History of the telephone June 2, 1875, by an American Alexander. Alekander Graham, Bell, invented the telephone. To this day, the door of 109 Court Road in Boston, USA, is still nailed with a block engraved: The bronze medal that the telephone was born here on June 2, 1875. On March 7, 1876, Bay received a patent for the invention of the telephone, patent number: 174655.
In the year of < P >, the rotary dial dial type automatic telephone set appeared, which can send DC dial pulse, control the automatic switch action, select the called user, and automatically complete the exchange function. Thus taking telephone communication to a new stage. By the late 1960s, all-electronic touch-tone telephones appeared. In addition to the pulse signaling mode, there is a double-tone multi-frequency signaling mode. With the development of program-controlled exchange, double audio key telephone has gradually become popular.
The first telephone (terminal) was a magnet telephone composed of a micro generator and a battery. When making a call, the user used his handThe microgenerator sends out an electrical signal to call the other party, and the other party starts the machine to form a communication loop. Later, in 1877, when T.E.Edison invented the carbon transmitter and induction line, the communication distance was extended. In the same year, the common battery telephone was invented.
years. The telephone was invented by American A. G. Bell in 1876. He uses two wires to connect two identical transmitters and receivers, which are equipped with vibrating diaphragms on the electromagnet, and first realizes the communication between the two ends. The earliest telephones were magnet telephones, which were powered by their own batteries and sent call signals by hand generatorsHe could split the earth in half whenever he wanted? Why did Tesla dare to say that he could split the earth in half whenever he wanted? Tesla, the god-like man, was once considered by some UFO enthusiasts not to be from Earth because of his advanced thinking and unlimited creativity. Because as early as the 19th century, when mankind had not yet entered the electric age, Tesla's research was not only on electricity, he had been studying alien flying saucers, and even TeslaAnd sketched out designs for alien flying saucers.
This man is the famous inventor, physicist - Nikola Tesla, he has such a personality, dare to say to split the earth in two, it is because he is really an extraordinary genius, Nikola Tesla has more than 700 inventions in his life, and these invention patents, just take out one can make his living standards appear qualitative leap. But for him, neither the Nobel Prize nor all the honors and money mattered.
And Edison's words, he only invented tungsten wire, and Edison only borrowed his oneAn alternating current to make the light bulb shine, it can be said that Edison let the light bulb light up the whole world, and the man behind it is Nicholas Tesla. That achievement alone was enough for him to say that if only I would, the earth would be split in two.
Such a great man must be very strict with his own schedule, in fact, he sleeps for only two hours a day, and in these two hours outside the time he is used to study his invention. But he once said, "If I want to, I can turn the earth.Split in two." That man was Nikola Tesla, who was born in Serbia and later joined the United States as an American scientist.
2. Note that Huawei mobile phone charging is not affected: Use the original charger to charge the battery to ensure that the charging voltage is stable and meets the standard. Try to avoid using your phone while charging. Charging while playing easily leads to high battery temperature, and long-term discharge at high temperatures will exacerbate battery loss. Please try...Avoid waiting until the battery charge is less than 20%, the more the battery discharge discharge, the greater the loss of the battery will be.
3, it is recommended that you try to avoid using the mobile phone while charging. Using the mobile phone while charging is easy to cause the mobile phone to heat up, and long-term discharge at high temperatures will aggravate battery loss.
4, if the use is vivo mobile phone, the battery is a consumable, with the increase of the number of mobile phone charging, the actual capacity of the battery will be reduced, the normal service life of a battery is 2-3 years.
5, the battery life is affected. Wireless grass for Figure Shorten the charging time, fast charging takes the way of increasing voltage and current or increasing voltage and current at the same time. In terms of mobile phone charging, in order to achieve fast charging, it is not only necessary to improve technology, but also to support fast charging of the mobile phone itself and cooperate with the corresponding fast charging appliances (including charging head and charging line). Therefore, when using mobile phone charging, it is recommended to avoid frequent fast charging to extend battery life.
6, if the mobile phone is a lithium battery, frequent charging is actually good for the battery. There is a saying: each mobile phone battery has a fixed number of charges, if the number of charges is too muchWill speed up the degree of battery aging strain Wireless charging sketch ! This practice is actually just the practice of nickel batteries, lithium batteries are not the same, frequent charging is actually good for the battery. When the phone battery is too low, it should start charging in time.
1, Samsung supports wireless charging mobile phone models more wireless charging sketch , such as NoteSS8,S7 Edge, SNoteS6 and other wireless charging sketch , you need to buy a separate wireless charging base (some machines also need to buy a separate wireless charging rear shell). The tablet does not support wireless charging.
2, so wireless charging sketch , if you do not know how to choose tablet wireless charging sketch , then we can refer to Jingdong product data. COM tablet bestseller list, and rely on the authority of big data to make choices andDecision. Based on JD.COM's top selling Tablets list, I'd like to recommend 10 very good tablets for you. Let's look at the list of tablets.