Otaku Engineer in Great Tang Dynasty

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

The West Courtyard of Li Mansion.

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

"Huh~? Xiaoyuer, you are a genius! Your idea is very good!"

Li Zexuan's eyes lit up and exclaimed,

What Li Yu said is almost equivalent to modern wireless broadcasting! When I think about the time when Cheng Yaojin, Qin Qiong, Yuchi Jingde and other big men, carrying a radio, gathered together to listen to the radio and brag, tsk tsk, this picture is very emotional!

"Uh, do you think it's feasible, sir? But this telegraph can only make a "di-di-di" sound, and it needs to be converted into text. I'm afraid it will be very troublesome~~"

When Li Yu heard Li Zexuan's approval, she was excited at first, but then she thought of the problem of telegram translation, the little girl propped her chin and frowned.

"Hehe, this is not a problem, as long as we make a little modification on the basis of the telegraph, then we will not only receive the sound of "dididi", but can directly hear the voice of the other party, and there will be no difference in the middle. No more tedious conversion process needed!”

Li Zexuan smiled lightly.

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

Just imagine, if a speaker is added to the terminal of the receiver, when the receiver receives the information, it will generate an AC audio current of the frequency corresponding to the original sound signal. This current passes through the coil of the speaker (in When the speaker is also called voice coil), a corresponding magnetic field is generated in the voice coil, and this magnetic field interacts with the magnetic field generated by the permanent magnet on the speaker.

This force then causes the voice coil to vibrate with the audio current in the magnetic field of the speaker's own permanent magnet. 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 conversion from sound to current, and then from current to sound. process.

"My Cao! This hanging! This hanging! With this thing, wouldn't it be possible to transmit a sound from a thousand miles? Damn, it's almost the same as the magic weapon used by the gods!"

Cheng Chumo shouted excitedly, and his mouth was full of rhetoric, so he only had to shout "66666666", which made Li Zexuan quite speechless. !

"Have you seen an immortal? Or have you used an immortal magic weapon?"

Li Zexuan rolled his eyes and said angrily.

"Hey, I haven't seen it, it doesn't mean I haven't heard it! Isn't it in "Journey to the West" that you told us earlier? Time to play with me!"

Cheng Chumo rubbed his hands and laughed.

"Playing with your sister! I don't have one myself, where can I get one for you? Do you think that thing is so easy to make? I can't make it now anyway!"

Li Zexuan was speechless.

It is not difficult to make a speaker. As far as materials are concerned, you can get it with a little effort. When he was in elementary school, he made a simple speaker himself. The tools and materials used are very common, such as: paper cups, copper wires, glue, small magnets, Double-sided tape, scales, scissors, etc., the production process is also relatively simple.

The real difficulty of the speaker lies in the modulation and demodulation of the sound. Without this step, your speaker can only emit irregular sounds and cannot restore the human voice, which is still a waste.

However, for modulation and demodulation, some peripheral circuits are needed to assist. In this era, there are no resistors, capacitors, diodes, and triodes. Li Zexuan can only express his powerlessness, or Datang's scientific background is too weak, and related talents Also too little.

"Well, it would be great if we could train a group of electrical talents, instead of inventing computers and televisions, we could just get a radio. Then we would build a "Datang People's Broadcasting Station" at our own expense, and then train another one. Criticize broadcast talents, so that you can hear the broadcast at home, tsk tsk, in this way, life in the Tang Dynasty will not be too boring!"

Li Zexuan sighed silently in his heart.

All along, the source of power that supports him tirelessly inventing new things is just to not be too boring in ancient times. As for the expansion of national strength, it has not been in his consideration, because in his opinion, the current Tang Dynasty is already strong enough. , there is no need for any additional black technology at all, but the entertainment life in the Tang Dynasty was too scarce, and he needed him to lead the trend!

"Sir, is this difficult? Is it impossible to do it?"

Li Yu understood what Li Zexuan meant, and asked in disappointment.

"Well, it's quite difficult!"

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 I have too few talents in the field of Tang Dynasty. Now the scholars are all studying the Four Books and Five Classics, how can anyone want to study this? If it's just me, I'm afraid it will be very difficult to do it!"

In fact, the main reason is that this guy is too lazy. If he is cruel and hard-hearted, retreats for two months and studies hard, and then relies on his abnormal mental power, it is really possible to solve the existing technical problems, but the problem is, he can't be cruel! The rich second generation of the leisurely and leisurely life will not

However, why do you have to work so hard to be in the "front line of scientific research"?

A few days ago, Li Zexuan deeply felt how difficult it is to make things without a modern industrial foundation when he closed down at Zuifengxuan to build a telegraph machine! Now he has some ideas in his mind, that is: when the time is right, teach a group of disciples, specialize in teaching them engineering, teach them basic scientific concepts, let them explore and study on their own, and they can learn in specific Wouldn't it be nice to invent various scientific concepts under the circumstances, 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 sum up Newton's three laws "through observation and experimentation", and name them by yourself, such as "Zexuan's Three Laws";

Also, I can put forward the theory of the "big bang" in the way of "hypothesis", and use "wisdom far beyond the times" to propose that everything is composed of microscopic particles such as molecules and atoms, and strangely deduce the elements in the Tang Dynasty The periodic table may become a celestial map that no one has been able to penetrate for thousands of years in future generations;

For another example, when I took care of my children at home in the future, I carved a prism out of ice cubes, and found that sunlight is composed of colors, and thus explained the formation principle of rainbows:

Wait, wait, there are too many examples like this, but I want to be the greatest scientist in the history of mankind, how can I work hard every day to create things!

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

The only thing that is gratifying is that he brought modern mathematics to this era. There are already a group of children who have mathematical thinking. It must be known that mathematics is the most important foundation of engineering. Students must be his priority.

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