The next day, good news came from the workshop. The triode was made, and Li Tai used a very rough ammeter to verify that it could indeed amplify current. After hearing the news, Li Zexuan rushed to the workshop immediately. .
"Chief Shan, it's done! It's really done! After my preliminary measurement, after the current passes through the gate of the triode, it is amplified by almost five times! If more triodes are connected, the amplification factor can be even greater!"
As soon as he entered the laboratory, Li Tai came forward with excitement on his face.
Li Zexuan walked to the test bench and saw a glass cylinder slightly smaller than his fist and a rough meter on the table. The meter didn't even have a casing, and the magnets, springs, wires, and pointers inside were all exposed. Some simple fixtures. Although Li Zexuan could roughly guess the function of this instrument, the appearance of this thing was really unflattering!
As for the glass tube that is slightly smaller than the fist, it should be the first triode in the world, because there are three electrode connectors exposed on the outside of the glass tube, but... this triode is too big. The triodes used by Li Zexuan in his previous life were all semiconductors. (Crystal) triodes are only the size of a fingernail, and with the development of microelectronics technology, the size of some crystal triodes can even be less than 10nm. Compared with this, the electronic triode in front of you is not an exaggeration to call it a giant!
"Qingque, please connect the phone and let me take a look!"
Li Zexuan knew that now was not the time to be picky. After all, under the current conditions, it was already difficult for Li Tai to make a triode. It would be a bit embarrassing to ask for anything else. So, he pointed to the triode on the table and said to Li Zexuan. Tai said.
"Okay! Chief Shan, wait a moment!"
Li Tai nodded in response, and then started to connect the wires with his hands and feet. After a while, he turned on the power switch, pointed at the meter, and said:
"Mr. Shan, look, the current at the cathode terminal is 0.7. Now I connect the ammeter to the anode terminal... Look, the current has reached 3.8, which is almost an amplification factor of about five times! This proves that the voltage on the gate is weak. The signal changes, and the current flowing from the cathode to the anode can be modulated, so you can get the same current as the input signal changes, but with a greatly increased intensity!"
Li Zexuan saw this series of operations. At this time, he couldn't help stroking his hands and sighing: "Okay! Okay! Okay! I didn't expect Qingque that you could make a triode so quickly. It's not easy! Now there are Once the diodes and transistors are produced, and resistors with stable resistance values are made, the academy can begin the work of transforming the telegraph machine!"
Li Tai thought for a while and asked: "Shan Zhang, the workshop has already made the standard resistor you mentioned before, but I think it is too big. If a larger resistance is needed in the future, The resistance will be larger, and if used in circuits, it will seriously affect the size of the entire product. I wonder if there are any materials that can replace steel as resistors?"
In order to make it easier for Li Tai to make a voltmeter, Li Zexuan proposed to make a steel with one inch in length, width and height to be used as a standard resistor. However, although the conductivity of steel is not as good as copper, it is still good. The resistance of iron wire is very small, so it is not suitable to be used as a resistor. Most modern resistors are made of nickel-chromium alloy. SMD resistors are a mixture of metal powder and glass uranium powder, which is printed on the substrate using screen printing. Made of resistors.
Considering the current process conditions, it is difficult to make these two kinds of resistors. After thinking for a long time, Li Zexuan said:
"Of course there are materials that can replace steel! Qingque, you can mix carbon black, resin, and clay in a certain proportion, then press the mixture, and then undergo heat treatment to make sections of resistance rods. The resistance made of this material is better than chopsticks. It is thin, only about a quarter of an inch long, but the range of resistance values can be very wide, which can fully meet the needs of various occasions!"
The resistor he was talking about is called a carbon resistor in modern times, and a color circle is used on the resistor to indicate its resistance. Its materials are cheap, low cost, and have a wide resistance range, but its performance is poor and rarely used. It is basically replaced by metal film resistors and chip resistors with more stable performance in the market.
But for the current Datang Dynasty, it is quite amazing to have carbon resistors!
"Carbon black, resin, clay? Chief Shan, can the resistor made of these things be used?"
Li Tai was stunned for a while after hearing this. He used carbon black, resin, and clay to make resistors. No matter how it sounded, it seemed unreliable!
Li Zexuan smiled slightly and said: "Why can't this be used? Not only can it be used, but it is also very easy to use! If you don't believe it, Qingque, please find a craftsman in the workshop later to help you try to make a batch of these resistors. You’ll find out when you come out!”
Li Tai scratched his head and said, "Okay! Then I'll find someone to try it out later!"
Li Zexuan nodded and said: "Yes! Then this matter is settled! This afternoon, I will officially announce the launch of the second and third trump card projects in the academy, and you, Qingque, will also attend the meeting!"
"Ah? Chief, what can I do if I go to such a meeting? If I don't go, I have a lot of things to do here!"
When Li Tai heard this, he quickly shook his head.
When it comes to major projects such as the killer project, they are basically led by the college's gentlemen, and the students only play a supporting role. Li Tai feels that it is better for him not to participate in such meetings, which are a bit of a waste of time!
Unexpectedly, Li Zexuan still insisted: "Qingque, you must go to this meeting this afternoon. After all, you are indispensable for these two killer projects!"
After that, he left without waiting for Li Tai to react.
"You can't do without me? What does this mean, Chief?"
Li Tai's eyes showed confusion. Gradually, he suddenly thought of something and couldn't help but feel a little excited in his heart.
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"Today I have summoned all the gentlemen to this meeting, mainly because I have something important to announce!"
Not three minutes later, all the teachers of the academy were summoned to the large conference room on the first floor of Guanghua Building. As for the students of the academy, the first two periods in the afternoon were naturally temporarily changed to self-study. Anyway, it was approaching the end of the semester, and each class was basically After all the lectures, students just need time to review. Seeing all the teachers coming, Li Zexuan said in a deep voice.
Seeing that Li Zexuan was so solemn, everyone couldn't help but raise their spirits and wait for the next step.
Just listen to Li Zexuan say: "The gentlemen here have all passed the academy's confidentiality examination and signed a confidentiality agreement. Today's meeting is a top-secret meeting. The minutes of the meeting are directly classified as top-secret documents. After the meeting, Mr. Yan will send someone to archive and lock Save, and what you hear in a moment is not allowed to be leaked to others, including your family members. Anyone who violates this will be punished by Dali Temple for treason. I hope you can take it seriously!"
Hearing this, everyone's faces couldn't help but become serious. Since the academy established a strict confidentiality system, there has never been a top-secret incident. You must know that top-secret technologies are all related to national security. With life and death at stake, no document would easily be defined as top secret, but this also shows the high standard and important content of today's meeting!
Everyone raised their hands with serious faces and said, "Yes! Chief! We will strictly abide by the academy's confidentiality system and will never leak the contents of today's meeting!"
"Okay! Now let's officially start the meeting!"
Li Zexuan nodded and said in a deep voice: "I have called you all here today to inform you that from today on, the second and third trump projects of Yanhuang Academy will be officially launched. Yes, you heard it right, they are two trump cards. The project will be approved at the same time!”
The academy gentlemen present felt incredible. At the beginning of the year, Li Zexuan proposed a plan for one hundred killer projects of Yanhuang Academy, and took the Bahe Hydropower Station as the first killer project. Until now, this first killer project has not been fully completed. Because the later work of the hydropower station has not been completed, but now Li Zexuan has directly proposed two killer projects. In the eyes of everyone, the progress is really too fast!
And at the beginning of the meeting, Li Zexuan defined these two killer projects as top-secret projects. Such high standards made the gentlemen of the academy feel a sense of solemnity!
"Chief Shan, what are the contents of the second and third killer projects? Will it be too stressful to carry them out at the same time?"
Mo Huai couldn't help but asked.
Everyone else also turned their attention to Li Zexuan.
Li Zexuan replied: "Of course there is pressure, but it must be overcome. I have good reasons for choosing to launch two killer projects at the same time. Let me talk about the specific tasks of these two projects!
The second trump card project is to improve the current telegraph machine. First, it is to add a signal amplification circuit to the telegraph machine to increase the transmission power of the telegraph machine; second, it is to install a detector for the telegraph machine to identify useful information in electromagnetic waves. , Enhance the signal recognition ability and anti-interference ability of telegraph machines; third, build telegraph relay stations in key states and counties to serve as transmitting and receiving relays for electromagnetic waves, further increasing the communication distance of telegraph machines!
The ultimate goal of this killer project is to increase the effective communication distance of the telegraph machine to more than a thousand miles, or even further! The key electronic components required for this project have been prepared in the workshop. Those involved in the project can go to the workshop for details later! "
"The communication distance is one thousand meters!"
Hearing this indicator, everyone present could not help but gasp. Thousands of miles of sound transmission, this is really equivalent to a thousand miles of sound transmission! If this had been done in the past, if they heard this, they would definitely sneer at it, but in the past year at Yanhuang Academy, they have seen too many incredible things, so even if the gentlemen find it incredible at the moment, no one Refute it verbally!
Seeing the incredulous expressions on everyone's faces, Li Zexuan smiled and said: "Although this sounds a bit unbelievable, you have been in the academy for so long and have a certain understanding of engineering, especially the gentlemen in the physics group. You should know that, The goal I just mentioned is not completely impossible to achieve, right?"
All the physics teachers around Mo Huai were hesitant and had expressions of excitement on their faces.
Mo Huai cupped his hands and said: "What Chief Shan just said is not completely impossible. The key to the question is, does the workshop now have devices that can perform power amplification and electromagnetic wave detection? If so, then there is a communication distance of a thousand miles. It’s possible!”
Li Zexuan heard the words and said with a smile: "Don't worry, Mr. Mo. Everything is basically ready now, we just need the east wind! Now let me talk about the third trump card project! From now on, the college will set up a measurement standards committee, and I will take charge of it. The president, Mr. Xu Hongzhi, Mo Huai, and Wang Ji serve as vice presidents. The purpose of establishing the Measurement Standards Committee is to formulate measurement units and measurement standards for some new physical quantities, such as current, voltage, resistance, etc.!
For this third killer project, we must first formulate measurement units and measurement standards for the three physical quantities of current, voltage, and resistance, and make measuring instruments. In addition, I plan to reformulate the units of length, from small to large, as millimeters, centimeters, decimeters, meters, and kilometers. Among them, 3.07 meters is equivalent to one foot today.
One meter is equal to ten meters, one hundred centimeters, and one thousand millimeters. According to this conversion relationship, the academy needs to make new measuring rulers. In the future, all projects in the academy will use this new measuring ruler. Measurement unit, which is conducive to more precise production!
The reason why the two killer projects need to be established and carried out at the same time is mainly because there are many cross-links between the two projects, which can promote and promote each other! "
(According to literature, one zhang in the Tang Dynasty was approximately equal to 3.07 meters)
As soon as he finished speaking, there was a faint "buzzing" sound in the conference room.
Li Zexuan just wants to establish units and measurement standards for new physical quantities. He actually wants to change the unit of length that has been deeply ingrained in everyone's minds. This is a bit difficult to adapt to!
But the reason given by Li Zexuan is too strong, because the new units are indeed more precise than the previous inches, feet, and feet, and are more conducive to precision processing and precision production.
"Haha! I know that you may not be able to accept the new measurement unit for a while, but in the future when you participate in precision manufacturing projects, you will know the benefits of this new measurement unit!"
Seeing the unacceptable expressions on everyone's faces, Li Zexuan smiled and enlightened, and then said in a deep voice:
"Next, I announce the personnel appointments for these two killer projects! Mr. Mo Huai is appointed as the chief designer of these two killer projects, and Li Tai, Mo Chui, and Xu Hongzhi are the chief designers. Several of them should be transferred to the academy as soon as possible. Students and teachers with outstanding achievements in arithmetic and physics should join these two killer projects! The deadline for these two tasks is four months, and within four months, the set goals must be achieved!"
A stone made a thousand waves. As soon as these words came out, everyone was stunned. At this time, the gentlemen of the academy noticed that Li Tai had been standing behind Li Zexuan and asked a student to be the deputy chief engineer of the killer project, Li Zexuan. Are you crazy?
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