How does samsung wireless charging work? Wireless charging How does it work? Principle of operation.

Many users want to know what wireless charger for phone and how easy it is possible normal phone Redo in wireless. The basis of the device is the induction current. In order for the system to work, an induction coil and a receiver coil is required in the cell phone itself or another device. The first is included in the power grid, the second when closely finds it creates a specific field, as a result of the impact of which the battery is charging. This method is based on the laws of physics. There are several standards, but they work in the same principle, the difference only in the frequency of the hertz, on which the device is valid.

Features of work

When the receiver falls into the reel area, the special device catches it. A signal is transmitted, the charger is turned on, that is, the field will not be created constantly, but only at two conditions - the coil is powered by the network, the receiver is close to it. The signal itself can be served and a mobile device, for this it will use NFC after the contactless charger for the phone will turn out to be within the radius of action.

Wireless device for smartphone (transmitters (transmitters)

The radius of the magnetic field created by the coil is usually small, it is only up to 10 mm, and the voltage is 5 watts, which is standard for this kind of devices. It is enough for charge, but it is not capable of harming the surrounding living beings. When interacting with the charger, the receiver coil is activated, which sends the resulting energy into the rectifier through which it is already transmitted directly to the battery of the charging phone. Roughly speaking, the principle of working wireless charging is to transform electric current In the magnetic field and vice versa, but in another place.

What is a wireless charging function?

Modern mobile phones can have an already built-in coil, for example, to this family refers Nokia Lumia.Other models get a special cover to connect a wireless charger. There is such an option about 1,500 rubles. You can find a Chinese analogue, it will cost much cheaper if you buy chargers without a wired system can be used in any room or car, where the manufacturer has provided such functions and installed in the auto the desired coil.

Many manufacturers produce special accessories, for example, music automotive or home systems can be equipped with a platform for the charge of mobile devices. There is also a car wireless charging. Such adapters can be installed in any car, and they will work from a cigarette lighter or a special outlet, if such in the car is provided.

Wireless Charger Standards

There are several standards of wireless charger, which we now consider:

• Standard Qi: Wireless charging of this type is the most common device. The protocol has developed WPC, this format is used by many well-known cell phone manufacturers, such as Nokia, Samsung, LG and others. The frequency of such devices is 100-205 kHz, which allows to achieve an efficiency of at least 75-80%.
• PMA is the second standard used for wireless charging.
  The developer is Powermat. The device will work with a frequency of 277-357 kHz. Charging will be faster, such a standard is more popular in America.
• Rezency (A4WP) - the operation of the devices of such a plan is based on mutual magnetic resonance. Thanks to this technology, the power of the device can reach up to 50 W, thanks to which the universal wireless charging, it is not only suitable for mobile phones, but also larger devices, moreover, it allows you to have a gadget further from the coil.

Is it safe?

Many users are worried about whether the coil harms the human health, the manufacturers claim that there is no influence on the human body does not have such a charger, even if it is in close proximity to it. It is worth noting that the electrical shield works on the same principle, is in close proximity to the inhabitants of any apartment or at home, while it does not harm. Most wireless charging devices have a power not exceeding 5 watts, which is too little in order to affect even very sensitive equipment.

Advantages and disadvantages of technology

The main advantages that have wireless chargers for smartphones are the lack of wires, in addition, it is universal for any phone model. Such technology allows you to save the nest of mobile phones, they will not be divided from frequent use. It will not be necessary to worry about buying wired charger, which constantly break.

You can use such a device wherever there are sockets, many modern cars from the factory have players for charging phones. The Ikea store already sell desktop lamps with built-in induction charging unit. Many companies, such as Samsung and Nokia, have long produced such devices and adapted to them phones with wireless charging. The charger itself has a long service life, it works much longer than usual. However, there are some shortcomings to which the following can be attributed:

• The efficiency cannot exceed 80%, part of the energy is lost, so charging occurs for quite a long time.
• The size of the device is quite large.
• You can not use the phone while it is charging.
• Small heating.

How to make a wireless charging on a smartphone

Since such charging technology is rather new, only those phones that are adapted to it can work with it have a special coil and rectifier. Many companies supply their new models as such, but what should I do if you don't have a new phone, but do you want to charge it remotely? To do this can be converted mobile phone With your own hands, the wireless charging scheme is relatively simple and will require only buying inexpensive Chinese modules.

Cover on the phone for wireless charging

The popularity of this type of charger is growing, so most of the well-known companies have established their release. Each model has certain features, satisfies certain customer requirements, well suits certain models of smartphones for which they are calculated. If you take a brand charging, then her brand Ideally should coincide with the brand of your smartphone, so the probability that the equipment will work properly, much higher. For example, Apple products often conflict with Chinese crafts and requires connection to the original. The following firms include the most popular manufacturers:

• Samsung is one of the most common brands that has established the production of wireless charging devices for a long time, so it took a solid position on the market. You can meet this company in almost any store where mobile devices or accessories for them are sold.
• LG releases both mobile devices and memory to them, you can buy a receiver and attach it to the old phone model.
• Nokia launches well-known high quality products, wireless charging devices are offered to the Lumia line, which are suitable for almost all models of smartphones of this family. You can meet the products in any salon cellular communication.
• Apple applies this type of charger yet only to the clock Apple Watch.. The device itself is attached to the clock, so it is very convenient to use it, for the phones until 2017 there was no such analogue, so their owners often resorted to independent conversion of devices. Last year iPhone 8 and iPhone X are already equipped with such technology, so in some stores you can buy separately and the charging devices themselves.

In addition to famous brands, it is produced enough a large number of Chinese chargers, often they do not have famous nameBut meet international standards adopted for these purposes, there are also fairly cheap options.

Prices for every taste and color, but pay attention to the parameters of the devices

However, buying products, for example, on Aliexpress, you need to pay attention to the seller's rating, besides, look closely to the brand itself, well, if it is at least a little known or someone before you bought the device and left a positive feedback. As a rule, Russian consumers buy models supporting standard Wireless ChargingQISince it is the most popular on the territory of our country, and they use most of the manufacturers of smartphones and other portable devices.

When choosing a memory, you need to pay attention to the number of hertz, from which they work, as well as watts. Some models of phones, especially old enough, can be sensitive to electromagnetic fields, which is why the use of contactless memory is not recommended. The phone may fail. For example, Samsung Chargers differ high quality, Therefore, as a rule, safe for any phones, the manufacturer makes them only in accordance with the quality standards, uses only branded spare parts.

One of the most popular charging produced in Korea is Wireless Charging Pad. It belongs to the basic family of such devices, which is almost completely devoid of disadvantages that have had an earlier generation of similar charging. This model is also convenient because it does not need to some kind of placing the phone on its platform, its position does not play any role. It is quite convenient, no need to follow, as lies mobile devicewhether it was shifted.

This type of device is provided for a popular smartphone. Samsung Galaxy S6, it works in the WPC standard. TO positive sides This charging refers to the fact that it can be applied not only in relation to the Galaxy family, but also other model lines of the company. A distinctive feature of this development is and its ability to quickly charge the battery, for example, to increase the charge up to 50% in a very short time, faster than with a wired method, it is relevant if the communication means you need urgently, and the battery has a village. It is possible to use such a memory when the phone's socket for a regular block is broken, or you do not want to be unnecessary wires.

If you compare Samsung's products for properties with Apple, it is worth noting that most of the devices of this company such a way of charging do not support, with the exception of several phone models and one clock model. In addition, Apple charger will not contact with smartphones of another brand.

Output: Wireless Charger for cell phone It is quite convenient to use, it is used in cars, however, it may also have some disadvantages, in particular it is not suitable for use in old models of phones, and they need to be upgraded.

But if everything can be ordered in China, it is quite possible to make up to 500 rubles. And if it turns out also to save, so setting one time the transformation in the browser can be saved on purchases up to 8%.

Video: 📦 Charging without wires - Install the wireless charging module into the smartphone

Video: Wireless charging for any phone for $ 5.

Video: Wireless charging. What are there, how to pro-paint, why heats up and does not charge

Nowadays, a person without a smartphone is a man, torn away from life. It is difficult to imagine that a few years ago a mobile phone was used only for communication. Now this little assistant gives us both access to the Internet and a variety of applications, and wakes us in the morning. The list of products provided by a smartphone can continue infinitely. It is not surprising that for modern phones invented a large number of gadgets. One of them is a wireless charger, which we would like to talk in more detail.

How to determine whether the phone supports wireless charging?

It is clear from the name that it is a gadget that allows you to charge a smartphone without the use of wires. It is a small stand connected to the network. Inside there is an induction coil, which creates a small magnetic field around itself. If a smartphone will be located within the radius of this field, then it will receive electricity in the literal sense of the word by air. But there is one nuance - an induction coil should also be built in the smartphone. It will serve a kind of energy receiver from the charger.

The purpose of creating this device was to get rid modern smartphones From the charge connector, and also allow all devices in the house to charge from one platform. The idea was successful, but why then we do not see this technology in every home and do not use it yourself? The answer is simple - despite all the advantages, this miracle device has a cons.

Pros and Cons Wireless Charger

Pluses the wireless charging is enough, but they all have their own cornerstone.

No wires

Without a doubt, this is a big plus. Wires have always been a weak place in charging. With frequent beggars, the wire is easily damaged and confused. Frequent recharging loosened a USB port in the phone, and sooner or later repairs required. But there is also the reverse side of the medal. Refusal of wires reduced the efficiency (efficiency) from 90% to 60-75%. Simply put, when using wireless charging, your smartphone will be charged longer than about 2-3 times.

Land of use

It would seem that there are no wires - there are no restrictions, and you can charge the phone just being in the apartment. But no - the radius of using a wireless charger is very modest (3-5 cm) and the phone will have to put on the stand. Another significant disadvantage will be the impossibility of using a smartphone during charging.

Price

The cost of the charger is quite variable, but it will always be more expensive than the charging us.

Standards

I would like to tell about the standards, thanks to which the use of electricity transmission technology by air was possible.

QI ("Qi", in honor of the term Eastern Philosophy) developed by WPC (Wireless Power Consortium - Consortium Wireless electromagnetic energy). It is the most common and maintained by such giants of the mobile industry as Asus, Motorola, HTC, Huawei, LG, Nokia, Samsung, Blackberry, Sony and others. You can read more details with the standard and list of supported devices on their official website.

The PMA standard also uses the principle of electromagnetic induction, but cannot boast such a big list of manufacturers supporting their technology, like Qi. It was developed by Powermat, which at the moment is trying to fight with unhealthy competition from Qi.

This standard uses Rezency technology, which is radically different from PMA and QI. It is strange that the most unpopular standard has many advantages, in comparison with their competitors. The advantages include:

• the possibility of charging through the interference (if you put the book between the smartphone and the charger, nothing will change);
• one platform can provide energy to several devices;
• work in close proximity to metal objects, etc.

Acquainted with full list Smartphones that can use wireless charging directly from the box, on the official website https://www.wirelesspowerconsortium.com. I would like to note that most of the manufacturers make sure that their product supports the use of this technology.

How to be if your smartphone is not in the list of supported devices, and you need to use the wireless charging? If you have had such a question, then, most likely, you are a happy Apple product user. While the iPhone does not provide for the possibility of receiving electromagnetic signals. However, there is an alternative - the acquisition of auxiliary accessory, which will do it for your phone. It is placed under a standard case and does not cause any discomfort.

Is wireless health charging

Like any new technology, the wireless charger causes many questions. One of the most sharp - does it make harm to health. Immediately dispel this controversy myth. It will cause you no more harm than an electronic razor working on the same technology. The developers of the WPC standard themselves also argue.

The contactless charger is a dream for each smartphone owner. Modern phones Regularly need charging. Constantly have to connect them using the wire to the adapter. However, now you can choose a wireless charging and forget about all the difficulties. Wireless charging for the phone is no longer a dream, but a normal device that makes millions of users.

For many decades, people dream of the possibility of transferring energy to the distance. This can often be found in the fantastic novels of the 20th century. And so happened. In use, chargers appeared, which charge consumers accumulators at a distance. True, the distance is still very small, just a few centimeters, but this is a confident step forward. And not theoretical, but practical.
At the moment, wireless non-contact chargers for smartphones (BZU) have been widely distributed. It is enough to put a smartphone on the charger and it will start charging. No wires from wireless charging to the smartphone are not necessary. Everything works on the law of mutual induction. Sounded the phone, you calmly take it in my hands without fearing to get confused in the wires, without fearing to damage the contacts of the connector, as well as it is not attached strictly to the workplace.
So that in currently Wireless charger is no longer a myth. These are adapters that can acquire anyone. You can position the charge on the bed at the bed at home or in the car on the dashboard.
But it is worth noting that not all the phones and smartphones manufactured by various manufacturers are able to charge from wireless charging. Phones supporting wireless charging began to appear quite recently. And which phones support wireless charging can be found at the cellular salon manager. But if your phone does not support this feature, then how to upgrade your phone or smartphone for charging data, I will describe below.

Principle of operation

In the principle of operation of the wireless charger, laws, open by scientists of the Tesla and Faraday, are laid. These are the so-called induction and mutual induction phenomena. Remember school physics. If the conductor flows the current, then a magnetic field occurs around the conductor. If you add another conductor into the magnetic field, then it is induced by EMF (electromotive force).

All transformers work in this principle. If on the primary winding of the transformer alternating currentThe secondary winding is formed a current, the value of which will depend on the number of turns in the secondary winding. In the same principle, a wireless charging is working. And I will try to explain how the wireless charging for the phone works. The source of electromagnetic radiation becomes an induction coil, which is in the charger (performs the role of the primary winding of the transformer). Looks like a stand, charging glass or something similar. Connects to the power grid directly or through the adapter. The charging device also has its own coil (similar to the secondary winding of the transformer). If both coils are located on a fairly close distance from each other, an alternating current is induced in the second coil, then it is straightened to a permanent and charge controller charges the gadget battery.

Any contactless charging for a phone or other device works on this principle, whether in a house or car. Most often we meet the Qi standard device.

Wireless Charger Standards

QI
The most common standard wireless charging is Qi. This standard was developed by a wireless electromagnetic energy consortium (Wireless Power Consortium, abbreviated WPC), and is supported by many manufacturers like Samsung, Nokia, LG and others. The QI standard is read as Qi, which in Chinese is consonant in translation with the word "life".

The principle of operation is based on the law of mutually induction, as described above. Frequency of operation BZU 100-205 kHz. KPD 75-80%.
PMA
Another popular standard is called PMA. The law of electromagnetic induction is also laid in its principle, this standard was developed by Powermat in 2012. It is not as popular as Qi, but it also has its advantages.

The main efforts of the company sent to the development of a better transmitter of the electromagnetic field. Yes, and the frequency of the charger is 277-357 kHz.
Mostly this standard is common in the United States. But still the PMA standard is quite losing Qi.
Rezency (A4WP)
The principle of work of the REZENCE standard is based on the law of magnetic resonance. This allows you to increase the transmitted power up to 50 W, which is enough to charge more powerful devices, and even several devices simultaneously. And you can also increase the distance from charging to the charged gadget.

But while this standard is more theoretical and does not receive wide support.

Where apply wireless charging

Since the invention of wireless charging, it immediately began to embed all sorts of manufacturers to charge batteries of various devices.
One of the first wireless charging was introduced to the manufacturers of toothbrushes. The fact is that the toothbrushes have direct contact with water. There was just the invention of the BZU. After all, these devices do not have bare contacts. Toothbrush And the charger has good sealing.

Apple also does not lag behind progress. They implemented wireless charging for their clock Apple Watch.

But the most popular Wireless charging for smartphones was obtained. What is the convenience. Just put your smartphone on the charger and the charging process went. No wires. A large share of smartphones with such charging released samsung. Nokia The same released smartphones with such charging. In 2017, Apple released smartphone iphone. 8 iPhone X, which can also be charged from BZU.
Often, such devices are installed in public places. In cafes and restaurants, people are used to working with smartphones, communicate or entertain. The Internet takes out a lot of battery energy.

To attract visitors and that guests satisfied as long as possible in these establishments, the owners offer free Wi-Fi, but also, of course, contactless charging for smartphones that are mounted right in the tables of the institution.

Also many manufacturers produced wireless car charging for the phone. The principle of wireless charging is very simple. The wire from this charging is inserted into the cigarette lighter socket, the charging itself is installed at a convenient place, taking into account that the phone will not fall from it while driving.

Advantages of wireless charging

There is a lot of advantages in the phone that the phone can be charged proactically. First of all, the main problem is solved, namely adapters. Now there will be one universal panel immediately for all devices. Wires will not wear out and nests on a mobile phone will not break too quickly. For a charging iPhone, it is also especially important, because its repair is expensive.
When you choose a specific adapter, you can not think about the advantages of contactless:

• Convenience. You can use anywhere.
• Admissible charging multiple phones immediately.
• Over the time of devices that support this feature becomes more and more.
• Electricity spend a minimum, although the efficiency of this charging is about 80%.
• Samsung and some other companies plan directly with the phone to offer such an adapter.
• Durability. Charging is able to serve for many years.

Manufacturers

Many companies engaged in issues of creating and developing contactless charging for phones. Each of them is focused on certain features and is ready to satisfy specific wishes of users. First of all, you must consider charging from the manufacturers of smartphones in which the Wireless Charging function is enabled.

How do you improve your smartphone

As I wrote above, not all smartphones can work with non-contact charging. There is no reception desk inside these smartphones. But this is not a sentence. To date, on the market, except for wireless chargers, there are also separate receiving devices.

They look like a cardboard leaf size with matchboxes. Inside this plate placed a receiving coil. The reception area is two types. The first option is the receiving part is placed under the lid of the battery compartment of the smartphone and connects directly to the battery.

The second option is the receiving part connects to the input connector and is covered with a smartphone cover.

Yes, there is another option. A smartphone covers with a built-in reception area are produced.

How to choose

Specialists advise before deciding which non-contact charging for the phone to choose, decide whether the gadget supports this technology. Apple company Specially categorically against this practice, because they are focused on using original contactless adapters. However, Samsung and many other manufacturers do not need so careful selection. Many gadgets allow a modern phone charger different manufacturers.

Review of wireless charger video must see

Wireless charging is really a cool and comfortable thing. "Threw" his Samsung Galaxy S8 on a special stand and he charges. You do not need to look for the wire, insert it into the connector, then pull out if it suddenly needed to answer the call or move for a few minutes ... in a word - cool. But, not cool when this charging stops working. Today we will tell you that it can prevent you from chargeing Galaxy S8 without wires and how it can be fixed. Go!

SAMSUNG GALAXY S8 supports the following wireless charging standards - WPC and PMA. Be sure to consider this when buying accessories for your gadget.

But even if you bought the right accessory, it's not always that everything can work "as it should" - try to figure it out how to fix it:

• Simple "glitches" in the system is sometimes enough just to restart the device.
• If the Galaxy S8 stops charging after some time after you put it on a wireless charger, you need to enable the screen saver in the "settings". Strange but it is so some sAMSUNG smartphones Completely refuse to receive energy through the air without a constantly activated display screensaver during this process.
• It may well be that some malicious or simply "curved" application. Loading B. safe mode () And check whether the charge is charged.
• Covers. Especially some shockproof. The radius of the wireless charger is not very large and additional protection can affect both the energy rate of the battery and the process itself until its fullest impossibility.
• Cable. Although all this action is called wireless, the accessory is still connected to the accessory. And if the connection is carried out using a long wire, you should try and replace it to shorter. According to some users, it really helps.

If all previous methods did not help, and you are 100% sure that this wireless charging:

• Fully proper.
• 100% compatible with Galaxy S8.

Then to exclude "iron problems" with a smartphone, it is worth making him full reset to factory settings (). After that, you will know exactly what is faulty and why the charging is not going through the air.

And of course, use only original (high-quality) accessories. After all, it is not even that "neorigalables" do not always work correctly (and indeed, they simply do not always work :)), but in the fact that such "non-certified" wireless charging can easily "kill" the battery. And changing the battery in Galaxy S8 is not very great pleasure.

To date, we are already hard to present your life without mobile gadgets. This led to the fact that a huge number of wires accumulate near home sockets, among which it happens not so easy to find the necessary "charging". In this case, the problem will help solve a wireless charger. The principle of his work is very simple - just put the gadget on a special panel so that it charges. The accessory is based on the principle of operation of the induction coil. This technology is called Qi. It becomes very popular lately. In 2015, the worldwide popular brand began selling furniture in which the Wireless Charging Module will be built. Today, all flagship models of smartphones support Qi. It is expected that soon transmitters or, in other words, modules can be found at airports, restaurants, cinemas, fast powders, shopping centers, which will allow charging phones and tablets at any time. In fact, it will facilitate the life of users of mobile gadgets. We enter a new era, where it is not necessary to carry with you everywhere for all the devices we use.

Wireless charger for gadgets with QI technology support

The wireless power standard is called Qi. In Russian, the word is pronounced as "qi". This name is standard in honor of the term Eastern Philosophy. It is designed by a WPC wireless electromagnetic energy consortium. This organization combines world electronics manufacturers and sets an important task - to standardize the process of charging gadgets by the induction method.

In the near future, all devices can be charged without connecting to the network. It is incredibly convenient. Each of us at least once came across the situation when. It is urgent to look for a way out. Soon, wireless charging modules will appear in all public places, as well as at home for each user. At home, you can simply place the module in a convenient location, and it will never lose, unlike the wired "charging". It is enough just to put a gadget on it and wait a bit, while the battery capacity is replenished.

The principle of operation of the wireless "charging" is based on the properties of the induction coil to transmit an electric current. In the school course of physics, we were taught that when connecting an induction coil to a power source in it, perpendicular to the coil to turns, a magnetic field occurs. Thus, if you arrange two coils in the radius of the magnetic field, and at the same time connect one of them to the power source, the voltage will appear in the second coil. At the same time, it is important to take into account the fact that two induction coils in no way should come into contact with each other. Such a simple principle is included in the work of wireless charger supporting Qi technology.

There are two varieties of QI standard. The first implies charging at low power - 5 watts, and the second - at high power - 120 watts. Qi high power is now not produced by manufacturers due to objective factors. Using QI for 120 watts, you can charge the laptop. Qi on 5 watts is used to replenish the capacitance and telephones. It should be noted that various current for the tablet and smartphone is necessary. The wireless charger for the phone creates a current strength in 1 amp, and for tablet computer - 2 amps. When choosing an accessory, be sure to pay attention to such characteristics.

Energy Efficiency of the QI standard

The modern wireless charger consists of two components. One of them is built directly in the gadget that supports QI and is called a wireless charging receiver. In fact, it is a receiver that conducts electric current to the battery. The second component is called a transmitter. If the purchase of a wireless "charging" is implied, it's about transmitter. They are of various shapes and sizes. Mainly distributed round and rectangular transmitters.

To better understand how a wireless charging is working, it should be noted that the magnetic field is able to transmit not only the electric current, but also data on bytes and bits that the developers of the Qi standard took into account. The interaction between the coils will occur only at the moment when the gadget with the built-in transmitter will be near the transmitter.

If the accessory for charging the gadget will function in the background, the pulse sent every 0.4 seconds by the transmitter will not change the voltage in the coil embedded in the transmitter. It can be concluded that the modern accessory knows how to recognize, in what mode function. As soon as the smartphone will be near the distance of several centimeters, the voltage in the induction coil will sharply decrease, and the device will switch to the active work mode. As soon as the smartphone battery is charged, the corresponding signal will translate the charger in background mode. It can be concluded that modern wireless accessories for replenishing the battery capacity are energy efficient.

Is the Qi technology safe?

Some users mistakenly believe that the QI wireless charging function can harm health. The fact is that magnetic radiation is not ionizing. In its influence on the body it looks like a signal mobile communications, Radio signal. In this case mobile networkwhich comes from the tower is stronger and has a continuous character, while the electromagnetic radiation disappears immediately after charging the smartphone battery.

The power of wireless charger is 5 watts. It is not enough to have an impact on the human body. We can only talk about negative impacts when the power of such devices will be 120 watts. But such models are not produced on an industrial scale. This explains the absence of wireless chargers for laptops. It is important to know that the battery wireless charge technology has long been used in many models of electric rates and electric dental brushes, which once again proves its safety.

What smartphones support the function of a wireless charging?

First of all, we want to note that not all gadgets today support the function of a wireless charge. Apple intentionally supplies products to the market, which is incompatible with Qi. In this case, we recommend purchasing a special case with a built-in induction coil.

Flagship devices mainly always support Qi technology. These include such popular smartphones models like SAMSUNG GALAXY S6, Sony Xperia. Z4V, Samsung Galaxy S6 Active, Google Nexus 6, Motorola Droid Turbo, Nokia Lumia 930, Samsung Galaxy S6 EDGE. Already, dozens of models of various manufacturers can be charged using a wireless accessory, which ensures maximum use of use for users.

Is it possible to make a wireless charging personally?

Wireless chargers have a sufficiently high cost, given that they are a conventional induction coil. The question arises: "How to make a module with your own hands?". In principle, if you have knowledge of the foundations of physics and special equipment for measuring the strength and power of the electric current, it will not be a big problem. Radioelectronics fans are capable of collecting and not such simple devices, but we do not recommend regular users to conduct similar experiments.

Aliexpress.com offers separate receivers wireless devices For some models of smartphones, among which the ruler, Google Nexus. It is enough just to install it. Under the lid at the device there are two contacts that provide a positive and negative pole. It is enough to buy and connect the receiver, after which you can spend a test wireless charging. Such an output is optimal if you somehow have a wireless charger, for example, you were presented with a gift, and your gadget model does not yet support the Qi function.

Battery charge wireless technology is gaining increasing popularity in the modern world. In the future, in many public places it will be possible to fill the capacity of the battery. It is expected that wireless chargers Stadiums, parks, restaurants, cinemas, fast food will be equipped. When buying smartphones, we recommend paying for support for QI function, which is present in all flagship models of 2015.