"Sir, if this telegraph machine is modified, can it also be used in newspapers? In the future, people will be able to obtain information in newspapers through the telegraph machine."
The west courtyard of Li Mansion.
After Li Yu watched Li Zexuan and Cheng Chumo having fun there for a while, she suddenly suggested something with great imagination.
"Eh~? Xiao Yu'er, you are such a genius! Your idea is very good!"
Li Zexuan's eyes lit up and he exclaimed,
What Li Yu said is almost equivalent to modern wireless broadcasting! Thinking about that time, 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 scene is quite touching!
"Uh, sir, do you think it's feasible? But this telegraph machine can only make a "beep-beep-beep" sound, and you need to take the trouble to convert it 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 held her chin and said with a sad face.
"Haha, this is not a problem. As long as we slightly modify the telegraph machine, we will not only receive the sound of "didi", but can directly hear the other party's voice without any interruption. No more tedious conversion processes!”
Li Zexuan smiled easily.
The telegraph machine he is making now can only control the length of the sound according to the length of time the current is on and off. But even so, it is already a huge progress, because this process realizes the use of electrical and magnetic conversion to achieve The purpose of long-distance signal transmission.
Just imagine, if a loudspeaker is added to the terminal of the ticker, then when the ticker receives the information, an AC audio current with a frequency corresponding to the original sound signal will be generated. This current passes through the coil of the loudspeaker (in (also called voice coil in the speaker), 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.
As a result, this force 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. This also realizes the conversion from sound to current, and then from current to sound. process.
"Oh my God! This Diao! This Diao! With this thing, wouldn't it be possible to transmit sounds thousands of miles away? Damn, this is almost the same as the magic weapon used by the gods!"
Cheng Chumo shouted excitedly, and he also said "a lot of dirty words", so he only shouted "66666666", which made Li Zexuan quite speechless. If he didn't know better, he would think that this guy was from the modern time. !
"Have you ever seen an immortal? Or have you ever used an immortal magical weapon?"
Li Zexuan rolled his eyes and said angrily.
"Hey, just because I haven't seen it, it doesn't mean I haven't heard of it! Xiaoxuan, isn't it in the "Journey to the West" you told us about before? Hurry up and make a telegraph machine like the one you just mentioned that can send messages. It's time for me to play!"
Cheng Chumo rubbed his hands and chuckled.
"I'm kidding you! I don't even 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 said speechlessly.
Making a speaker is not difficult. As for the materials, you can get them with a little effort. When he was in elementary school, he made a simple speaker by himself. The tools and raw materials used are very common, such as: paper cups, copper wire, glue, small magnets, Double-sided tape, scale, scissors, etc., the production process is relatively simple.
The real difficulty of a speaker lies in the modulation and demodulation of sound. Without this step, your speaker can only emit irregular sounds, cannot restore human voices, and is still useless.
But for modulation and demodulation, some peripheral circuits are needed to assist. In this era, there are no resistors, capacitors, diodes, and transistors. Li Zexuan can only express his powerlessness. Datang's scientific foundation is too weak, and the talents in related fields are too weak. Too little.
"Well, it would be great if we could train a group of electrical talents. We don't expect to invent computers and televisions, just make a radio. When the time comes, we will build a "Datang People's Broadcasting Station" with our own money, and then train a group of talents. Approval of broadcasting talents, so that you can listen to 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.
The source of motivation that supports his tireless efforts to invent new things has always been to avoid being too boring in ancient times. As for increasing national power, he has not yet considered it, 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 lacking, and he was needed 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 with some disappointment.
"Well, it's quite difficult!"
Li Zexuan clasped his hands behind his back, sighed deeply, and said, "But it doesn't mean that it can't be done! The main reason is that there are too few talents in this field in Datang. Nowadays, scholars have all gone to study the Four Books and Five Classics. Who is willing to delve into this? ? If I only rely on my own strength, 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 ruthless, studies hard in seclusion for two months, and relies on his abnormal mental power, it is really possible to solve the existing technical problems, but the problem is, he can't be ruthless! Why should the second-generation rich people who are enjoying themselves have to struggle so hard to be on the "frontline of scientific research" when their life is so easy?
The recent retreat in Zuifengxuan to build a telegraph machine made Li Zexuan deeply aware of how difficult it is to make things without a modern industrial foundation! Now he has some ideas in his mind, that is: when the time is right, teach a group of disciples, teach them specifically about engineering, teach them basic scientific concepts, and let them explore and study on their own, so that they can work in specific fields. Isn't it wonderful to invent various scientific concepts under the circumstances, make great "discoveries" one after another, and quietly be a "grandpa" who knows everything in the eyes of the world?
For example, you can lead your apprentices to summarize Newton's three laws "through observation and experiments" and give them their own names, such as "Zexuan's three laws";
Also, he can put forward the theory of the "Big Bang" in the form of a "hypothesis", and use "wisdom far beyond the times" to propose that all things are composed of microscopic particles such as molecules and atoms, and weirdly deduced the elements in the Tang Dynasty The periodic table may become a celestial map that no one will be able to understand for thousands of years;
For another example, when I was taking care of my children at home, I carved a prism out of ice and discovered that sunlight is composed of colors, and used this to explain the formation principle of a rainbow:
Wait, wait, there are too many examples like this. If you want to be the greatest scientist in human history, how can you work hard to create things every day?
Li Zexuan's ideas were perfect, but they were just ideas. After he traveled through time, he encountered troubles one after another and had no time to realize his great ideal.
The only good thing is that he brought modern mathematics to this era. A group of children already have mathematical thinking. You must know that mathematics is the most important foundation of engineering. If he vigorously develops engineering in the future, these students in the Mathematical School now Students must be his priority.
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