The next day, a piece of good news came from the workshop. The transistor was completed, and Li Tai used a very crude ammeter to verify that it could indeed amplify the current. Li Zexuan heard the news and immediately rushed to the workshop.
"Yamachō, it's done! It's really done! According to my preliminary measurements, after the current passes through the transistor's grid, it's amplified by about five times! If we connect a few more transistors, the amplification can be even greater! "
As soon as he walked into the laboratory, Li Tai greeted him with a face full of excitement.
Li Zexuan walked to the test bench and saw a glass tube slightly smaller than a fist and a crude instrument. The instrument didn't even have a casing, and the magnets, springs, wires, and pointers were all exposed. There were only a few simple fixtures. Although Li Zexuan could roughly guess the function of the instrument, the appearance of this thing was really not flattering!
As for the glass tube that was slightly smaller than a fist, it should be the world's first transistor, because the glass tube had three electrode connectors exposed outside. However … this transistor was too big. The transistors that Li Zexuan used in his previous life were all semiconductor (crystal) transistors, which were only the size of a fingernail. With the development of microelectronics, some crystal transistors could even be smaller than 10 nm in size. In comparison, the electronic transistor in front of him could be called a giant!
"Qingque, connect it to the electricity for me to see!"
Li Zexuan knew that now was not the time to be picky. After all, under the current conditions, Li Tai was already not easy to make a transistor. It would be a bit difficult to ask for more, so he pointed to the transistor on the table and said to Li Tai.
"Okay! Yamachō, wait a moment! "
Li Tai nodded in response and quickly started to connect the wires. After a while, he turned on the power switch and pointed to the ammeter.
"Yamachō, look, the current at the cathode end is 0.7. Now I connect the ammeter to the anode end … Look, the current is 3.8, which is about five times amplification! This proves that the weak signal change on the grid can modulate the current from the cathode to the anode. Therefore, we can get the same current change as the input signal, but the intensity is greatly increased! "
Li Zexuan saw this series of operations and couldn't help but clap his hands and sigh. "Good! Good! Good! Qingque, I didn't expect you to be able to make a transistor so quickly. It's not easy! Now that we have a transistor, a transistor, and a resistor with a stable resistance value, the Academy can start the work of modifying the telegraph! "
Li Tai thought for a while and asked, "Mountain Leader, the factory has already made the resistor that you mentioned before. However, I feel that its volume is too big. If we need a bigger resistor in the future, its volume will be even bigger. If it is used in the circuit, it will seriously affect the volume of the entire product. Is there any material that can replace steel as a resistor?"
Previously, in order to make it easier for Li Tai to make the voltmeter, Li Zexuan proposed to make a standard resistor with a length, width, and height of one inch of steel. However, although the conductivity of steel was not as good as copper, it was still good. The resistance of a piece of iron wire was very small, so it was not suitable to use it as a resistor. Modern resistors were mostly made of nickel-chromium alloy, while SMD resistors were made of metal powder and glass uranium powder mixed together and printed on a substrate by screen printing.
With the current technology, it would be difficult to make these two resistors. After thinking for a long time, Li Zexuan said, "Yes.
"Of course there are materials that can replace steel! Qingque, you can mix carbon black, resin, and clay according to a certain ratio, press the mixture, and then heat treat it to make a resistor rod. The resistors made of this material are thinner than chopsticks, only about a quarter of an inch long, but the range of resistance value can be very wide. It can completely meet the needs of any situation! "
The resistor he was talking about was called a carbon resistor in modern times, and its resistance value was represented by a color ring. Its material was cheap, its cost was low, and its resistance value was wide, but its performance was poor, so it was rarely used. In the market, it was replaced by more stable metal film resistors and SMD resistors.
But for the current Tang Empire, it was already quite amazing to have carbon resistors!
"Carbon black, resin, and clay? Yamachō, can the resistors made of these materials be used? "
Li Tai was stunned. Carbon black, resin, and clay as resistors, no matter how he looked at it, it did not sound reliable!
Li Zexuan smiled and said, "Why can't they be used? Not only can they be used, but they are also very useful! If you don't believe me, Qingque, you can find a craftsman in the workshop later to try and make a batch of resistors like this for you! "
Li Tai scratched his head and said, "Okay! Then I will find someone to try and make one later! "
Li Zexuan nodded and said, "Mm! Then this matter is settled! This afternoon, I will officially announce the start of the second and third trump card projects at the academy. Qingque, you will also attend the meeting! "
"Ah? Yamachō, what can I do at this kind of meeting? I'm not going, I still have a lot of things to do here! "
Li Tai heard and quickly shook his head.
When it came to important projects like the trump card projects, the teachers of the academy were basically in charge. The students only played the role of assistant. Li Tai felt that it was better for him not to attend this kind of meeting. It was a waste of time!
However, Li Zexuan still insisted, "Qingque, you have to attend this afternoon's meeting. After all, the next two trump card projects can't be done without you!"
After that, he did not wait for Li Tai to respond and directly left.
"Can't be done without me? Yamachō, what do you mean by that? "
Li Tai was puzzled. Gradually, he suddenly thought of something and could not help but feel a little excited.
…
"Today, I have called all the teachers for this meeting mainly because I have something important to announce!"
At three in the afternoon, all the teachers of the academy were called to the big meeting room on the first floor of the Guanghua Building. As for the students, the first two classes in the afternoon were naturally changed to self-study. Anyway, it was near the end of the semester and all the classes were basically finished. The students just needed time to review. Seeing that all the teachers were here, Li Zexuan said in a deep voice.
Seeing that Li Zexuan was so serious, everyone could not help but raise their spirits and wait for him to continue.
Li Zexuan said, "All the gentlemen present here have passed the Academy's confidentiality exam and signed confidentiality agreements. Today's meeting is a top-secret meeting, and the minutes of the meeting will be classified as top-secret documents. After the meeting, Mr. Yan will send someone to file and lock it. What's more, what you hear later is not allowed to be leaked to others, including your family members. Violators will be charged with treason and handed to the Supreme Judiciary for punishment. I hope you can treat it seriously!"
Hearing this, everyone could not help but become serious. Ever since the Academy established a strict confidentiality system, there had never been a top-secret incident. One must know that top-secret technology was related to the safety and survival of the country. It was not easy to define a document as top-secret. However, it also showed the high standard of today's meeting and the importance of the content!
Everyone cupped their hands and said solemnly, "Yes! Yamachō! We will strictly abide by the confidentiality system of the Academy and will not leak the content of today's meeting! "
"Good! Now let's officially start the meeting! "
Li Zexuan nodded and said in a deep voice, "Today, I called everyone here to inform you that from today onwards, Yanhuang College's second and third trump card projects will be officially launched. Yes, you didn't hear wrong. Two trump card projects will be launched at the same time!"
All the Academy teachers present felt that it was incredible. At the beginning of the year, Li Zexuan proposed a hundred trump card projects for Yanhuang College, and the Bahe Hydropower Station was the first trump card project. Until now, the first trump card project had not been completed, because the later work of the hydropower station had not been completed. However, now Li Zexuan directly proposed two more trump card projects. In everyone's eyes, the progress was too fast!
Moreover, at the beginning of the meeting, Li Zexuan defined these two trump card projects as top-secret projects. This kind of high standard made the Academy teachers feel a sense of seriousness!
"Yamachō, what are the contents of the second and third trump card projects? Will it be too much pressure to launch them at the same time? "
Mo Huai couldn't help but ask.
Everyone else also looked at Li Zexuan.
Li Zexuan replied, "Of course there will be pressure, but it must be overcome. The reason why I chose to launch two trump card projects at the same time is because I have sufficient reasons. Now, let me talk about the specific tasks of these two projects!
The second trump card project is to improve the current telegraph. First, we need to add signal amplification circuits to the telegraph to increase the transmission power of the telegraph. Second, we need to install detectors for the telegraph to identify useful information in the electromagnetic waves and enhance the telegraph's signal recognition ability and anti-interference ability. Third, we need to build telegraph relay stations in key states and counties to be used as transmission and reception relays of electromagnetic waves, further increasing the telegraph's communication range!
The ultimate goal of this trump card project is to increase the telegraph's effective communication range to more than 1,000 miles, or even further! The workshop has already prepared the key electronic components needed for this project. Those who are involved in the project can go to the workshop later to understand the details! "
"The communication range is 1,000 meters!"
Hearing this, everyone present couldn't help but gasp. A thousand-mile telepathic transmission. This was really equivalent to a thousand-mile telepathic transmission! If this had happened in the past, they would have scoffed if they had heard this. However, in the past year at Yanhuang Academy, they had seen too many incredible things. Therefore, even if the teachers felt that it was inconceivable, no one refuted it!
Seeing everyone's incredulous expressions, Li Zexuan smiled and said, "Although this sounds incredible, everyone has been at the academy for so long. You all have a certain understanding of engineering, especially those in the physics group. You should know that the goal I mentioned just now is not completely impossible, right?"
The group of physics students around Mo Huai all showed hesitation in their eyes, and their expressions showed that they were tempted.
Mo Huai cupped his hands and said, "What Yamachō said just now is not completely impossible. The key question is, does the workshop have devices that can amplify power and detect electromagnetic waves? If there is, then the thousand-mile communication range can be achieved! "
Li Zexuan smiled and said, "Mr. Mo, you can rest assured. Now, everything is ready. We only need one thing! Now, let me talk about the third trump card project! From today onwards, the academy will establish a Standards of Measurement Committee. I will be the chairman, and Mr. Xu Hongzhi, Mr. Mo Huai, and Mr. Wang Ji will be the vice-chairmen. The purpose of establishing the Standards of Measurement Committee is to establish measurement units and standards for some new physical quantities, such as current, voltage, resistance, and so on!
For the third trump card project, first of all, we need to establish measurement units and 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, they are millimeters, centimeters, decimeters, meters, and kilometers. Among them, 3.07 meters is equivalent to one zhang.
One meter is equivalent to ten meters, one hundred centimeters, and one thousand millimeters. According to this conversion relationship, the academy needs to make new measuring tools. In the future, all the projects of the academy will use this new unit of measurement. This will be conducive to more precise production!
The reason why we need to establish and carry out these two trump card projects at the same time is mainly because there are many cross-links between these two projects, which can play a role in promoting and promoting each other! "
(According to historical records, one zhang in the Tang Dynasty was equivalent to 3.07 meters.)
As soon as he finished speaking, there was a faint buzz of discussion in the conference room.
Li Zexuan wanted to establish units and standards for the new physical quantities, but he also wanted to change the unit of length that had been deeply ingrained in everyone's minds. This was a bit difficult to adapt to!
However, Li Zexuan's reason was too strong, because the new unit was indeed more precise than the previous inch, foot, and zhang. It was also more conducive to precision processing and precision production.
"Haha! I know that you may not be able to accept the new unit of measurement for a while, but when you participate in the precision manufacturing project in the future, you will know the benefits of this new unit of measurement! "
Seeing the difficult expressions on everyone's faces, Li Zexuan smiled and comforted them. Then, he said in a deep voice:
"Next, I will announce the personnel appointments for these two trump card projects! I will appoint Mr. Mo Huai as the chief designer of these two trump card projects, and Li Tai, Mo Chui, and Xu Hongzhi as the deputy chief designers. The few of you must quickly select the outstanding students and teachers in the academy who have outstanding results in mathematics and physics to join these two trump card projects as soon as possible! The deadline for these two tasks is half a year. Within half a year, the set goals must be achieved! "
Like a stone that raised a thousand ripples, everyone was stunned. At this time, the teachers of the Academy noticed that Li Tai had been standing behind Li Zexuan all this time. Was Li Zexuan crazy to let a student be the vice president of the trump card project?
…
You've already exceeded your reading limit for today. If you want to read more, please log in.
Login
Select text and click 'Report' to let us know about any bad translation.
