"Xiao Xuan, how did you torture Wei Wang to this extent? If His Majesty knew about this, he would not let you off so easily! "
In the workshop of Strange Interest Pavilion, Li Zexuan was pulled aside by Cheng Yaojin after he had helped Li Tai solve his problem.
"This … Uncle Cheng, why do you say that? How did I torture Qing Que? "
Li Zexuan was stunned when he heard this.
Cheng Yaojin thought that Li Zexuan was too embarrassed to admit it. He pursed his lips and said, "Hey! This is not considered torture? When have I not seen Wei Wang in a clean, dignified, and dignified manner? Look at him now, how is he any different from the ordinary craftsmen in your workshop? If he did not speak up just now, I would not have recognized him! In the words of the literati, he is now unkempt and unkempt! "
In order to prove that Li Tai was indeed being tortured, Cheng Yaojin racked his brains and used a few idioms. Unfortunately, he still used them incorrectly!
Li Zexuan was speechless when he heard this. He paused for a moment and said, "Uncle Cheng, Qing Que is participating in a research project of the academy. It has been hard on him recently, but he is willing to do all this. How can you say that I am torturing him?"
"Research project? What research project? Oh, right! Chou Niu did not come home last weekend. Your aunt has been nagging for a long time! Could it be that he is also participating in this research project? "
Cheng Yaojin's eyes lit up when he heard this. He immediately thought of his son and asked hurriedly.
"Er …"
Li Zexuan was speechless. Cheng Yaojin really thought highly of his son. With Cheng Chumo's results and his restless personality, how could Li Zexuan arrange for him to do research? However, Cheng Chumo was still recuperating in the medical hall. If he told the truth, that kid would probably be beaten up again. After thinking for a while, Li Zexuan could only say vaguely.
"You can say that! However, the recent research projects carried out by the academy are classified as top secret. No one involved is allowed to reveal anything to anyone outside of the project. This is a rigid rule, and I can't make an exception. I hope Uncle Cheng can forgive me! "
"Top secret? What kind of project is so mysterious? "
When Cheng Yaojin heard this, he became even more interested. Old Cheng was completely convinced by Li Zexuan's ability to create new things. For example, the variable speed disc brake bicycle that he loved so much that he couldn't put it down. Therefore, a project that could make Li Zexuan take it so seriously must be a good project, so he asked somewhat unwillingly,
"Little Xuan, can't you tell this old man a little? Your Uncle Cheng isn't an outsider, so he won't tell anyone. Besides, you're the Yamachō of Yanhuang College. Aren't you the one who sets the rules? Why are you so serious? "
Li Zexuan said helplessly, "Uncle Cheng, it's precisely because I'm the Yamachō of Yanhuang College that I have to set an example. If I don't follow the rules, how can I expect the others in the academy to follow the rules? Therefore, I really can't tell you about this matter! Don't worry, this research project is definitely beneficial to the Tang Empire! "
"No! Isn't that equivalent to not saying anything? "
Old Cheng muttered, but he also knew that it was impossible to get the truth out of Li Zexuan, so he didn't continue to ask. Seeing the brand-new bicycle in his hand, Old Cheng's spirits rose again. He laughed and said,
"Haha! Then Little Xuan, you go ahead! This old man will go back to Chang 'an first! I don't want that old bicycle anymore. This one is enough! Haha! "
It turned out that Old Cheng was a person who liked the new and hated the old. This old guy rode the variable speed bicycle and left the workshop like a gust of wind. The poor old bicycle he had ridden earlier could only lie quietly in a corner of the workshop and collect dust!
.....
After Cheng Yaojin left, Li Zexuan arranged for the remaining variable speed bicycles to be sent to the homes of Qin Qiong, Yuchi Jingde, Niu Jinda, and Li Jing. These families were the closest to him, so he definitely wouldn't forget about them if there were any good things. In addition, Li Zexuan also sent Liu Feng and Liu Yun to send three variable speed bicycles to the palace. They were for Li Er, Li Chengqian, and Changle respectively.
After Changle's Qi disease was cured, she was more lively than before. It was just right to give her a variable speed bicycle now!
"Qingque, I suddenly have an idea. Come and listen to it and see if it's feasible?"
After everything was arranged, Li Zexuan went to a courtyard in the deepest part of the workshop and found Li Tai, who was modifying a telegraph.
This courtyard was the secret research base of the academy's second and third trump card projects. Outside the courtyard, Li Zexuan's personal guards were guarding day and night. All personnel entering and leaving had to have their identities verified. It could be said that the security was very tight!
Currently, the participants of these two trump card projects were being recruited and screened. However, this didn't affect Li Tai, the deputy chief designer, in the slightest. In just a few days, Li Tai had already created simple electrical components such as resistors, capacitors, and inductors. In addition to the electronic diodes and triodes that the workshop had previously created, it could be said that the foundation of Tang's electronic industry was gradually taking shape!
"Oh? Yamachō, please speak! "
Li Tai, who was busy, immediately put down his work and looked up at Li Zexuan.
After "hanging out" with Li Zexuan for so long, Li Tai knew that Li Zexuan's every idea could change this era. He didn't dare to underestimate him!
Li Zexuan pondered for a moment and said, "Qingque, the telegraph we are making now transmits information through the conversion of electricity and electromagnetic waves. This kind of telegraph can be used in the military to plan strategies and predict the enemy's moves. However, in the future, if the common people have the need for ultra-long distance communication, the telegraph will be inconvenient!
Therefore, I am thinking that we might be able to create a device that can convert sound into electricity, and then convert electricity into sound. This way, we only need to connect a wire to achieve real-time sound transmission! "
This was actually a wired telephone. Li Zexuan had long wanted to make it, but in the past, Tang didn't have any industrial foundation and couldn't do it even if he wanted to. However, it was different now …
These words might sound like a fantasy to others, but Li Tai wasn't in a hurry to deny it. He pondered for a long time before opening his mouth to speak.
"Electricity and sound? Yamachō, your idea sounds good, but when we implement it, the first step is to solve the problem of how to convert electricity and sound, which are two completely different types of energy! "
Professional!
It had to be said that the current Li Tai was much more professional than before. He could see the essence of the problem at a glance.
Li Zexuan's eyes shone with praise. "Haha! Qingque, you are right! In order to achieve real-time long-distance sound transmission, the first problem is to solve the problem of converting electricity and sound! Although they are two different types of energy, it doesn't mean that they can't be converted to each other! For example, electricity and magnetism used to be different, but with Ink Girl's efforts, they can be converted to each other now, can't they? I have a preliminary idea here. I will tell you about it first, and you can think about it in private! "
"Yes, yes! Yamachō, please tell me! "
Li Tai nodded quickly. He didn't feel dejected at all because Li Zexuan wanted to increase his burden. He was a person who naturally pursued new interests and new technologies. Otherwise, he wouldn't have given up on being a free and unfettered lord and come to the workshop to suffer!
Li Zexuan picked up a pen and paper and wrote as he drew, "Actually, it's not difficult to convert electricity and sound, but we need a magnetic field to act as a medium! Qingque, look, we can use this cone-shaped paper basin at the front of the machine to collect sound. You have studied Physics, so you should know that sound is a sound wave produced by an object's vibration. Similarly, when the sound wave hits the paper basin, it will cause a small vibration on the surface of the paper basin.
At this time, if we attach a copper coil to the bottom of the paper basin, and then place the copper coil in a permanent magnetic field, when the front of the paper basin receives sound, it will cause the coil to vibrate. The coil will cut the magnetic line and produce a current corresponding to the frequency of the sound wave. We have completed the process of generating electricity from sound waves!
As for how to convert electricity into sound waves, this is also simple. We can attach an electric coil to the bottom of the paper basin and add a permanent magnetic field. When the current passes through the coil, the coil will produce a corresponding magnetic field. This magnetic field and the external permanent magnetic field will produce an interaction force. This force will cause the coil to vibrate with the sound current in the external permanent magnetic field. The diaphragm of the paper basin is connected to the coil, so the diaphragm will also vibrate.
Qingque, you should know that under the same voltage, the size of the magnetic field produced by the same electrified coil is proportional to the size of the current. Therefore, when the current passing through the coil is larger, the coil will move more violently in the magnetic field, and the sound it produces will be louder. Therefore, the vibration of the coil can produce a similar or identical sound wave to the original audio signal.
In this way, we can realize the conversion from sound to electric current, and from electric current to sound. As long as the wire is long enough and the electric power is strong enough, our sound can travel far enough! "
Li Tai was a little stunned. Faced with such an exquisite design, he was so excited that even his breathing became difficult. Perhaps this was what it meant to be suffocated by a dream!
After a long time, Li Tai finally recovered from the shock. He took a few deep breaths, and then looked at Li Zexuan as if he were looking at a monster. He opened his mouth, but no words came out for a long time!
"Shan … Yamachō, this design is too exquisite! It is a wonderful work of art. It is amazing! "
After his mouth trembled for a long time, Li Tai finally said, "If it can really be done, then there will be no need for a telegraph machine in the future! Yamachō, why don't we just start researching this kind of machine that can transmit sound from a thousand miles away and give up on improving the telegraph machine? What do you think? "
Li Zexuan quickly waved his hand and said, "No! Qingque, what I told you just now was just my idea. There is still a long way to go from idea to product. Even if you can make it, it will take a long time to debug the audio in the later stages. The improvement plan for the telegraph machine has been deliberated countless times, and now it is completely natural. We must not give up what is near at hand for what is far away!
Moreover, compared to this kind of device that can transmit sound from a thousand miles away, the telegraph machine is not completely useless. Especially for military communications, the telegraph machine has better confidentiality. Even if the enemy seizes our telegraph machine, it will be useless if they don't have a password book! In addition, the telegraph machine does not need wires to send and receive telegrams. It is most convenient during war! So, no matter what, we must improve the telegraph machine first! "
Hearing Li Zexuan's words, Li Tai also woke up from his excitement. He nodded and said, "Yes! I understand! "
However, he couldn't help but feel disappointed. He knew that there was a more advanced thing, but he didn't have the time to make it. This feeling really made Li Tai feel very uncomfortable!
Li Zexuan saw this and smiled. He patted Li Tai's shoulder and said, "Although we don't have the energy to make a machine that can transmit sound over a long distance, we can first make a simple sound to electricity conversion device. It shouldn't take too long!"
"Oh? Yamachō, what do you mean? "
Li Tai's eyes lit up as he quickly said.
Li Zexuan smiled and said, "I just want to make a small thing. Qingque, help me make it! This thing uses a paper basin diaphragm to convert a person's voice into an electric current. Then, it uses a transistor to amplify the current. The amplified current flows through a coil, and through the magnetic field, it vibrates more violently. This way, the sound transmitted will be even louder! I call this thing a loudspeaker or a loudspeaker. Compared to those long-distance sound transmission machines, this thing is much simpler. If you have the time, try to make one first! "
Li Tai thought about it in his mind and then said excitedly, "This is a good idea! The loudspeaker is simple to make, but the principle is similar to those long-distance sound transmission machines. If we can make this thing, we will have more confidence in making long-distance sound transmission machines in the future! "
Li Zexuan nodded and said, "That is the reason!"
After that, he looked at the shadows of the trees outside the house and said, "Okay! Then that's it for now. Qingque, you continue with your work. I will leave first! "
Li Tai quickly bowed and said, "Yamachō, take care!"
After this incident, he admired Li Zexuan even more. It was like looking up to a high mountain. Although he could not reach it, he yearned for it!
.....
"Your Majesty, His Highness the Crown Prince requests an audience!"
Around five in the afternoon, in the Sweet Dew Hall of the palace.
Li Er, who had been reading memorials for a while and was nodding off, was suddenly awakened by a sharp voice. Who else could it be but Zhao Song? Speaking of which, only Zhao Song dared to come and report at such a "special" moment.
"Oh? Chengqian is here? Let him in! "
Li Er rubbed his sleepy face and forced himself to wake up.
"Yes, sir!"
Zhao Song received the order and left. At the same time, he could not help but heave a sigh of relief.
After a while, Li Chengqian came in. Moreover, he did not come in alone. Beside him … was pushing a bicycle!
Seeing this, Old Li immediately lost his sleepiness. Without waiting for Li Chengqian to bow, he said, "Chengqian, why did you push a bicycle in? Hmm? That's not right! There's something strange about this bicycle … "
.....
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