How to make a wireless phone charger. How to add wireless charging to any smartphone

There are situations when the smartphone has almost turned off, and there is no charging nearby or there is no electricity. Then certain knowledge will help to solve the following problem: a new device is a wireless induction charging, you can make it yourself. Do-it-yourself wireless charging is not only a great option for solving many problems in terms of restoring the performance of a mobile phone, but also a great opportunity to experiment a little.

Work process

The term "wireless charging" refers to the induction process. The idea behind the wireless charging circuit is pretty simple. The role of this device will be played by the transmitter, and the device consists of two circuits - a transmitter and a receiver.

The receiver (standard coil) is located in the smartphone, the transmitter is created in the form of a small and beautiful stand with a transmitter coil inside.

Electricity passes from one circuit to another through induction, which occurs in the second circuit, the current is first rectified and transferred to the battery. In the form of a rectifier, you can take a weak diode.

Wireless Charging Phones

In the last paragraph, the mechanism of manual charging for the phone was disassembled. After reading this paragraph, you can understand that according to the Qi standard, a wireless device will work if a receiver-receiver is turned on in the phone. Such a receiver can receive energy from a specific magnetic field that is generated in the coil. Which smartphones support this device? Almost all new smartphones and tablets are made with this technology in mind. Firms that support this feature: Yota, Sony, Nokia, Samsung and so on.

Reasons for making

How to make a portable smartphone charger? This question does not bother anyone, but only until the moment, until they encounter difficulties that may await everyone. So, why would you need to create such a device? Main reasons:

• Phone battery breakage - before buying a new one.
• Possibility of recharging a mobile phone where there is no network and electricity.
• Making a spare battery for a smartphone.

Making a homemade charger

Is the wire input not working on an old or new smartphone? Now that's not a problem! After all, you can make a wireless charger for your phone yourself. Detailed job description:

Done: If you put the smartphone with the receiver under the lid inside the transmitting ring with the screen up, the battery will quickly receive energy. This is how easy it is to create and turn on a wireless charger with your own hands.

Connecting and charging a smartphone

How do I use wireless charging? Very easy. You need to connect the device to a power source, then put it on a smooth surface, and put the smartphone on top. It must be put in such a way that the battery enters the range, that is, the middle of the back. It's so easy to use your own phone charger.

Important information! Laptops and camcorders, cameras and tablets - all these gadgets will require constant power supply... It is quite difficult to store or carry around a huge set of several thick wires.

To get rid of this problem, many years ago, a couple of the world's most popular mobile phone manufacturers agreed to implement a single standard in the use of chargers.

New and old devices that support this great feature are marked with the Qi sign. It is planned to equip restaurants, libraries and other important places with this special equipment. Many firms create samples of furniture in the work panel of which you can add this charge. It will only be necessary to put the smartphone on a special area (at night or during the day), as the energy begins to flow.

Attention, only TODAY!

It doesn't take much to equip your beloved smartphone with the flagship wireless charging function.

First, the base, which is also the charger. Most often it is performed in the form of a small round platform with an outlet for a charger. For the experiment, let's take an unnamed model with a nice blue backlight. Powered by a 5 V, 2 A power supply unit (regular USB), powered via a standard microUSB port. At the output, the device gives a current with parameters 5 V, 1 A, which is enough to charge most devices even in operating mode.

The second necessary element of modernization is the antenna, with the help of which the smartphone is charged at a distance. Usually this distance is minimal, by the way, but the convenience of using without wires for someone may be significant. For example, the base can be built into the dashboard of a car or put on a chest of drawers near the bed: come, put it down, go to bed. And no searching for wires.

There are many different universal antennas for smartphones on the market. They are also suitable for other equipment, but here you need to think about placement. The antenna (we have an unnamed Chinese copy) is a coil with a board hidden in a paper-like envelope. A wire with a microUSB plug comes out of it, although if desired, it can be soldered to any other. Pay attention: the coil only works in one position in relation to the charger. Since the cable for connecting to the smartphone is flat, it may be necessary to open the bag and turn the coil for the antenna to work (as in our case). The coil should point with the open side towards the charger.

Attention: the necessary parameters of the power supply are indicated on the charging base (in the case of the used one - 5 V, 2 A). They need to be provided. At lower amperage, charging will be very slow. It may be necessary to replace the cord from the charger kit for adequate operation, since not every USB cable can pass a full 2 \u200b\u200bA through itself. As you can see,

Imagine: you are holding a cell phone in your hands and talking with a friend, and at this moment your phone is charging, and most importantly, the charger wires do not stick out from it. I offer two ways to implement this idea, or rather one way - the method of induction of current without wires, and there are two design options for such a wireless charger.

The first option is the simplest, it is made exclusively according to the transistor circuit, the frequency is set using a multivibrator, then the signal is amplified by transistor stages.

Two coils (rings) that do not have a core, so by the law of induction due to free oscillations in the second circuit, we obtain an alternating voltage, which is rectified using a diode bridge, then stabilized using a capacitor, and for final stabilization, a zener diode must be installed at 6 volts. So, as a result, we get a master device (transmitter) that is powered from a voltage of 10-12 volts, the device creates a magnetic field due to the coil, and the receiver in which an electric voltage is generated. The transmitter and receiver have identical coils, although they can be resized for experimentation.

The second version of the wireless charger circuit is made on the UC3845 chip. The microcircuit plays the role of a master oscillator, and a powerful field-effect transistor amplifies the voltage. The choice of the scheme is yours, I can only say that both schemes are good and have been tested more than once. You should not change the denominations of the parts, they have already been carefully selected, experiments can only be performed over the coils, but we offer an option with which you can charge a mobile phone at a distance of half a meter from the transmitting circuit. If you decide to assemble the first option (a circuit on transistors), then all transistors (except for multivibrator transistors) must be installed on heat sinks, a heat sink is also needed for a field-effect transistor in the second circuit. The microcircuit does not need a heat sink. The 820 ohm resistor in the second circuit must be selected with a power of 2 watts.

The second circuit (receiver circuit) was used from an old hard disk (disassemble the device and see where it stands), the coil is what you need, provides the desired voltage and has a compact size, you can adapt it to the back of a mobile phone, it is advisable to use diodes for rectification in smd execution, to save space, a capacitor with a voltage of 16 volts, a capacity from 220 to 470 microfarads. We connect the power supply through the appropriate plug to the mobile phone, then turn on the transmitter (the transmitter is powered from a stabilized power source of 10-12 volts, current from 3 amperes), then you just need to put the mobile phone 10-50 cm from the transmitting coil.

Now it's time to move from theory to the practical application of this design. We will look at each of these methods separately. Let's start with the transistor circuit. For this circuit, you need to have two power supplies, the first 3.7-5 volts (to power the low-voltage circuit) and 12 volts 4-10 amps to power the transistor stage. Transistors in a multivibrator can be used like kt315 or its domestic and imported counterparts. The rest of the transistors such as kt819 or analogs, they must be installed on the heat sink. The transmitter coil has 20 turns, is wound with a wire with a diameter of 0.5-1 millimeter, the diameter of the coil is from 5 cm to 1 meter (the diameter is selected based on the needs).

The receiver circuit consists of 30 turns of wire with a diameter of 0.5-0.8 millimeters, its diameter is no more than 10 centimeters. The circuit is capable of charging your mobile phone at a distance of up to half a meter! You can rectify the charging current with a diode bridge or using just one diode, a capacitor with a capacity of 220 - 470 microfarads (it makes no sense anymore).

The second circuit is more complex, but it has greater stability, the circuit is powered by a voltage of 10-14 volts, while a constant voltage source of 3-10 amperes is needed. A field-effect transistor, it will warm up and you need a bigger heat sink! The 820 ohm resistor, as already mentioned in the first article, is needed with a power of 2 watts, ceramic capacitors marked 105 have a capacity of 1 microfarad. The number of turns of the coils and the diameter of the wire are the same as in the first circuit, the rectification and stabilization of the receiver current occurs in the same way as in the first design.

During such charging, the distance between the transmitting and receiving coils plays an important role, the closer they are to each other, the greater the voltage in the second circuit, and in order not to burn the phone, the transmitter must be supplemented with a voltage stabilizer of 6-7 volts, such stabilizers you can get it by disassembling an ordinary mobile phone charger. Such a wireless charger can charge your mobile phone in a very short time, since the current in the second circuit can reach more than one ampere. In this way, you can charge a laptop or other devices that are charged or powered by a low-voltage constant voltage source. Think carefully where you could use such a wonderful device that allows you to transmit voltage without wires! The storage areas are very large, we leave the choice up to you!

There are situations when a mobile gadget has almost turned off, and there is no native charging at hand or there is no electricity. Then some knowledge will help solve this problem: a new invention is wireless charging, you can make it yourself. It is convenient to use, even if there is no car charger nearby.

The answer to this question is yes. Anyone who has an elementary understanding of the properties of wires and current can make it. Before you build such a structure with your own hands, you need to take care of the availability of all materials - a diode and copper wire. Any plastic box, for example, from a CD, can serve as a case. You will also need transistors (bipolar or any other), preferably field ones - they will make the battery charging faster. All other tools are in every apartment, including glue and scissors.

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How wireless charging works

The principle of operation of this type of charging is based on induction, the property of a coil to transmit electric current when in contact with a receiver. When connected to any power source, the device becomes a hotbed of perpendicular magnetic field. If you place two coils close to each other, one of them is connected to any power source, the second one will have a voltage of a certain strength and energy for the mobile phone. This effect is possible if the two coils do not touch each other in any way. DIY wireless charging is a reality.

How to charge your phone

Almost everyone can make a portable wireless charger with their own hands, following the instructions. The whole process consists of two parts: making a transmitter (inside) and a receiver (outside). The first of them is separate, the second is installed in the phone. The convenience of this solution is that you can always take your charger with you.

Transmitter device:

1. In advance, it is necessary to prepare a frame with a diameter of 7 to 10 cm. Wrap about 40 turns of wire (exclusively copper, with a diameter of 0.5 mm) on it, not forgetting to make a bend in the middle after 20 circles. To do this, twist the wire, make a branch and continue winding.
2. Connect a transistor of absolutely any value to the end of the coil and to the tap. If a direct conduction device is used, the polarity must be reversed when connecting.
3. Install in a plastic disc box or any other. Close.
4. The electricity transmission device is ready.

Receiver device:

1. Unlike the transmitter, it has a flat appearance. Consists of 25 turns, while the wire must be taken a little thinner, in the range of 0.3-0.4 mm. Gradually the receiver needs to be reinforced with superglue.
2. Separate the contour from the plastic base on which it was wound using a knife.
3. Connect it through a diode (high frequency silicon is best) and attach it to the top of the battery. A capacitor is used to stabilize the voltage.
4. Connect to the charging connector. In some cases this can be done directly with the battery, but the battery full sensor will not work.
5. Close the back cover of the mobile phone. The receiving device is ready.

To use the charger, simply place your mobile phone on top of the transmitter. In this case, you need to monitor the sensor on the smartphone screen. There is another circuit for this device using a voltage amplifier and a resistor. Such wireless charging with your own hands can also revive a mobile phone without electricity, but it is recommended to be used only by experienced craftsmen.

Cons of using the device

At first glance, it may seem that a do-it-yourself phone charger is an ideal option, and you shouldn't spend money on expensive store counterparts. Self-made charging has some disadvantages, for example, the process takes much longer, since the power is small. This minus is not the worst, but there is always a risk of confusing the polarity of the transistor. In the best case, the mobile phone simply will not charge, in the worst case, it will deteriorate: overheating may occur, and the device, made by hand, will fail.

Video: how to make a wireless charger for your phone

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Every person who does business and works face to face with clients should carry a business card with him. A business card with contact details and initials will help save time when working with a client and show the level of professionalism. To make a card design, it is not necessary to go to a printing house and pay money for it. In this article we will tell you how to make a business card on your own computer.

Microsoft Word

The functionality of Microsoft Word is not limited to typing and formatting. Using this program, you can arrange a business card in a short time and put it in print. For work, we use the editor Microsoft Word 2013:

1. First, select the background of the future card. Download a picture from the Internet or use a previously prepared one.
2. Open Word → Insert → Pictures → Insert Picture.
3. Make the proportions you want. To do this: RMB on the picture → Picture format → Crop.
   
4. We set the width - 5.3 cm, length - 8.6 cm. If necessary, turn the image over. Go to Layout and Properties → Effects and apply filters to the photo to make the background look more effective.
   
5. The background is ready, now let's start writing. We write the necessary information next to the picture.
   
6. After RMB on the background → Text Wrap → Behind the Text → Place the text where needed.
   

In five minutes of work, we get a ready-made basis for a business card.

Online services

Free online services allow you to create a business card using only a browser. We'll talk about two of the most popular and easiest to use.

Logaster

Logaster holds a high position in the Russian-language segment of online services. He especially helps out those who are just starting their own business. Before creating a business card on Logaster, you need to create a logo. A variety of icons and fonts allows you to create very beautiful and interesting logos, on the basis of which business cards are created.

So let's take a step-by-step look at the process of creating business cards using this service.

1. Create a logo and register on the site.
   To create a logo, you just need to enter the name of the company and, if required, the slogan. Then select the logo you like and save.
   
   
2. Choose a business card layout and enter your personal information.
   
   
3. Pay for the designs you like to be able to download it
   
4. Download products and send your business cards for printing. In just a few minutes of this entertaining process, you get high-quality files of great business cards in PDF and PNG formats, ready for printing.

Business card

The online program "Business Card" is also popular. The creation of business cards in it is as follows.

Important! In addition to text and online editors, business cards are created in graphics programs, such as Paint, Photoshop.

Video instruction

An illustrative example of how to create a card in the graphics editor Photoshop.