Huang Xiao smiled and said to Zhu Yujian: "Shizi, King Xin, you should also go and have a look." ”

Zhu Yujian arched his hand and said, "Thank you, King Xian." ”

The group followed Fang Yizhi and waited to a room on the third floor.

Fang Yizhi pointed to the two devices on the two tables and said, "Sir, this is the transmitter, this is the receiver, and I use the power supply of the sun lamp in the classroom, and it is also equipped with a hand-cranked generator. ”

Huang Xiao nodded, stepped forward and took a closer look.

"Try it."

Zuo Maodi stepped out and sat down on the transmitter seat, while another student stepped forward and grabbed the handle of the generator.

Fang Yizhi sat on the seat of the receiver, and there was also an assistant beside him.

Zuo Maodi said: "Sir, I'll just send a sentence, long live Daming!" ”

Huang Xiao nodded.

The two students shook the generator.

Zuo Maodi began to send the report with full attention.

Zhu Youzhen and a few people saw it in a fog and didn't know why, but it was not good to bother to ask at the moment.

I had to watch silently.

Suddenly, the three of them saw Fang Yizhi's strange-looking machine, and began to move, driving a strange pen to draw rhythmic lines on the paper.

The three of them were very curious, and they really didn't understand what this reason was.

Soon, Zuo Maodi stopped sending reports.

Fang Yizhi also took a large piece of paper and spread it on the table.

Huang Xiao and the others stepped forward.

Fang Yizhi explained: "Sir, this is the pattern of the letters we recorded, and it can be translated accordingly, you see, this is D...... A…… mi

g…… wa

sui。 ”

Huang Xiao looked at it and said with a smile: "However, it is exactly the same, the sending and receiving are very accurate!" ”

Zhu Yujian suddenly realized, and lost his voice: "This is to deliver a message!" It's amazing! ”

Zhu Youzhen also understood, and looked at Fang Yizhi, Zuo Maodi and others, his eyes were full of admiration!

Fang Yizhi sighed and said: "It's too inconvenient to use a hand-cranked generator, especially the receiver, someone has to shake the handle all the time, otherwise it is possible to miss the telegram, and secondly, these codes are too simple, without the slightest secrecy, and they are very easy to be cracked by the enemy."

In addition, even if the line is too long, the signal will become weaker, which may also lead to the inability to transmit information, and the copper wire is too expensive, and after being wrapped with eucommia glue, the cost is even higher, if it is destroyed, it is useless! ”

Huang Xiao nodded and said with a smile: "Yes, you are right, the cable telegraph does have some drawbacks, have you thought of any solutions?" ”

Fang Yizhi said: "The students dismantled a sun lamp on their own initiative and found that there was an object in it, which should be a power storage machine, and the students wanted to set up another special class to study the storage of electricity, so that the practicality of the telegraph could be greatly improved!" ”

Huang Xiao smiled: "It's okay, just dismantle, your idea is right, in the solar lamp, there is indeed a battery, and the electric energy converted by sunlight is continuously injected into it, and after storage, at night or when the sunlight is not strong, you can also use the stored power supply for lighting!" ”

"Mr. Song was going to test hydropower in the Chaobai River, but he paused it because of too many things, and the students thought that they could go hand in hand, and hydropower could also be tested simultaneously, and we could build a small facility and accumulate experience," Zuo Maodi said. ”

Huang Xiao nodded.

Fang Yizhi continued: "Student, I still have some conjectures about the telegraph, since the current can restore the sound, can it take a unique sound, and encode it for secrecy measures, so that it must be stronger than the current secrecy!" ”

Huang Xiao was suddenly impressed by the other party's wisdom, Morse code was developed in 1837 two hundred years later, Fang Yizhi's idea just now, and then perfected, is the originator of Morse code, in the future, it should be called Fang Yizhi code!

"That's right! The idea is correct! And it's a promising idea! Fang Yizhi, if you can develop such a set of code, it will definitely go down in history, and this set of schemes, I think it should be named Fang's code! ”

Fang is excited by Zhida!

"Students will do their best!"

He said and said: "Sir, the telephone, because of the time, made the handset test, I just thought that in the process of the test, I found that after the handset is connected to the signal of the transmitter, it will emit a regular sound, and the inspiration is that the student will show you." ”

"Okay!" Huang Xiao is as good as a stream.

The two students assisted Fang Yizhi in moving the handset device to the table and connecting the wiring.

Zuo Maodi sent another report.

Sure enough, I heard a rhythmic ticking sound in the earpiece.

Zhu Youzhen was shocked again.

Huang Xiao couldn't help but think of the ticking sound in the spy war movie, and suddenly felt extremely familiar, and he laughed: "Not bad!" This sound is wonderful! ”

"Get a pen and paper, and I'll tell you about the direction of improvement."

Fang Yizhi was overjoyed and hurriedly took a pen and paper.

Huang Xiao simply drew the principles of the transmitter and receiver, the working principle of the dry battery, and the technical situation of the wireless.

I only saw Fang Yizhi's amazement as if I saw the sun through the clouds.

"Keep up the good work, I look forward to you coming up with practical results as soon as possible! In a few days, the armies of all walks of life will be drawn one after another, sweeping away the country and its surroundings, and will go on an expedition overseas, in this magnificent process, I hope that the telegraph you have studied can become a kind of help! ”

Fang Yizhi, Zuo Maodi and all the students were all solemn, and they got up and responded loudly!

With the wisdom of Fang Yizhi and others, Huang Xiao believes that as long as they are given time, they will definitely succeed in their research!

But as Huang Xiao said, the army that was about to be drawn out needed means of communication, so he had to dial it again, which was also the purpose of his coming.

As for the purchase of walkie-talkies and other wireless equipment, Huang Xiao thought about it, but did not implement it, once the modern equipment was brought to the soldiers of the Ming Dynasty to get used to it, the backward radio waves researched by Fang Yizhi and others would be overshadowed, and it would also seriously hit their enthusiasm for scientific research.

After all, if you want to be far ahead, you have to rely on self-reliance in the end!

He got up and left.

The crowd sent them out.

Turning back and forth.

Zhu Youzhen couldn't hold back, and the court saluted with wisdom and Zuo Maodi, and apologized again in public for the previous rudeness.

Fang Yizhi and even Zuo Maodi and other students were all teenagers, and they all smiled when they saw Zhu Youzhen's sincere apology.

"Dare to ask Brother Fang, what are these things? Please also explain. ”

Fang Yizhi said with a smile: "What I just demonstrated is a wired telegraph, which can transmit messages to distant places through the line. ”

Zhu Youzhen and Zhu Yujian both nodded, they already understood this.

Fang Yizhi continued: "These are the knowledge taught by Mr., and it is also the simplest application of electromagnetism, the drawings that Mr. just left, this is to illustrate a wireless message transmission scheme, once the research and development is successful, it will not be bound by copper wires, not only to save a huge amount of line consumption, but also to transmit messages conveniently!" ”

Zhu Youzhen and the others were stunned.

Deliver messages wirelessly, it's no different from supernatural powers!