Otaku Engineer in Great Tang Dynasty Chapter 321: First fantasy of wireless broadcasting!

"Sir, if this telegraph machine is modified, can it also be used in newspapers? People will be able to use the telegraph machine to obtain information in the newspaper in the future."

Li Mansion West Courtyard.

Li Yu watched Li Zexuan and Cheng Chumo frantically there for a while, she suddenly suggested with an open mind.

"Huh~? Xiaoyuer, you are such 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! Thinking of the time when Cheng Yaojin, Qin Qiong, Yuchi Jingde and many other great lords, carrying a radio, gathered together to listen to the radio, bragging, tut, this picture is very interesting to think about!

"Uh, do you think it is feasible, sir? But this telegraph machine can only make a "di di di" sound, and it needs to bother to convert it into text, I am afraid it will be very troublesome~~"

Li Yu heard Li Zexuan's approval, she was excited for a moment, but then she thought of the problem of telegram translation, the little girl held her chin, frowning.

"Hehe, this is not a problem. As long as we make a slight modification on the basis of the telegraph, then we will not only receive the voice of "Didi", but can directly hear the voice of the other party. There is no longer a cumbersome conversion process in the middle!"

Li Zexuan smiled easily.

The telegraph he is making now can only control the length of the sound according to the length of time the current is turned on and off, but even so, it is already a huge improvement, because this process has realized the use of electricity and magnetism. Conversion to achieve the purpose of long-distance signal transmission.

Imagine that if you add a speaker to the terminal of the ticker, when the ticker receives information, it will generate an AC audio current of the frequency corresponding to the original sound signal. This current passes through the speaker. When the coil (also called the voice coil in the speaker), the corresponding magnetic field is generated in the voice coil, and this magnetic field generates an interaction force with the magnetic field generated by the permanent magnet on the speaker.

So, this force makes the voice coil 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 The process.

"My Cao! This hang! This hang! With this thing, can't you be able to transmit sound from thousands of miles? Damn, it's almost the same as the magic weapon used by the gods!"

Cheng Chu yelled in excitement, and his mouth was full of "Saohua", just yelling "66666666", which made Li Zexuan quite speechless, if he didn't know, he would think it was a modern crossing Come here!

"Have you ever seen a fairy? Or have you used a fairy artifact?"

Li Zexuan rolled his eyes, not feeling good.

"Hey, I haven't seen it before, it doesn't mean that I haven't heard it! Xiaoxuan, isn't it in the "Journey to the West" that you told us earlier? Hurry up and make a telegram that can spread the message you just said. Machine, give me a joke at that time!"

Cheng Chu silently rubbed his hands and said with a smile.

"Fuck your girl! I don't have one myself. Where can I get one for you? Do you think that stuff is so easy to make? Anyway, I can't make it now!"

Li Zexuan was speechless.

The production of speakers is not difficult. The materials can be obtained with a little effort. When he was in elementary school, he made simple speakers by 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 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. It is still a waste.

However, for modulation and demodulation, some peripheral circuits are needed to assist. In this era, without resistors, capacitors, diodes, and transistors, Li Zexuan can only express powerlessness, or Datang’s scientific background is too weak and relevant There are too few talents in this area.

"Hey, it would be great if we could train a group of talents in the field of electricity. We don't expect to invent computers and TV sets, just get a radio. Then we will pay our own money to build a "Datang People's Broadcasting Station". Cultivate a group of broadcast talents so that you can listen to the broadcast at home. Tsk tsk, in this way, the life in Datang will not be too boring!"

Li Zexuan said silently in his heart.

The source of motivation that supported him tirelessly inventing new things was just to not be too boring in ancient times. As for the strengthening of national power, it is not within his consideration, because in his opinion, the current Datang has already It's powerful enough, no extra black technology is needed at all, but the entertainment life of the Tang Dynasty is too scarce, he needs to lead the trend!

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

Li Yu understood the meaning of Li Zexuan's words and asked disappointedly.

"Well, it's very difficult!"

Li Zexuan sighed with his hands on his back and said: "But I can't say that I can't do it! The main reason is that I have too few talents in this aspect of Datang. Nowadays, scholars are studying the Four Books and Five Classics. Willing to delve into this? If I only rely on my own strength, I am afraid it will be difficult to do it!"

Actually, the main reason is that this guy is too lazy. If he is cruel and stays closed for two months to study hard, and then with his abnormal mental power, it is really possible to solve the existing technical problems, but the problem is that he can’t help himself. Yeah! The rich second-generation life is gracious, but why bother to fight hard in the “frontline of scientific research”?

I made telegraphs in Zuifengxuan a while ago, and Li Zexuan has deeply felt how difficult it is to make things without a modern industrial foundation~IndoMTL.com~! Now he has some ideas in his mind, that is: when the time is right, teach a group of disciples, teach them engineering, teach them basic scientific concepts, let them explore and delve on their own, and they can work on specific Inventing various scientific concepts under the circumstances, making great "discoveries" one after another, and silently being a "grandfather" who knows everything in the eyes of the world, isn't it a good thing?

For example, you can lead students to "through observation and experimentation" to sum up Newton's three laws, and name them with their own names, such as "Zexuan Three Laws";

Also, I can put forward the theory of "Big Bang" in the form of "hypothesis", and use "wisdom far beyond the times" to propose that everything is composed of microscopic particles such as molecules and atoms, and weirdly pushed it in the Tang Dynasty Performed the periodic table of elements, maybe it will become a celestial picture that no one can understand for thousands of years;

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

Wait, wait, there are too many examples of this, but I want to be the greatest scientist in human history, how can I make things hard every day?

Li Zexuan's ideas are perfect, but they are just ideas. After he crossed over, troubles occurred one after another, and there was no time to realize his great ideal.

The only gratifying thing is that he has brought modern mathematics to this era. There are already a group of children who have mathematical thinking. You must know that mathematics is the most important foundation for engineering. If he develops engineering in the future, he will now learn These students in the library are definitely his priority. )Download the free reader!!