At the beginning of the civil castle, the Ming God of War was a little panicked

Chapter 410 Starting from scratch

A real telephone is a hundred times more complicated than a microphone.

Magnets, wires, and diaphragms can all be made, but this circuit board immediately stumped Tong Xuan.

Now, he has a lot of talents under his command, especially this time for the imperial examination, a large number of Jinshi did not go to the Hanlin Academy, but rushed to ask to go to the Academy of Sciences, and most of them asked to go to the electric power laboratory.

Even if there is no official position, no rank, it doesn't matter!
Even though you students have studied the Four Books and Five Classics for more than ten years, have been instilled with Confucianism since childhood, and regard these inventions and creations as miraculous skills and obscenity, the appearance of electric lights has completely subverted everyone's cognition.

Xu Pu, a talented scholar from Nanzhili, the number one scholar hand-picked by Zhu Qizhen, is still determined not to enter the Imperial Academy, nor does he want to go to the electric power laboratory.

When Tong Xuan was fiddling with the speaking tube, he stood aside and told the record about Ting Weng in Mozi's book.

However, when he saw the new blueprint, as expected... he fell silent.

"Forgive me for my ignorance, what is this thing...?"

Tong Xuan smiled wryly, "This is called a telephone."

Xu Pu asked again: "What is a telephone...?"

"You can understand it as a downwind ear, or it can be said to be a microphone with unlimited distance."

"Unlimited distance..."

Xu Pu was silent again because he didn't understand.

"That is to say, if one end is in Beijing and the other end is in Nanjing, can the message be transmitted directly?"

After a while, Tong Xuan said: "Theoretically, it is like this!"

The speed of the conversation between the two is very slow, because they have to think for a long time every time they say a word.

Xu Pu tried to make a suggestion: "We can gradually extend the copper wire and test the sound transmission effect of each length."

Tong Xuan asked: "If it's really that simple, why does the emperor have to come up with such a complicated blueprint? What are these parts for?"

Xu Pu was silent again for a while, then shook his head.

Tong Xuan sighed, and said: "Nowadays, the scale of the electric power team is getting bigger and bigger, and there are more and more new topics that come with it. To tell you the truth, I, the team leader, am already a little bit powerless."

At the beginning, all the people in the electric power laboratory ran out, and he was the only commander left. Now, thanks to the rapid expansion, it has grown to 120 people, and there are [-] various topics related to electricity. I was thinking about experiments while eating and sleeping, and I was exhausted physically and mentally.

Now that another phone call is made, Tong Xuan feels that he is about to collapse.

The two fell silent again, and the air was surprisingly quiet.

Xu Pu raised his head suddenly, and said seriously: "Tong Hanlin, the topic of the phone... I will leave it to you!"

"you?"

Tong Xuan's expression was a little surprised. Although Xu Pu had not been in the Academy of Sciences for a long time, he was the top student in the new department. It is needless to say that he is quick-witted, not to mention... I really have no energy.

I remembered that when I was in the Hanlin Academy, I also sneered at the so-called science. By chance, I became interested in thunder and lightning, and only then did I have a future choice.

Tong Xuan thinks that he is not as smart as Xu Pu, and now that the subject of telephone calls is in the dark, why not give it to him to try, maybe it will have a miraculous effect?

Taking a step back, even if the research does not produce results, the emperor did not set a time limit!
Just let him take a few people to study slowly, and when the results are produced, just report to the emperor.

"Okay, okay!"

Tong Xuan nodded emphatically, and said: "Set up a telephone research group now, and you will be the person in charge. The members of the group can be selected arbitrarily from the Electric Power Research Institute. If there is no suitable one, the scope can be extended to the entire Academy of Sciences. Then I will look for it." Dean Bei needs someone!"

Xu Pu cupped his fists and said, "Obey!"

In the afternoon of the same day, the telephone research group put up a signboard, and it was officially established.

Xu Pu didn't select candidates, but posted a recruitment notice outside, and then went back to look through the books.

Electric lights are enough to subvert cognition, and now I get a phone call and look at the blueprints on the table, and suddenly feel that more than ten years of reading books have been wasted.

Because in the Four Books and Five Classics, all of them are morality, benevolence and righteousness, and there has never been any record of natural science.

On the contrary, in miscellaneous books such as Mozishu, Ganshi Xingjing, Mengxi Bitan, etc., which are regarded as not popular, there are many treasures waiting to be discovered.

However, Xu Pu searched all the books, including a large number of peerless copies copied by Mei Chun in Nanjing, but there is still no relevant record.

During this period of time, people came to sign up one after another, but most of them were new scholars.

Xu Pu didn't pick anything, he didn't reject anyone who came, he wanted everything.

However, this research group is quite different from other groups because... there is no specific research method at all!
The research group of household electric lamps studies the material of filament, the material of lampshade, the process of extracting vacuum... In short, they all have specific directions.

There is also the battery research group, which mainly studies how to store the generated electricity, which is said to have been quite effective.

However, the telephone research group had no clue.

The only clue is a blueprint, but no one can penetrate the key.

It is almost equivalent to a project from scratch, and no one of us knows how to take the first step.

Xu Pu and others pondered for many days to no avail, so they had to bite the bullet and ask the Pope.

Zhu Qizhen recognized this person, so he asked: "The Qing family is here, what's the matter?"

"I'm stupid, and I don't understand something, so I'm here to ask the emperor to give me some advice!"

Xu Pu bent his body low, his face was ashamed.

In his cognition, the emperor has so many things to do every day, how can he have time to tutor himself with his homework?
Besides, the emperor has given the research direction, but I still can't find a solution, which is shameful!
If he hadn't been desperate, he wouldn't have come.

Zhu Qizhen wondered, "What's the matter with the Qing family?"

"About the blueprint of the telephone, I...don't understand..."

Xu Pu finally plucked up the courage to speak out the doubts in his heart.

"Where can't you understand?"

"The main thing is the circuit board. I have read all the ancient books, but I can't find any records related to it. What is the purpose of this circuit board and how to make it, please let the emperor express it!"

"Oh, you said this..."

Zhu Qizhen nodded, then shook his head and said, "I don't know either."

Xu Pu: ...

Seeing this, Zhu Qizhen had no choice but to explain: "I didn't lie to you, I really don't know."

Xu Pu was very puzzled. You drew the blueprint, but you told me you didn't know?

What about a liar?
"I came from a..."

Zhu Qizhen wanted to make up a nonsense, racked his brains, but didn't know how to make it up.

Suddenly, a flash of inspiration flashed in his mind, and he said: "A scroll, called Luban Book!"

When Xu Pu heard this, he immediately became nervous and asked, "Excuse me, Your Majesty, where is this book now?"

Zhu Qizhen didn't know where it was, he just made up nonsense.

As for the design drawings of the telephone, he himself did not know the details, but only knew the function and general principle of the circuit board. As for how to realize it, he was not a professional in communication engineering, so it was normal to not understand it!

After thinking about it, I can only find a folklore, or a kind of ancient book that is more mysterious, preferably with a mythical color, and just put it in it randomly.

Xu Pu believed it to be true, and Lu Ban Shu was the most wonderful book in ancient and modern times. According to legend, it was written by Lu Ban himself. However, most of the Lu Ban Shu handed down in the world are fragments.

Even if these fragments, most of them were not written by Lu Ban at all, but fabricated by folklore.

According to reliable historical records, Lu Ban's original surname was Gongshu, and his first name was Ban. Because he was a native of Lu, the world often called him Lu Ban.

Lu Ban's life is quite legendary. When he was seven years old, he had the ability to learn by himself. He started his own travels after his adult ceremony at the age of 15. After that, he became a teacher under Ziyou's family. In just a few months, he knew his master well. all skills.

However, his talent was not brought into full play, and he lobbied other countries, but none of them were used. After his self-confidence was frustrated, he chose to retire.

Legend has it that Lu Ban was conscripted to work in the capital shortly after he got married. Because he missed his new wife so much, he made a wooden kite in his spare time. As long as a person rides on it and recites a few spells, the wooden kite can carry him back thousands of miles. At home outside, with his wife.

His wife was particularly curious about this. Once, after Lu Ban came home, she secretly rode on the wooden kite, and after repeating the same incantations, the wooden kite flew into the sky.

However, when Lu Ban's wife was flying in the air, she gave birth suddenly, and blood flowed out.

The wooden kite was originally made using a secret method, but once it was stained with blood, its magic power disappeared immediately, and Lu Ban's wife fell from a high altitude, killing two people.

Lu Ban regretted it unceasingly, thinking that it was all his own fault, so he sealed up Lu Ban's book.

Since then, this book seems to have been cursed. If people in the world study the content of the book without authorization, they will definitely be infected with one of the lonely, widowed, lonely, lonely, and disabled, commonly known as the lack of one.

Because, this strange book is also known as "Lack of a Door", which is even more mysterious.

Xu Pu heard that the emperor learned the blueprints from Lu Ban's book, and immediately thought of the curse of missing one, and then his expression changed drastically.

Zhu Qizhen said indifferently: "When I saw it at the time, it was already incomplete. After all these years, it has already been destroyed..."

Xu Pu had no choice but to ask again: "Your Majesty, do you still remember whether there are any descriptions about telephones and circuit boards in the book?"

"This... I really can't remember..."

Zhu Qizhen could only be vague and try to evade it as much as possible.

Xu Pu frowned, and said: "My minister bid farewell!"

"Hey, wait a minute!"

Zhu Qizhen stopped him suddenly and said: "Although I don't remember the records at that time, but...the things that the ancients could make, why are we at a loss today? Many of Lu Ban's inventions and creations were just a flash of inspiration. , feel it?"

When Xu Pu heard this, he was startled for a moment, then suddenly realized, and said: "Thank you, Your Majesty, for your guidance!"

"Do you understand?"

"I understand!"

Xu Pu nodded and continued: "Your Majesty, rest assured, even if you risk your life, you must make a telephone!"

"Let you study something, why are you desperate?"

Zhu Qizhen waved his hands with a smile, and said, "You still tell me, how far have you researched?"

Xu Pu said: "I'm not afraid of the emperor's jokes, there has been little improvement these days."

"Did nothing at all?"

"The minister has made some attempts, but..."

"Don't hesitate, just say something!"

"Yes!"

Xu Pu bowed, and then said: "The original idea of ​​the ministers was to enlarge the distance of the microphone, and tested from ten steps, twenty steps, thirty steps, fifty steps, and one hundred steps respectively. Later, it was found that the distance was more than fifty steps. There is still a sound coming, but it has become very weak, and it is not clear at all."

"In addition, as the distance continues to increase, there will be more and more interference. For example, when the train is running, it will cause huge interference."

"The ministers and others have come to a conclusion that simply extending the copper wire of the microphone will not achieve the desired effect at all."

"So, I guessed that the key to the difference between the telephone and the microphone lies on the circuit board, but I don't know the mystery of it, which is puzzling!"

Zhu Qizhen nodded, although the ancients have never seen anything, this intelligence is no worse than that of later generations.

People like Xu Pu are even better than most of them.

Just relying on a sketch, without any practice, you can guess the key to the problem.

He was right, to solve the problem of long-distance signal transmission, it is on the circuit board.

Telephones look similar to megaphones, but they are vastly different.

The microphone is simply to transmit sound through the medium, but the telephone needs to convert the sound into an electrical signal, transmit it to the other end through the wire, and then convert the electrical signal into sound to complete the real-time call.

However, he only knows the principle, and he really doesn't understand how to operate it.

"You are right, the circuit board is the key, the record about this circuit board..."

Zhu Qizhen pondered for a long time, then took out a pen and paper, and said, "Come closer!"

"Yes!"

Xu Pu stepped forward and saw that Zhu Qizhen had drawn a rectangle, and then drew a few lines inside, turning around, which was very strange.

"Your Majesty, this is..."

"This is the circuit board!"

"what?"

"Don't worry, let me explain to you."

Speaking of this, Zhu Qizhen felt his scalp tingling.

Let me explain a hammer to you!

I don't understand either!
"Suppose this is a wooden board with wires on it, and the wooden board is insulated...Your power team, you should be very clear about what materials conduct electricity and what materials don't?"

Xu Pu nodded and said, "It's roughly clear."

"That's good!"

Zhu Qizhen nodded and continued: "If you want to control the current, what should you do?"

"Power up the line."

"Very well, then... what should I do if it is required that power can be passed from left to right, but not from right to left?"

Xu Pu scratched his head, then said, "I don't know."

"A new concept is introduced here, called semiconductor."

"What is a semiconductor...?"

"In layman's terms, it is a substance between conductive and non-conductive."

"Between conduction and non-conduction...what is it?"

Seeing Xu Pu's bewildered face, Zhu Qizhen had no choice but to say: "Don't worry about what it is, anyway, there is such a substance called a semiconductor!"

(End of this chapter)