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 from the newspaper in the future."
Li Mansion West Courtyard.
After 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! You have a very good idea!"
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 big gents, 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 can only make a "di di di" sound, and it needs to bother to convert it into text, which is very troublesome~~"
When 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 and said with a sad face.
"Haha, this is not a problem. As long as we make a slight modification on the basis of the telegraph machine, we will not only receive the voice of "Dididi", but can directly hear the voice of the other party. A tedious conversion process is needed again!"
Li Zexuan smiled easily.
The telegraph he made 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 realizes the use of electricity and magnetic 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 the information, it will generate an alternating 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 the voice coil), 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.
As a result, this force causes the voice coil to vibrate with the audio current in the magnetic field of the speaker with its 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, wouldn't it be possible to transmit sound from thousands of miles? Damn, this is almost the same as the magical weapon used by the gods!"
Cheng Chu exclaimed in excitement, and his mouth was full of "sorrowful words", only to shout "66666666", which made Li Zexuan quite speechless. If he didn't know, he would think that it was from modern times. !
"Have you ever seen a god? Or have you used a weapon?"
Li Zexuan rolled his eyes, not having a good temper.
"Hey, I haven't seen it, it doesn't mean that I haven't heard it! Xiaoxuan, isn't it in the "Journey to the West" you told us earlier? You quickly make a telegraph machine that can transmit the message you just said. Time to play for me!"
Cheng Chu silently rubbed his hands and said with a smile.
"Fuck your sister! 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 some effort. When he was in elementary school, he made simple speakers by himself. The tools and materials used were very common, such as paper cups, copper wires, glue, small magnets, The production process of double-sided tape, scale, scissors, etc. is also relatively simple.
The real difficulty of the loudspeaker lies in the modulation and demodulation of the sound. Without this step, your loudspeaker 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 related talents Too little.
"Oh, 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 televisions, just get a radio. Then we will pay for ourselves to build a "Datang People's Broadcasting Station" and then train another one. Criticize broadcasting talents, so that you can hear the broadcast at home, tsk tsk, in this way, life in Datang will not be too boring!"
Li Zexuan said silently in his heart.
The source of motivation to support him tirelessly inventing new things all the time is just to not be too boring in ancient times. As for the expansion of national power, it is not within his consideration, because in his opinion, the current Datang is already strong enough. , There is no need for any extra black technology 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 area. Now the scholars are studying the Four Books and Five Classics. Who would like to study this? If it’s only by my own power, I am afraid it will be difficult to make it!"
In fact, the main reason is that this guy is too lazy. If he is cruel and retreats for two months to study hard, and then rely on his perverted mental power, it is really possible to solve the existing technical problems, but the problem is that he is cruel! The rich second-generation life is gracious, but why bother to struggle in the
frontline of scientific research
?
A while ago in Zuifengxuan retreat to build a telegraph, Li Zexuan has deeply felt how difficult it is to make things without a modern industrial foundation~EbookFREE.me~! 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 an omniscient "grandfather" in the eyes of the world. Isn't it a good thing?
For example, you can lead students to "through observation and experimentation" to summarize Newton's three laws, and name them by themselves, such as "Zexuan's Three Laws";
In addition, 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 like molecules and atoms, and weirdly deduced the elements in the Tang Dynasty. The periodic table may become a celestial map that no one can understand for thousands of years;
For another example, when I brought my children at home, I sculpted a 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, there was trouble one after another, and there was no 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. You must know that mathematics is the most important foundation of engineering. If he vigorously develops engineering in the future, he will now count these in the library. Students are definitely his priority. ) Download the free reader!!