On the second day, there was good news from the workshop, the transistor was made, and Li Tai used a very rough ammeter to verify that it did have the effect of amplifying the current, Li Zexuan heard the news and immediately rushed to the workshop.

"Mountain chief, it's done! It really happened! After my initial measurements, the current passed through the gate of the triode and was magnified by about five times! If you connect a few more transistors, the magnification can be even greater! ”

As soon as he walked into the laboratory, Li Tai greeted him excitedly.

Li Zexuan walked to the front of the test bench, and saw that there was a glass cylinder slightly smaller than a fist on the platform, and a rough instrument, this instrument did not even have a shell package, the magnets, springs, wires, and pointers inside were exposed outside, and there were only some simple fixtures, although Li Zexuan could roughly guess the function of this instrument, but the appearance of this thing was really flattering!

As for the glass cylinder with a slightly smaller fist, it should be the first transistor in the world, because there are still three electrode connectors exposed on the outside of the glass cylinder, but... This transistor is too big, the triode used by Li Zexuan in his previous life are all semiconductor (crystal) transistors, only the size of a fingernail, and with the development of microelectronic technology, the size of some crystal transistors can even be less than 10nm, compared with it, it is not an exaggeration to call this electronic triode in front of him a behemoth!

"Qingque, I'll take a look if you connect the phone!"

Li Zexuan knew that now was not the time to pick and choose, after all, under today's conditions, it was not easy for Li Tai to make a triode, and it would be a little embarrassing to ask for anything else, so he pointed to the triode on the table and said to Li Tai.

"Okay! Wait a minute! ”

Li Tai nodded in response, and then began to wire with numbness in his hands and feet, and after a while, he turned on the power switch, pointed to the meter, and said:

"Chief, you see, the current at the cathode is 0.7, and I will now connect the ammeter to the anode end... See, the current reaches 3.8, which is about five times the magnification! This proves that a weak signal change in the voltage at the gate can modulate the current flowing from the cathode to the anode, so that a current can be obtained that is the same as the input signal change, but with a much increased intensity! ”

Li Zexuan saw this series of operations in his eyes, and at this time he couldn't help but stroke his palms and sighed: "Okay!" Good! Good! I didn't expect you to be able to make a triode so quickly, it's not easy! Now that we have diodes, transistors, and resistors that stabilize the resistance, the academy can begin the work of renovating the telegraph! ”

Li Tai thought for a while and asked: "Shan Chang, the kind of resistance you said before has been made by the workshop, but I think its volume is too large, if you need a resistor with a larger resistance value in the future, the volume will be larger, if it is used in the circuit, it will seriously affect the volume of the entire product, I wonder if there is any material that can replace steel to make resistance?" ”

Previously, in order to facilitate Li Tai to make voltmeters, Li Zexuan proposed that he could first make a steel with a length, width and height of one inch as a standard resistor, but speaking of which, although the conductivity of steel is not as good as copper, it is still good, the resistance of a section of iron wire is very small, and it is somewhat inappropriate to make a resistor.

These two kinds of resistors are difficult to make under the current process conditions, and 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, and then press the mixture, and then go through heat treatment to make a section of resistance rod, the resistance made of this material is thinner than chopsticks, about only a quarter of an inch long, but the range of resistance value can be very wide, which can fully meet the needs of various occasions! ”

The resistor he is talking about is called a carbon resistor in modern times, and its resistance value is represented by a color ring on the resistor. Its materials are cheap, low cost, and have a wide range of resistance, but the performance is poor, and it is rarely used, and it is basically replaced by metal film resistors and chip resistors with more stable performance in the market.

However, for the current Datang, it is quite remarkable to be able to use carbon resistors!

"Carbon black, resin, clay? Yamana, can the resistors made of these things work? ”

Li Tai was stunned for a while, using carbon black, resin, and clay as resistors, no matter how you listen to this, it feels unreliable!

Li Zexuan smiled slightly and said, "Why can't this be used?" Not only does it work, but it's also very easy to use! If you don't believe me, Qingque, you can find a craftsman in the workshop later and help you try to make a batch of such resistors! ”

Li Tai scratched his head and said, "Okay! Then I'll go find someone and try to do it later! ”

Li Zexuan nodded and said, "Hmm! Then this matter is settled! This afternoon, I will officially announce the launch of the second and third killer projects at the Academy, and you will also attend the meeting at that time! ”

"Huh? Chief, what can I do when I go to this kind of meeting? No, no, no, I still have a bunch of things to do here! ”

When Li Tai heard this, he quickly shook his head and said.

When it comes to major projects such as killer projects, they are basically led by the gentlemen of the college, and the students only play a role in assisting them, Li Tai feels that it is better for him not to participate in this kind of meeting, which is a bit of a waste of time!

Who knew that Li Zexuan still insisted: "Qingque, you have to go to this meeting this afternoon, after all, the two killer projects behind this are indispensable to you!" ”

After that, he didn't wait for Li Tai to react, and left directly.

"Me? What does this mean? ”

Li Tai's eyes were puzzled, and gradually, he suddenly thought of something, and he couldn't help but feel a trace of excitement in his heart.

...........................

"I have summoned all the gentlemen to this meeting today, mainly because I have something important to announce!"

In less than three minutes, 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 is now approaching the end of the semester, and every course is basically finished, and the students just need time to review. Seeing that all the teachers were here, Li Zexuan said in a deep voice.

Seeing Li Zexuan so solemn, everyone couldn't help but mention the spirit of twelve points one by one, waiting for the following.

I only heard Li Zexuan say: "The gentlemen here have all passed the academy's confidential examination and signed a confidentiality agreement, today's meeting is a top-secret meeting, and the meeting minutes are directly characterized as top-secret documents, and after the meeting, Mr. Yan will send someone to file and lock, and what you hear for a while, you are not allowed to leak it to others, including your family, violators will be handed over to 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 secrecy system, there has never been a top-secret incident, you must know that top-secret technology is related to the security and life and death of the country, and it is easy for no document to be defined as top-secret, but it can also be seen that today's meeting is of high standard and important content!

Everyone arched their hands with serious faces: "Yes!" Mountain Chief! We will strictly abide by the confidentiality system of the College and will never leak the contents of today's meeting! ”

"Good! Now it's official! ”

Li Zexuan nodded, and said in a deep voice: "I summoned you here today to inform you that from today onwards, the second and third killer projects of Yanhuang Academy have officially started to be approved, yes, you heard it right, it is two killer projects that are approved at the same time!" ”

At the beginning of the year, Li Zexuan proposed a 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 directly proposed two killer projects, which 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 engineering projects, which made the gentlemen of the academy feel a sense of solemnity!

"Chief, what are the contents of the second and third killer projects? Will it be too stressful to carry out at the same time? ”

Mo Huai couldn't help but ask.

Everyone else also set their sights on Li Zexuan.

Li Zexuan replied: "Of course, there is pressure, but it must be overcome, and I have sufficient reasons why I chose to establish two killer projects at the same time." Let me talk about the specific tasks of these two projects!

The second killer project is aimed at improving the current telegraph, one is to add signal amplification circuits to telegraphs and increase the transmitting power of telegraphs; Second, it is necessary to install geophones for telegraphs to identify useful information in electromagnetic waves and enhance the signal recognition ability and anti-interference ability of telegraphs; Third, it is necessary to build telegraph relay stations in key prefectures and counties to be used as relay for the transmission and reception of electromagnetic waves, so as to further increase the communication distance of telegraph machines!

The ultimate goal of this killer project is to increase the effective communication distance of the telegraph by more than 1,000 miles, or even farther! The key electronic components required in this project have been done in the workshop, and the personnel involved in the project can go to the workshop to learn more about the details! ”

"The communication distance is a thousand meters!"

Hearing this indicator, everyone present couldn't help but gasp, thousands of miles of sound transmission, this is really equivalent to thousands of miles of sound transmission! If this had been left in the past, they would definitely have scoffed if they heard this, but in the past year in Yanhuang Academy, they had seen too many incredible things, so even if the gentlemen felt unbelievable at this time, no one would refute it!

Seeing that everyone had an incredible expression, Li Zexuan smiled and said: "Although this sounds a little unbelievable, but you have been in the academy for so long, and you all have a certain understanding of engineering, especially the gentlemen of the physics group, you should know that the goal I just mentioned is not completely impossible to achieve, right?" ”

The physics gentlemen around Mo Huai were all hesitant and moved.

Mo Huai arched his hand and said: "What Shan Chang just said, it is not completely impossible, the crux of the problem is, does the workshop now have devices that can carry out power amplification and electromagnetic wave detection?" If there is, then it is possible to achieve a communication distance of 1,000 miles! ”

Li Zexuan smiled when he heard this: "This Mr. Mo just rest assured, now everything is basically ready, only the east wind is owed!" Now let me talk about the third killer project! From now on, the college will set up a measurement standards committee, with me as the president, and Mr. Xu Hongzhi, Mo Huai, and Wang Ji as the vice presidents, and the purpose of the establishment of the measurement standards committee is to formulate measurement units and measurement standards for some new physical quantities, such as current, voltage, resistance, etc.!

This third killer project first needs to 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 unit of length from smallest to largest, from smallest to largest, to millimeters, centimeters, decimeters, meters, and kilometers, of which 3.07 meters is equivalent to the current one zhang.

One meter is equal to ten meters, equal to one hundred centimeters, and equal to one thousand millimeters, according to this conversion relationship, the academy needs to make a new measuring tool, and in the future, all the items of the academy must be changed to this new measurement unit, which is conducive to more sophisticated production!

The reason why the two killer projects should be established and carried out at the same time is mainly because there are many cross-links in these two projects, which can play a role in promoting and promoting each other! ”

(According to the literature, one zhang in the Tang Dynasty was about 3.07 meters)

As soon as the words fell, a faint "buzzing" sound suddenly sounded in the conference room.

Li Zexuan wants to formulate units and measurement standards for new physical quantities, and he even wants to change the unit of length that has been ingrained in everyone's minds, which is a bit difficult to adapt!

However, the reason given by Li Zexuan is too strong, because the new unit is indeed more refined than the previous inches, rulers, and zhangs, and is also more conducive to precision machining and precision production.

"Huh! I know that you may not be able to accept the new unit of measurement for a while, but in the future, when you participate in precision manufacturing projects, you will know the benefits of this new unit of measurement! ”

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 of these two killer projects! Mr. Mo Huai was appointed as the chief designer of these two killer projects, and Li Tai, Mo Chui, and Xu Hongzhi were appointed as the chief designers. The deadline for these two tasks is four months, and within four months, it is important to achieve the set goals! ”

A stone startled a thousand waves, as soon as this remark came out, everyone was stunned, and at this time, the gentlemen of the academy noticed that Li Tai had been standing behind Li Zexuan, and let a student serve as the deputy chief engineer of the killer project, is Li Zexuan crazy?

........................