Tech house system

More than a month after the start of school, Wei Shuxun finally had the opportunity to get in touch with a little bit of professional-related courses - "Electrical and Electronic Training".

The early stage of "Electrical and Electronic Training" is all about the basic principles of electronics, circuit diagrams, and the teaching is limited to textbooks. Wei Shuxun has learned the basics of electrical engineering and electronics before, and he has learned a lot of electronic knowledge with Sun Yi. After reading the textbooks, he feels dizzy and drowsy.It took more than a month for the teacher to talk about the identification of electronic components. He had already finished the rest by himself, and when he was considering whether to skip class, he finally ushered in the production course.

The first class is how to use commonly used instruments and meters. The teacher took everyone to the electrical engineering department, and taught everyone "how to use the electric pen correctly" under the expectant eyes of the students.

Wei Shuxun almost vomited blood, but the teacher said that the electric pen is an essential initial tool for electricians, and even the electric pen can’t be used well, let alone other instruments, and he doesn’t even know if there is any leakage.

So everyone can only suppress their emotions, and under the guidance of the teacher, learn how to hold the electric pen correctly and how to distinguish between alternating current and direct current.Fortunately, except for the wordy electric pen, other tweezers, socket wrenches, long and short chisels, wire strippers, pipe wrench, multimeter, megohmmeter, etc., are just explained in a few words.There is even an impact drill in the classroom, but unfortunately the teacher does not allow it to be used.

Although they are majoring in electronics, many people have never been exposed to hardware tools since they were young, especially girls, who still don’t know how to use common tools such as multimeters after listening to the teacher’s explanation.As for megohmmeters, wire strippers, pipe wrench and other tools, I have never even heard of them. Some male students who will be able to take the opportunity to guide them and get compliments of admiration.So the originally lazy male students instantly became active, and enthusiastically taught the girls how to use common tools.

"Shu Xun, how do you use this wire stripper?" A girl next to Wei Shuxun held a wire stripper in her right hand and a scrap wire in her left hand. She still didn't seem to understand how to strip the wire, so she turned to Wei Shuxun.

"...I don't know." Wei Shuxun was weak, and didn't understand why Wu Feng and his group could explain the use of these basic tools so enthusiastically.I don't even understand these girls, who obviously don't know anything about electronics and obviously didn't like it before, why they still apply for this major.

Later, several girls asked Wei Shuxun, but he didn't know.

How should I put it, girls are cute when they act like a baby, but Wei Shuxun doesn't like their attitude.As a student majoring in electronics, I don't even know the tools, so I wasted a whole class to learn how to use them, and I just laughed and acted cute as a joke.The teacher specially taught everyone to know the tools in the first class to give them time, and they have not realized it yet!

Fortunately, the second class finally started the formal course: printed circuit board design and production.

The printed circuit board is the most primitive circuit board. Print the anti-corrosion film pattern on the copper-clad board, and then mark the lines according to the film pattern pattern. This technology is as simple as printing on paper, so it is called a printed circuit board.

Double-sided circuit boards and multi-layer circuit boards are commonly used now, but printed circuit boards are the simplest and are the best basic course for students who are just starting to learn.

The production method of the printed circuit board is very simple, that is, use rivets and terminal posts as contacts on a blank circuit board, lay out the circuit according to the circuit diagram, and install the corresponding components.

In order to take care of the beginners, the PCB diagram of the circuit board is so simple that it is just a few simple lines. The most complicated line is a broken line, and the others are all straight lines.In addition, the PCB diagram was printed on the transfer paper in the early stage, the material was cut, and the transfer was printed. Because there are many students, it is all done by the teacher.The students watched the operation, and then took the prepared circuit board for the final step of etching, drilling, and surface coating.

For students who have never been exposed to electronics, this is actually a very interesting experience. Even Wei Shuxun and Sun Yi have made many things with the finished integrated circuit boards. The printed circuit board was definitely never done.But how should I describe this feeling? It's like a fashion designer who is full of enthusiasm and wants to learn international fashion design, but the first step is to teach him to sew buttons. One can imagine the depression.

Finished the work with a blank face, and handed it in with a blank face, and got the highest score on the spot, 99 points.The teacher also praised: "I just found out that you are very flexible. It seems that you have learned it before. Keep going."

Wei Shuxun twitched the corners of his mouth expressionlessly. After class, he ran to the laboratory and searched out the various designs left by Sun Yi and the other three before starting to make them. Any blueprint is more interesting than a printed circuit board!

When the three of Sun Yi returned to the laboratory to rest, they saw Wei Shuxun who had already made several finished products lying on the experimental table, and looked at each other suspiciously: "What stimulated him?"

Fortunately, although the third lesson is still about the printed circuit board, it has already mentioned the schematic drawing design.The content includes layout principles, signal flow, heat dissipation principles, electromagnetic compatibility design, etc.

Although if you know it, you will find that it is just some very simple principles, and it can only be regarded as precautions, but what Wei Shuxun lacks is these foundations, and carefully write down every word with a pen.

The teacher's explanation is in the classroom, using a large-screen slide show to play the lecture notes.But the students looked at the tools on the lab table and couldn't hold back for a long time, wanting to make it like last time.So someone urged loudly: "Teacher, you can't just look at it. It's better to learn while doing it, so that you can learn faster!"

"That's it!" The other students echoed.Now a complete integrated circuit board can be bought in any electronic market, and the price is not expensive, so there is no need to waste time learning printed circuit boards.Their anticipation for this class is not so much for hands-on production, but for taking the opportunity to show off in front of girls.

"Shut up!" Wei Shuxun frowned and said shut up when everyone started booing.

His voice is not loud and his tone is not harsh, but he has always been popular and authoritative in the class.Almost as soon as he spoke, the whole class immediately fell silent.

Wei Shuxun quietly looked at the somewhat sluggish teacher, and said, "Teacher, please continue."

"...Oh, oh, good."

The teacher teaching "Electrical Engineering and Electronics Training" is a young new teacher with no teaching experience. He only believes that teaching should arouse students' interest as much as possible. Seeing that everyone is not interested in theory, he is ready to stop explaining.Anyway, for most people, these theories may not be used in their lifetime.

Unexpectedly, a student's soft words made the whole class quiet down.The young teacher opened his mouth, finished explaining the theory in a dull manner, and finally said: "I have drawn the drawings, one for each person. The design requirements must meet no less than 80 pads, the width of the wires is 30mil, and the size of the pads It is D=60mil, d=25mil. The tools and drawings are complete, and it is up to you how to do it.”

There may be something, after assigning the homework, the teacher left, leaving each person with a drawing, a workbench, and a few copper plates to start making.The workbench is free to choose, and every girl has asked a boy for help. In view of Wei Shuxun's indifferent performance in the last class, no one came to him, and he was happy to be free.

The copper plate was cut out quickly, and the drawing began.It is to use carbon paper to draw drawings on the copper foil surface.In the middle of the drawing, a classmate suddenly walked behind Wei Shuxun and bumped into him. Wei Shuxun tilted his pen and slashed across the entire board, destroying a piece of drawing.

Wei Shuxun turned his head to look behind him, and saw his classmate Zhong You raised his chin and said, "Sorry, I accidentally bumped into you."

Wu Feng next to him grabbed him: "Why are you not careful, you obviously bumped into it on purpose!"

"What, what, do you want to hit someone?" Zhong You didn't know whether he was frightened or deliberately trying to make trouble, so he yelled, and the students next to him all turned to this side.Wei Shuxun frowned, and pressed Wu Feng: "Forget it, leave him alone."

"Hmph, be careful!" Don't say it's class time, and you can't hit someone just because you were bumped.Although Wu Feng has a reckless personality, he is also very reasonable.He could only give a warning and push him away.

"Hmph, are you afraid of you?" Although Zhong You said so, but the speed of slipping was not slow at all, and he was deeply afraid that Wu Feng would really make a move.

Last semester, because of gambling, the classmates in the same class were almost beaten by gangsters. Zhong You wanted to clean himself up by splashing Wei Shuxun black water, but Wei Shuxun beat him up in front of the whole class, and he was ashamed He's exhausted, and his reputation is also bad, and the whole class doesn't like to talk to him.Zhong You really fears and hates Wei Shuxun, but he just can't beat him. Wei Shuxun is popular in class, and he doesn't have any bad hobbies in his daily life. He can't make up any content even if he wants to spread rumors, so he can only bear it bitterly.

Not long after the start of this semester, two girls competed for Wei Shuxun. The most outrageous thing is that although they were both dumped, not only the two girls who were rejected, but also other female students praised Wei Shuxun, I think he refused simply, didn't engage in ambiguity and play with girls' feelings, he is a good man.

He was the one who told the teacher not to lecture and directly made it, of course, because there happened to be a pretty female classmate next to him.Unexpectedly, Wei Shuxun scolded him to shut up again.At this time, Zhong You had forgotten the pain of being beaten last semester, and only remembered the scene of Wei Shuxun bullying him, coupled with the jealousy generated during this period, due to his timidity, he did not dare to do bad things, so he only dared to leave on purpose Came over to bump into Wei Shuxun, destroying his homework.

"Shu Xun, I saw that he bumped into you on purpose." Wu Feng said angrily, looking at Zhong You who was hiding back.

"I know, my drawing is broken, I will borrow yours."

"Oh, then you have to wait a moment, I haven't finished drawing yet."

"Well, it's okay, I'm in no hurry."

Everyone started to make, only Wei Shuxun waited aside because he had no drawings.With his personality, even if the blueprint is damaged, he won't say anything, as long as the other party doesn't do it on purpose.But even if it was intentional, he would have scolded at most before, and would not beat someone up for a blueprint, not to mention that he had decided to be a really good student.

Wei Shuxun pushed his glasses, twirled the pen with his fingers, and walked leisurely behind Zhong You.

Zhong You shrank his shoulders and hid to the side: "What, what are you doing?"

"It's nothing, my drawing is broken, so I have nothing to do." Wei Shuxun smiled.

"What? Do you want to hit someone? I, I will sue the teacher!" Zhong You yelled fiercely, and the girl next to him looked at him in surprise and contempt.

"Don't worry, it's just a blueprint. I won't beat someone up for such a trivial matter." Wei Shuxun pushed his glasses, and tapped the pen tip on Zhong You's blueprint: "It's a waste of a blueprint."

Zhong You looked at Wei Shuxun inexplicably and left after finishing speaking, came back to his senses, and taunted: "Hey, you are putting on airs, I forgive you for not daring to hit me."

Obviously played last semester.The girl next to her calmly moved the workbench further away.

Wei Shuxun walked back to the workbench. Wu Feng had just finished drawing, so he handed him the drawing and asked curiously, "What did you ask Zhong You for?"

"It's nothing, just add a little bit." Wei Shuxun said calmly.

"Added a point?"

"Added a dot to the value of the width of the ground generatrix." Wei Shuxun pushed his glasses: "I don't know if he can find it."