoor products have more requirements for safety and operation, so their cost will be higher.

Important aspects

Typically, the button for wireless calls is a small transmitter, powered by a battery, and is completely autonomous. But since there are different types of doorbells in this category on the market, it is important to carefully weigh all the options against your intended needs before making a purchase. Some of the main factors in your selection may be:

• The system you purchase must come with portable receivers. This will allow you to position it most correctly, at the point where the call will be clearly audible throughout the room.
• Its covered range is also equally important, since the best signal penetration should be ensured. Keep in mind that thick interior walls, as well as bricks and metal, have the ability to degrade signal quality.
• Since the button will be placed outdoors, it is important to check and confirm that it is designed to adapt to outdoor conditions. They must be resistant to rain and heat. These are serious considerations as they increase the longevity of the wireless call.
• Different models may offer a specific set of tunes, and for this reason it is believed that it is important to choose one that will appeal to all family members. It also makes sense because certain sounds and melodies are known to irritate people. Make sure the sound you choose does not have this effect. Also keep in mind that it must also be loud enough.

• In order to get all the benefits of a wireless call, it is also recommended to pay attention to models with the highest autonomy. There are different types of batteries depending on the type you purchase, and the best choice in this case would be those with standard batteries. Largely because they are known to last longer and do not require constant replacement. In addition, consider that there are also models that issue various types of alerts when the battery charge is at a critical level.
• There are some models that also come with several bell buttons, which can be extremely useful, especially if your home has several entrances.
• If you need audio communication or camera support, then you should select those models that have this functionality. This, in turn, will allow you to know who is at the door without having to open it.

Once you take all these factors into account and determine your needs, you can easily find the model that will perfectly suit your individual needs.

Features of choice

If you purchase an expensive model, you must require that all warranty documents be filled out.
In addition to the technical characteristics of the device, other parameters must be taken into account.

• Appearance. A wireless outdoor bell should match the interior.
• Number of batteries. Complex systems may require more power supplies.
• Protective housing. Considered for street models.
• Melody. In some types of wireless calls you can set your own ringtones.
• Signal strength.
• Equipment.
• Mounting method.
• Cost, manufacturer.
• Guarantee period.

Taking into account all the listed criteria, as well as technical characteristics, you can choose the best device for your home or apartment.

Best models

Wireless call F-108U-E Feron
The rating of products with the best characteristics includes calls of different price categories from well-known manufacturers. Polish devices from the Zamel company have proven themselves well. They are inexpensive, of good quality and can be used both indoors and outdoors. The range is varied, you can find a device for any interior.

Feron brand calls became popular in 2004 due to their low price and high quality. The line includes waterproof models with a range of 100 meters (Feron e-348-2). The user has 32 melodies to choose from. Operating temperatures from -15°C to +55°C.

MiG apartment doorbells are produced by a Russian company. The range is constantly expanding and covers all market niches. The popular QH 230 model provides a range of up to 80 meters and has two buttons. There are 24 ringtones in memory. The bell itself is connected to the power supply, the button is powered by an AA battery.