Wireless self-charging: the principle of operation, successive assembly steps

Since no one has invented the eternal source of energy, it is necessary to regularly recharge the batteries of cell phones and various digital gadgets from the power grid. It is not always possible to do this in the usual way by means of a wire and an outlet. Some advanced companies have already started to release models that can be charged simply by being on the wireless device site. According to their example and "samodelschiki" do not stand aside, and try to improve even some button phones.

New? No, the long-known "old"

To understand how wireless charging works for a phone, you need to remember Nicolas Tesla and his way of transferring energy from a distance. With the help of a device using the method of magnetic induction, he more than 100 years ago managed to provide an entire state with an electric current.

How is it used now? In the charger is a built-in coil, which is the creator and transmitter of the magnetic field on the device's antenna. The receiving loop is a coil laid flat by a coil, located directly under the cover of the phone. Electromagnetic radiation occurs only after the receiver is placed in the transmitter field. Then, through the capacitors and the rectifier, the energy acts on the battery.

First, let's talk about the disadvantages of using the device

Can there be negative aspects to such a remarkable invention? It turns out that there are several of them:

• It is not known how high-frequency impulses affect human health;
• A low efficiency in the transmission of energy in this way was noted;
• For a couple of extra hours increases the time of full charging;
• If at every opportunity, without waiting for the battery to fully reset, put your phone on the charger, the operating capacity of the battery will quickly decrease;
• If the circuit on which wireless charging is collected by one's own hands is not completely correct or if the wrong accessories are used, the battery may overheat, which is "not good".

Other information is not yet available.

Instructions for modifying the "button"

Does the input for the charging lead on the old phone not work? Now this is an easy task! Take a little more than a meter of thin copper wire and rolls into a flat coil of 15 turns. To keep the spiral shape, it is fixed with super-glue or double-sided tape, leaving a couple of centimeters of wire for soldering contacts. With the charging jack of the phone, one end of the coil is connected through a pulse diode, the other through a capacitor. Wireless charging, made by myself, is not a joke, but the use of the laws of physics.

To make the transmitting circuit, the turns of 1.5 cm of copper wire are laid along a circle with a diameter of 10 cm. The winding is sealed with an insulating tape or tape, leaving both ends of the wire free. Thin copper for the transmitter is wound 30 turns in one direction. The circuit is closed by a field-effect transistor and a capacitor. Wireless charging (with your own hands) is ready: if the phone with the receiver under the lid is put inside the transmitter ring upward, the battery will begin to receive energy.

Universal wireless charging for phone

Laptops and cameras, cameras and tablets - all these devices require constant power. In addition, it is very inconvenient to store at home or carry a whole set of several different wires. To get rid of this inconvenience, some time ago several leading world manufacturers of mobile communication equipment agreed to maintain a single standard in the use of chargers.

Gadgets that support this feature are marked with the Qi logo. It is planned to equip such cafes, libraries, other public places with such technical equipment. Company IKEA develops samples of furniture, in the working panel of which will be built-in wireless charging. With your hands you will only need to put the phone or laptop in the designated place (for the night or lunch time), as the energy will begin to flow.

Really smartphone and iPhone also have to disassemble?

Wireless charging for Samsung is by far the most unusual, since it is a functional computer monitor that supports standard operating systems. Installation of this device allows not only to free the work surface from unnecessary wires for mobile phones, feeding them at a distance: when the gadget is placed on its site, charging starts automatically, and on the monitor supporting the universal Qi standard, a green LED light comes on.

Not so long ago, the inventors of Nikola Labs demonstrated one of the cases. This wireless charging for iPhone is able to accumulate uselessly wasted radio frequency radiation of Wi-Fi signals, converting it into energy. Thanks to this miracle, the working time of the smartphone is extended by almost a third.