"Sir, if this telegraph is modified, can it also be used for newspapers? In the future, people will be able to access the information in the newspaper through the telegraph. ”

The West Courtyard of the Lee Mansion.

After Li Yu watched Li Zexuan and Cheng Chumo messing around there for a while, she suddenly suggested with a big brain.

"Huh~? Little fish, you are such a genius! That's a great idea! ”

Li Zexuan's eyes lit up and exclaimed,

Isn't this what Li Yu said almost equivalent to modern wireless broadcasting! Think about Cheng Biting Jin, Qin Qiong, Yu Chi Jingde and other big men at that time, carrying a radio, listening to the radio together, bragging, tsk, this picture is very touching to think about!

"Uh, do you think it's feasible, sir? But this telegraph can only make a "tick tick" sound, and it also needs to bother to convert it into text, I'm afraid it's very troublesome~~"

When Li Yu heard Li Zexuan's agreement, she was excited at first, but then she thought of the problem of telegram translation, and the little girl propped her chin and said with a sad face.

"Hehe, this is not a problem, as long as the telegraph is slightly modified on the basis of the telegraph, then we can not only receive the sound of "Didi Di", but can directly hear the voice of the other party, and there is no longer a need for a cumbersome conversion process in the middle! ”

Li Zexuan smiled lightly.

The telegraph he is making now can only control the length of sound according to the length of time the current is off, but even so, it is already a very great progress, because this process realizes the use of electricity and magnetic conversion to achieve the purpose of long-distance signal transmission.

Just imagine, if at the end of the receiver, add a speaker, then when the receiver receives the information, it will produce an AC audio current corresponding to the frequency of the original sound signal, this current through the coil of the speaker (also called the voice coil in the speaker), the voice coil will produce a corresponding magnetic field, this magnetic field and the speaker on the permanent magnet generated by the magnetic field to produce an interaction force.

This force causes the voice coil to vibrate with the audio current in the speaker's magnetic field with its own permanent magnets. The diaphragm and voice coil of the speaker are connected together, so the diaphragm also vibrates, and the vibration produces the same sound as the original audio signal waveform, which also realizes the process of converting from sound to current, and then from current to sound.

"I'm Cao! This hanging! This hanging! With this thing, wouldn't it be possible to transmit sound thousands of miles? Damn, this is similar to the magic weapons used by the gods! ”

Cheng Chumo shouted excitedly, and his mouth was also "sassy words", so he only shouted "66666666", which made Li Zexuan quite speechless, if he didn't know, he would think that this forced modern time to come!

"Have you ever seen a fairy? Or have you used immortal magic weapons? ”

Li Zexuan rolled his eyes, and he didn't have a good airway.

"Hehe, just because I haven't seen it doesn't mean I haven't heard of it! Xiao Xuan, isn't it in the "Journey to the West" you told us earlier? Make a telegraph that can deliver the kind of telegraph you just mentioned, and play tricks on me when the time comes! ”

Cheng Chu rubbed his hands and said with a smile.

"Fuck your sister! I don't have my own, where can I get you one? You think that thing is so easy to make? I can't do it right now, anyway! ”

Li Zexuan said speechlessly.

When he was in elementary school, he made a simple speaker by himself, and the tools and raw materials used are very common, such as: paper cups, copper wires, glue, small magnets, double-sided tape, scales, scissors, etc., and the production process is relatively simple.

The real difficulty of the speaker lies in the modulation and demodulation of the sound, without this step, your speaker can only produce irregular sound, unable to restore the human voice, or a waste.

But modulation and demodulation, you need some peripheral circuits to assist, in this era, there are no resistors, capacitors, diodes, transistors, Li Zexuan can only say that he is weak, or Datang's scientific background is too weak, and there are too few talents in related aspects.

"Alas, it would be nice if we could train a group of talents in electricity, don't expect to invent computers and televisions, just get a radio, and then pay for the construction of a "Datang People's Broadcasting Station", and then train a group of broadcasting talents, so that you can hear the radio at home, tsk, in this way, the life of crossing into Datang will not be too boring! ”

Li Zexuan sighed silently in his heart.

For a long time, the source of power that supported him to tirelessly invent new things was just to not be too boring in ancient times, as for the expansion of national strength, it was not within his consideration, because in his opinion, the current Tang Dynasty is strong enough, and there is no need for any additional black technology, but the entertainment life of the Tang Dynasty is too scarce, and he is needed to lead the trend!

"Sir, is this difficult? Can't you do it? ”

Li Yu understood the meaning of Li Zexuan's words, and asked with some disappointment.

"Well, it's hard!"

Li Zexuan put his hands behind his back, sighed heavily, and said, "But it can't be said that it can't be done!" The main reason is that there are too few talents in this area of my Datang, and now that the scholars have gone to study the Four Books and the Five Classics, how can anyone want to study this? If I were alone, I would have been very difficult to do! ”

In fact, the main reason is that this product is too lazy, if he is ruthless, retreat for two months and study hard, and then with his perverted spiritual power, it is really possible to solve the existing technical problems, but the problem is, he can't be ruthless! However, why do you have to work hard to fight on the "front line of scientific research"?

A while ago, he built a telegraph machine in retreat in Zuifeng Xuan, which made Li Zexuan deeply feel how difficult it is to make things without a modern industrial base! Now he has some ideas in his mind, that is: When the time is ripe, teach a group of disciples, teach them engineering, teach them basic scientific concepts, let them explore and study on their own, and they can invent various scientific concepts in specific situations, make great "discoveries" one by one, and silently be an omniscient "grandfather" in the eyes of the world.

For example, you can lead your apprentices to summarize Newton's three laws "through observation and experimentation" and give them their own names, such as "Zexuan's three laws";

In addition, he can put forward the theory of the "Big Bang" in the form of a "hypothesis", and use the "wisdom far ahead of the times" to propose that everything is composed of microscopic particles such as molecules and atoms, and strangely deduce the periodic table of elements in the Tang Dynasty, which may become a celestial diagram that no one can understand for thousands of years in later generations;

For another example, when I was at home with my children, I carved a prism with ice cubes, and discovered that sunlight is composed of colors, and explained the formation principle of the rainbow:

There are so many such examples, how can you be the greatest scientist in the history of mankind, how can you work hard every day to make things!

Li Zexuan's ideas are perfect, but they are just ideas, after he crossed over, troubles one after another, and he didn't have time to realize his great ideals.

The only thing that is gratifying is that he has brought modern mathematics to this era, and there are already a number of children who have mathematical thinking, you must know that mathematics is the most important foundation of engineering, and if he vigorously develops engineering in the future, these students in the current arithmetic hall must be his priority.

.......................

(End of chapter)