MTL - Tech House System-Chapter 68 Formal professional courses

After more than a month of school, Wei Shuxun finally had the opportunity to get in touch with a little professional-related course - "Electrical and Electronic Training".

In the early stage of "Electrical and Electronics Training", the basic principles of electronics, circuit diagrams, and teaching are limited to textbooks. The textbook just felt dizzy and sleepy. It took more than a month for the teacher to talk about the identification of electronic components. He had already finished the rest of his studies by himself. When he was considering whether to skip class, he finally ushered in the production course.

The first lesson is how to use common instruments and meters. The teacher will bring you to the electrical engineering classroom, and in the eyes of the students, he will teach you "how to use the electric pen correctly".

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 using other instruments. Know.

So everyone can only hold back their emotions, and under the guidance of the teacher, learn how to correctly hold the electric pen and how to distinguish between alternating current and direct current. Fortunately, except for the electric pen, other tweezers, socket wrenches, long and short chisels, wire strippers, pipe wrenches, multimeters, megohmmeters, etc., are all explained casually. There are still impact drills in the classroom, but unfortunately the teacher does not allow them to be used.

Although they are majoring in electronics, many people have never been exposed to hardware tools since childhood, especially girls, a common tool such as a multimeter is still not used after listening to the teacher's instructions. As for the megohmmeter, wire strippers, pipe wrenches and other tools, I have never heard of them. Some male students who knew how to take the opportunity to guide them were praised with admiration. So the male classmates who had been slack in the past became active in an instant, and enthusiastically instructed the girls how to use common tools.

"Shuxun, how do you use this wire stripper?" A girl next to Wei Shuxun was holding a wire stripper in her right hand and an old wire in her left hand. She still didn't seem to understand how to strip the wire, so Turning to ask Wei Shuxun.

"...I don't know." Wei Shuxun was weak, and didn't understand why Wu Feng and his group were so enthusiastic about how to use these basic tools. I don't even understand that these girls have no knowledge of electronics at all, and obviously didn't like it before, so why should they apply for this major.

Afterwards, several girls asked Wei Shuxun, but he never answered.

How to say, girls are cute when they act like a spoiled child, but Wei Shuxun doesn't like their attitude. As a student majoring in electronics, I don't even know the tools, I wasted a whole class to learn how to use it, and I laughed and pretended to be fun. In the first lesson, the teacher specially taught everyone to know tools just to give them time, but they didn't realize it yet!

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

called a printed circuit board.

Double-sided circuit boards and multi-layer circuit boards are now commonly used, but printed circuit boards are the easiest and 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, on a blank circuit board, use rivets and terminals as contacts, lay out the lines according to the circuit diagram, and install the corresponding components.

In order to take care of the beginner students, the PCB diagram of the circuit board is so simple that it is just a few simple lines. The most complicated line is a polyline, and the others are all straight lines. And in the early stage, the PCB diagram was printed on the transfer paper, and the material was cut and transferred. Because there were many students, they were all done by the teacher. The students watched the operation on the side, and then took the circuit board that had been prepared, and carried out 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 if Wei Shuxun followed Sun Yi and the others to make a lot of things, they also used finished products The integrated circuit board, the most basic printed circuit board has never been done. But how can I say this feeling? It's like a fashion designer who is full of energy and wants to learn international fashion design, but the first step is to teach buttons to sew. The depression can be imagined.

Complete the work with a blank face and hand it in with a blank face, and get 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 to search for various designs left by Sun Yi and the three of them before and began to make them—he used to dislike these designs being too simple. Now I don't dare to dislike it, any of these blueprints are more interesting than printed circuit boards!

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

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

Although if you can, you will find that it is only some very simple principles, and even can only be regarded as precautions, but it is these foundations that Wei Shuxun lacks. down.

The teacher's lecture is in the classroom, using a large-screen slide show to play the lecture. But the students looked at the tools placed on the experimental bench and couldn't hold back for a long time, and wanted to make them as they did last time. So someone urged loudly: "Teacher, you can't see it just by looking 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 expectation for this class is not so much for hands-on production, but for showing off in front of girls by taking the opportunity.

"Shut up!" Seeing that everyone started booing, Wei Shuxun frowned and said shut up.

His voice is not loud and his tone is not severe, but he has always been popular in the class and has prestige. Almost as soon as he opened his mouth, the whole class fell silent.

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

“…oh, oh, good.”

The teacher who teaches "Electrical and Electronic Training" is a young and new teacher. He has no teaching experience. He only believes that teaching should arouse students' interest as much as possible. . Anyway, for most people, these theories may not be useful for a lifetime.

Who knew that a single word from a student would make the whole class quiet. The young teacher opened his mouth, explained the theory in a dull manner, and finally said: "I have already drawn the drawings, one for each person. The design requirements must meet no less than 80 pads, the wire width is 30mil, and the pad size is 30 mils. For D=60mil, d=25mil. The tools and drawings are complete, how to do it is up to you."

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

The copper plate was quickly cut and the drawing started. It is to use carbon paper to draw drawings on the copper foil. Halfway through the drawing, a classmate suddenly walked past Wei Shuxun and bumped him. Wei Shuxun's pen slanted and swiped across the entire board, destroying a 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: "What's wrong, you clearly bumped into it on purpose!"

"What's the matter, want to hit someone?" Zhong You didn't know if he was scared or deliberately wanted to make trouble, so he shouted, and the classmates next to him turned to this side. Wei Shuxun frowned, holding down Wu Feng: "Forget it, leave him alone."

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

"Humph, are you afraid of you?" Although Zhong You said that, his speed was not slow at all.

Because of gambling last semester, my classmates were almost beaten by gangsters because of gambling. Zhong You wanted to wash himself by splashing Wei Shuxun with black water, but Wei Shuxun was in front of the whole class. After a beating, he lost his face and got a bad reputation. The whole class didn't like to talk to him. Zhong You really feared and hated Wei Shuxun, but he couldn't beat him. Wei Shuxun was popular in the class, and he didn't have any bad hobbies in his daily life.

This semester has just started, and soon two girls competed for Wei Shuxun. The most excessive thing is that although they were both dumped, not only the two rejected girls, but also other girls The classmates praised Wei Shuxun very much, and felt that he rejected him simply, did not engage in ambiguous play with girls' feelings, and was a good man.

He was the one who first told the teacher not to give lectures and do it directly. Of course, the reason was because there happened to be a pretty female classmate beside him. Who knew that Wei Shuxun scolded him to shut up again. At this time, Zhong You had forgotten the pain of being beaten last semester. He only remembered the scene where Wei Shuxun was bullying him, and the jealousy and hatred he had generated during this time. Since he was timid, he didn't dare to do anything bad, so he only dared to leave on purpose. Come and hit Wei Shuxun and sabotage his homework.

"Shu Xun, I saw that he hit you on purpose." Looking at Zhongyou who was hiding, Wu Feng said angrily.

"I know, my drawing is broken. I'll borrow yours."

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

"Well, it's okay, I'm not in a hurry."

Everyone started to make, only Wei Shuxun waited because he didn't have any drawings. With his character, even if the drawing is damaged, he won't say anything, as long as the other party didn't do it on purpose. But even if it was intentional, he used to scold at most, and would not beat someone for a drawing, not to mention that he had already decided to be a really good student.

Wei Shuxun pushed his glasses, turned the pen with his fingers, and walked leisurely behind Zhongyou.

Zhong You shrank his shoulders and ducked to the side: "What, what?"

"Nothing, my drawing is broken, I have nothing to do." Wei Shuxun smiled.

"What? Do you want to hit someone? I, I will sue the teacher!" Zhong You shouted sternly, and the girl next to him gave him a surprised look, showing contempt. .

"Don't worry, it's just a drawing, I won't beat someone for such a trivial matter." Wei Shuxun pushed his glasses and tapped on Zhongyou's drawing: "Wasting a drawing. "

Zhong You inexplicably watched Wei Shuxun leave after he finished speaking, then came back to his senses and taunted: "Hey, pretending, forgive me, you don't dare to hit me."

I played it last semester. The girl next to her quietly moved the workbench away.

Wei Shuxun walked back to the workbench. Wu Feng just finished drawing and handed him the drawing. At the same time, he asked curiously, "What did you do with Zhongyou just now?"

"Nothing, just add a little bit." Wei Shuxun said calmly.

"Added a dot?"

"A dot is added to the width of the ground bus." Wei Shuxun pushed up his glasses: "I don't know if he can find it."