The principle of the multimeter is very simple, it can measure the resistance value, DC voltage, DC current, AC voltage, AC current and other electrical signals, as for other measurement content, the conditions are not allowed, and it is not designed for the time being.

Li Guocheng changed a blank piece of paper, picked up a pencil and sketched it, and completed the principle design in a short time. At this time, Yan Jiefang walked in with a lunch box.

"Brother Li, I see that you have been explaining to us, and I didn't have time to eat, so I called you for dinner", Yan Jiefang smiled honestly.

Li Guocheng became more and more satisfied with Yan Jiecheng, and he had the vision to see. I have known him since childhood, there is no major problem, as long as he is willing and can keep up, Li Guocheng doesn't mind pulling him.

"How much?"

"Brother Li, no, I'll invite you", Yan Jiefang said embarrassedly, but looking at Li Guocheng who was staring, he was very smart from his heart.

Li Guocheng handed him the money ticket, "Thank you, go back quickly, and work hard in the future."

When Yan Jiefang was first transferred to the laboratory, he was very happy, thinking that he would be able to soar from now on, but he didn't expect to be a disadvantage. Li Guocheng arranged jobs for everyone, but he didn't care about him. At that time, he didn't even know how he got home.

After that, I never saw Li Guocheng again, and I finally saw him today. He approached cautiously, but he didn't expect Li Guocheng to treat himself normally as before, so he was relieved at this time.

In fact, what he did before was deliberate by Li Guocheng, so he wanted to test him. After all, he has been influenced by the three masters since he was a child, and I am afraid that he will not be able to carry the big and small kings, and he will not have a good result in the laboratory.

When I heard about his performance, I felt a lot more at ease and felt that I could continue to cultivate.

After everyone left, Li Guocheng drank a cup of hot tea, and the tea came from Yuan Lao.

First, the components on the workbench are scanned to form a 3D model in your mind. Then sit on a chair and lay out a Ge You. At this point, I have in mind the circuit diagram I just drawn.

All the components were replaced with a 3D model, and after checking that there were no problems, the layout was started with the aim of minimizing the area of the circuit board while meeting the electrical requirements.

Placed it repeatedly, half an hour later, looking at the last version in my mind, Li Guocheng is so beautiful. It's been a long time since I graduated and I haven't designed a circuit.

The final step is wiring, which is to link all the components according to the circuit diagram. Since there are no circuit boards yet, the devices can only be fixed on an insulating substrate and connected with enameled wires.

In order to make the connection more beautiful and prevent short circuits, Li Guocheng spent another hour simulating the connection in his mind.

After all the preparations were completed, Li Guocheng took an epoxy resin board, cut it into the size of his mind with a carving knife, and accurately punched holes according to the position of the device in his mind.

Insert the devices into the substrate in turn, fix them with glue, and connect them one by one according to the three-dimensional wiring diagram, and the wiring direction and position of the enameled wire are exactly the same as the three-dimensional diagram in your mind.

After the circuit board soldering was completed, it was re-checked, and there was no problem, and it was set aside.

He took out a piece of red sandalwood from the secret realm and began to carve, and the whole shape completely reproduced the classic Fluke multimeter of later generations. Even the dial knobs are exactly copied.

Looking at the final product, Li Guocheng's evil taste in his heart seemed to be released.

Two batteries were attached and calibrated using that suitcase-style voltmeter. In fact, the accuracy of this old-fashioned voltmeter is also inaccurate. Anyway, now the first multimeter he made by hand is the benchmark.

According to the voltage scale, the values of current and resistance are calculated using Ohm's law, and all measurement types are calibrated.

Buckle the back cover, look at the multimeter with modern industrial aesthetics in your hand, I dare not say that it is the world's first real multimeter, but it must be the most beautiful multimeter.

After admiring the multimeter for a while, he put it aside.

Go to the drawing board and put the drawings in the drawer. Take out a circuit diagram of a radio from the secret laboratory,

Using the same method, I first formed a three-dimensional model in my mind, and because radio signals tend to interfere with each other, this time I used the method of connecting wires while laying them out, and because of the experience with multimeters, the model construction went very smoothly.

When the three-dimensional construction of the entire circuit diagram was completed, his head hurt, and Li Guocheng knew that his mental power had been consumed.

Take out a wooden folding bed from the secret realm, spread the quilt brought by the family, and fall asleep.

The next morning, Li Guocheng woke up automatically before 6 o'clock, which was worthy of a deep sleep, and in one night, his mental power was fully restored.

The inspection door has been plugged in, and he walks into a hidden corner, enters the secret realm, and completes his daily cultivation.

I got up too early, breakfast in the cafeteria was not ready, and I continued to check the 3D model of the radio, modified a few unreasonable layouts and wiring, and completed the drilling of the substrate before half past seven.

Carefully cleaned up the trivial crumbs on the workbench and clothes, and walked to the cafeteria with the lunch box.

A small porridge, a nest, a pickle, a simple breakfast.

Back in the laboratory, everyone came to the laboratory one after another, and as soon as they entered the first assembly laboratory, they found that Zhou Xiaojuan and Zhang Zhijing were fiddling with the multimeter with great interest.

"Oh, two girls, pay attention, it's a precious thing, the only one in the world", Li Guocheng deliberately shouted loudly, so frightened that Zhou Xiaojuan's hand trembled, and the multimeter fell off.

At this time, Li Guocheng felt a pang in his heart, thinking that the multimeter with special significance was about to be scrapped, Zhang Zhijing stretched out his magical hands and caught it steadily.

The three of them all breathed a sigh of relief, and a certain woman habitually patted her chest again, Li Guocheng was so decent that he didn't look at her squarely.

"Two, hurry up and go about your own business, don't want to Huo Huo's things", Li Guocheng really rushed people.

Zhou Xiaojuan didn't have any eyesight, so she took the multimeter from Zhou Xiaojuan's hand, poured her left and right hands into each other, and looked at Li Guocheng worried.

"Director, what do you say this is? Precious? On the surface, it seems to be very casual, but in fact it is very careful.

"It's a multimeter, much more powerful than that voltmeter, portable, two batteries for a year", copying the fine products of later generations to this era, even if it is a soul in his 40s, Li Guocheng is full of pride in his heart and urgently needs to share.

"So precious", I didn't understand it before, and thought it was just a work of art. But when she heard that it was more advanced than a voltmeter, she was a little numb, but she knew how much the technical department valued the bulky voltmeter. No matter how arrogant she usually is, she has a blind awe of technological products.

She carefully put the multimeter in her hand on the workbench, her heart was loose, her legs were weak, if it weren't for Zhao Zhijing's quick eyes, she would have sat on the ground.

Li Guocheng, who felt a little overplayed, walked to the workbench and picked up the multimeter, "It's okay, it's broken, I'll make another one", and handed it to Zhou Xiaojuan casually after speaking.

was so frightened that she waved her hand again and again, Li Guocheng was also helpless, and he really threw the multimeter on the ground in order to prove it.

After explaining the functions of the multimeter to them, satisfying their curiosity, the laboratory was quiet again.

However, Li Guocheng forgot to tell them, and before noon, an exciting news spread throughout the rolling mill.

"You know what? The laboratory has made an artifact, and foreigners don't have it."

"What an artifact, that's high-tech, high-tech more advanced than semiconductors."

"Oh mom, how much does it cost, is it possible to earn foreign exchange?"

"That can't, how can the high-tech we have worked on with great difficulty be used by foreign devils."

"Yes, only the socialist camp can use it, capitalism is not qualified"

。。。。。。

In the morning, Wu Liankui, the chief of the technical department, contacted Wu Liankui by phone and asked what high-tech the laboratory had made.

After answering a few more calls, Wu Liankui realized that something was wrong. Walking out of the office, I happened to meet Zhou Xiaojuan, and after hearing what was going on, I hurriedly ran to the first assembly laboratory to find Li Guocheng to confirm the situation.

After some introduction, Wu Lian Kuile couldn't see his teeth, so he hurriedly went to Li Huaide to report the good news.

As the party concerned, Li Guocheng was only a little excited at first, and when Wu Liankui found it, his mood was already calm, because he had seen too much real high-tech, and he didn't care much about the simple analog needle multimeter.

Thank you all for your support! Ask for recommendations! Ask for a commuter pass!

(End of chapter)