Huang Xiao smiled and said to Zhu Yujian and the others: "Your Majesty, Prince Xin, you should also go and have a look."
Zhu Yujian cupped his hands and said, "Thank you so much, King Xian."
The group of people followed Fang Yizhi and others 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 and this is the receiver. The power supply I use is the power supply of the sun lamp in the classroom, and it is also equipped with a hand-operated power generator. Let’s demonstrate the manual transmission first.”
Huang Xiao nodded and walked forward to take a closer look.
"Try it."
Zuo Maodi walked out and sat on the seat of the transmitter, while another student stepped forward and held the handle of the generator.
Fang Yizhi sat on the receiver's seat, with an assistant beside him.
Zuo Maodi said: "Sir, I just want to say, long live the Ming Dynasty!"
Huang Xiao nodded.
Two students turned on the generator.
Zuo Maodi started sending the report with full concentration.
Zhu Youjian and others looked confused and didn't know why, but it was not easy to bother asking at this moment.
I could only watch silently.
Suddenly, the three of them saw Fang Yizhi's strange-looking machine, which began to move, driving a strange pen to draw rhythmic lines on the paper.
The three of them were very curious and really didn't understand what this meant.
Soon, Zuo Maodi stopped sending the report.
Fang Yizhi also took out a large piece of paper and spread it on the table.
Huang Xiao and others walked forward.
Fang Yizhi explained: "Sir, this is the pattern of the letters we recorded, which can be translated according to the pattern. You see, this is D...A...mi
g...wa
Sui. "
Huang Xiao looked at it and said with a smile: "However, they are exactly the same, both sending and receiving are accurate!"
Zhu Yujian suddenly realized it and lost his voice: "This is a message! It's amazing!"
Zhu Youjian also understood and looked at Fang Yizhi, Zuo Maodi and others with admiration in his eyes!
Fang Yizhi sighed and said: "Hand-cranked generators are really inconvenient, especially for receivers. Someone has to shake the handle all the time, otherwise the telegram may be missed. Secondly, these codes are too Simple, without any confidentiality, and extremely easy to be cracked by the enemy.
In addition, if the line is too long, the signal will become weak, and the information may not be transmitted. Moreover, the copper wire is too expensive, and after being wrapped with Eucommia gum, the cost is even higher. If it is damaged, it will be useless. ! "
Huang Xiao nodded and said with a smile: "Yes, you are right. Cable telegraphy does have some disadvantages. Have you thought of any solutions?"
Fang Yizhi said: "The students dismantled a solar lamp on their own initiative and found an object in it, which should be a machine for storing electricity. The students wanted to set up another special class to study the storage of electricity, so that the telegraph machine can be made practical. Sexuality is greatly improved!”
Huang Xiao smiled and said: "It doesn't matter, you can dismantle it casually. Your idea is right. There is indeed a battery in the solar lamp. The electricity converted from sunlight is continuously injected into it. After being stored, it can be used at night or when the sun is not strong. Sometimes, you can also use the stored power for lighting!”
Zuo Maodi said: "Mr. Song had previously planned to test hydropower in the Chaobai River, but later he stopped because of too many things. The students thought that we could go hand in hand, and hydropower could also be tested simultaneously. We could build a small facility and accumulate accumulated data. experience."
Huang Xiao nodded.
Fang Yizhi continued: "Student, I have some conjectures about the telegraph. Since the current can restore the sound, can I take a unique sound and encode it to keep it confidential? In this way, the level of confidentiality will definitely be better than today's. Be strong!”
Huang Xiao was immediately impressed by the other party's wisdom. Morse code was not developed until 200 years later in 1837. Fang Yizhi's idea just now, with further improvements, became the originator of Morse code. From now on, it should be called Fang Yizhi. Get the code!
"Yes! This idea is correct! And it is also a promising idea! Fang Yizhi, if you can develop such a set of codes, it will definitely go down in history, and I think this plan should be named Fang's Telegraphic code!"
Fang Yizhi was greatly inspired!
"Students must give their best!"
He continued: "Sir, for the sake of time, we only tested the receiver of the telephone. What I just thought was that during the test, I found that after the receiver is connected to the signal of the transmitter, it will send out a signal. The regular sounds, the inspiration, the students will demonstrate it to you.”
"Okay!" Huang Xiao followed suit.
Two students assisted Fang Yizhi in moving the handset device to the table and connecting the line.
Zuo Maodi reported again.
Sure enough, I heard a rhythmic ticking sound coming from the receiver.
Zhu Youjian was shocked again.
Huang Xiao couldn't help but think of the ticking sound in spy movies, and it suddenly felt very familiar. He laughed: "Not bad! This sound is really beautiful!"
"Bring me a pen and paper, and I'll give you a rough outline of the direction of improvement."
Fang Yizhi was overjoyed and quickly took out a pen and paper.
Huang Xiao made simple hand-drawn drawings of what he knew about the principles of transmitters and receivers, the working principles of dry batteries, and wireless technology.
Just looking at Fang Yizhi, he was astonished as if he could see the sun through the clouds.
"Keep up the good work, and I hope you will come up with practical results as soon as possible! In a few days, various armies will set off one after another. After wiping out the country and surrounding areas, they will go on an overseas expedition. In this magnificent process, I hope that you will A researched telegraph machine can be a help!”
Fang Yizhi, Zuo Maodi and all the students all looked solemn and stood up to respond loudly!
With the intelligence of Fang Yizhi and others, Huang Xiao believes that as long as they are given time, their research will be successful!
But as Huang Xiao said, the army that was about to leave needed communication means, and he had to give instructions again. This was also the purpose of his coming.
As for the purchase of wireless equipment such as walkie-talkies, Huang Xiao thought about it but did not implement it. Once the modern equipment is brought to the soldiers of the Ming Dynasty and they get used to it, the backward radio waves studied by Fang Yizhi and others will surely be eclipsed and will also be replaced. Seriously dampen their enthusiasm for scientific research.
That’s not worth the gain. After all, if you want to be far ahead, you still have to rely on your own efforts!
He got up and left.
Everyone sent it out.
Turn back.
Zhu Youjian couldn't hold himself back and saluted Fang Yizhi, Zuo Maodi and others, and apologized again in public for his previous rudeness.
Fang Yizhi, even Zuo Maodi and other students were all teenagers. When they saw Zhu Youjian's sincere apology, they all smiled.
"I dare to ask Brother Fang, what are these? Please clarify."
Fang Yizhi smiled and said: "What I just demonstrated is a wired telegraph, which can transmit messages to distant places through lines."
Zhu Youjian and Zhu Yujian both nodded, they already understood this.
Fang Yizhi continued: "These are the knowledge taught by Mr., and they are also the simplest electromagnetic applications. The drawings Mr. just left are illustrating a wireless message transmission scheme. Once successfully developed, it will not be affected by copper." The restraint of wires not only saves a huge amount of wire consumption, but also makes message transmission more convenient!"
Zhu Youjian and Zhu Youjian were stunned.
Transmitting messages wirelessly is no different from magical power!
