Speaking of microcontrollers, we must mention 8051. This 51 series microcontroller is widely used in industrial control systems. Anyone who learns electronics does not learn 51 series microcontrollers, and even in 2020, it is still the same.
It is a common microcontroller. Although the technology is backward, it is enough.
However, now, an 8051 microcontroller is too expensive, and the number of imported domestically is also rare. The ones that can be bought on the market are mainly 8031 microcontrollers. This microcontroller is actually the previous generation model of the 8051 microcontroller. All languages are universal.
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However, because 8031 is the previous generation model after all, this model does not have a built-in PROM memory, so if you want to use this microcontroller, you must also match it. For example, the 74LS373 and EPROM2716 next to it, these chips can form a smallest microcontroller system together.
, the combined three chips cost more than one hundred yuan.
"Brother Zhenhua said that to be an ordinary inverter, the output of not pure mysterious waves, but square waves, which are used to simulate pure sine waves, is really a shame, so in order to best create pure sine waves,
I had to use a microcontroller. I learned how to program a microcontroller, but there is no special equipment in our factory, so the program was burned into by Brother Qiang."
Even in later generations, many cheap inverters are square waves or sine waves. When they encounter electrical appliances for inductors, such as refrigerators and washing machines, they have to kneel down. Only pure sine waves can be perfect.
In the simulation, Qin Zhenhua is a person who pursues perfection. That day, he found that Wang Erzhu had used a few thyristors to tinker with, and decided to make the best solution.
Now, Professor Wang Limin, who was amazed at this thing, made Qin Zhenhua feel strange: "Hey, Professor Wang, you are the dean of the college, with a high position and a powerful person. Why did you enter the Grand View Garden like Liu Laolao? What's the matter?
Strange?"
"No, no, this thing is too advanced!" Professor Wang Liming said: "This is called high-tech! Erzhuzi, your overall design drawings and procedures, can you give me a copy?"
"What's the difficulty with this?" Wang Erzhu said: "You want to wait until you return to the first machine factory and I'll look for you."
"Wait." At this moment, Qin Zhenhua spoke, "No, I think this matter is not that simple. Professor Wang, what are you planning to do? We have the right to know."
"Our Capital Institute of Technology has established a school-run factory. However, there is no specific plan for what this school-run factory wants to produce. Some people say they are doing washing machines, TVs, etc., but those investments are too great. Our school is doing it.
I can’t afford it, I want to create some small products, and it also needs to reflect the level of our university. I think this is very good."
Back then, the vigorous production movement began, and the school was not willing to fall behind. In addition to "the nation's steelmaking", the school also had to "study work" and "study agriculture". It was at that time that the school set up a "school-run factory"
"and "school-run farm".
At that time, the state also had relevant bills. In the "Sixty Work Methods" Article (Draft)", there was: Under possible conditions, several schools could jointly establish affiliated factories or workshops.
You can also enter into a contract for participating in labor with a factory, construction site or service industry.
However, in that era, school-run factories were just to drive them to put them on the shelves. Some school-run factories built screws, but the spacing of threads was uneven, and the hexagonal shape of the nuts was asymmetric, and they eventually became waste.
The factory not only did not bring production value, but became a laughing stock.
Now, everything is back on track. In 1983, the State Council approved the Ministry of Education, the National Planning Commission, the National Economic Commission, and the Ministry of Finance’s “Requests on Further Carrying out Work-Study Activities” and the “National Interim Work-Study Regulations for Part-time Work-Study in Primary and Secondary Schools” to further clarify the
As an important base for work-study and study, the school-run factory pays attention to economic benefits, but takes education as the fundamental purpose. It implements internal enterprise management and economic independent accounting.
It is the internal enterprise management and independent economic accounting that can truly make the school-run factories go on track. As for the university, the school-run factories are of great significance. It is on-campus teaching, scientific research, and production.
Three-combination base.
Students can conduct teaching internships and other practical activities in the small class project, so that students can connect theory with practice; at the same time, they can also develop and produce products according to social needs, increase school income, and improve school operating conditions.
Although Capital Institute of Technology is a direct university in the Ministry, in this era, everything is about money. If the school does not have its own small treasury and its own means of getting rich, the school will not be able to develop.
After all, it is still the era of free college entrance examinations, and schools cannot generate income through tuition fees.
"Professor Wang, President Wang." Qin Zhenhua looked straight: "So, for the development of your Capital Institute of Technology, you plan to make money by making money in this way and directly take Wang Erzhu's hard research results for yourself.
?Isn't that good?"
"Brother Zhenhua, I..." Wang Erzhu wanted to say, I don't care. Professor Wang leads a college. He does this for the benefit of the entire college. It is also worth it that I can make my own contribution.
This is Wang Erzhu’s inner thought. After all, this was just developed by himself after work. However, if Brother Zhenhua said this, it must have a deep meaning, so he didn’t continue.
"Haha, Zhenhua, tell me, what are your conditions?" Wang Liming asked Qin Zhenhua. Wang Liming was already very familiar with Qin Zhenhua. He knew that he said this now, but that enthusiasm was just coming up again.
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Cao Jianli was watching there, without saying anything, as if she was funny, and as if she was thinking about something else.
"For every product sold, the commission of 2 pillars is 20%. As the patent fee for his invention, the term is set for twenty years. Our country has promulgated a special intellectual property protection law, Professor Wang,
The importance of intellectual property rights starts with your colleges and universities.”
Wang Limin's face suddenly turned black: "Impossible. Twenty percent? You are robbing this! Two percent is about the same!"
"Okay, then 2% of it, Professor Wang, what he said is the water he poured out, don't refuse to admit it."
In an instant, Wang Liming's face turned red again: "This, this..."