Because I just informed the canteen today, there is no stir-fry in the laboratory for the time being, so I can only go to the canteen to eat by myself.

There were no dishes in this season, only potatoes and Chinese cabbage, and Li Guocheng had a dinner with clear soup and little water.

During the whole process, Li Guocheng ate quickly, and the workers who ate around him always pointed at him, and he knew why without listening. It seems that the second daughter is still too idle.

When I returned to the laboratory, I saw that Yan Jiefang was still busy, so I walked over and looked at it, and it was already finished, but it was still being confirmed repeatedly.

"Okay, you go back, I'll do the rest by myself", Yan Jiefang hasn't eaten yet, let him get off work early.

"Brother Li, I want to stay and watch you install", although the voice was not loud, but it was very firm. It seems that he listened to today's words.

Li Guocheng didn't speak, and nodded.

Yan Jiefang was overjoyed, and hurriedly filled Li Guocheng's teacup with hot water and brought it respectfully.

Next, the final assembly began, because it was the second unit, Li Guocheng was familiar with it, and the assembly was completed in less than half an hour. The whole process still let Yan Jiefang record while watching.

"The newly assembled multimeter, the measurement data is inaccurate, and it needs to be calibrated", and then it is another calibration process, if it is not necessary to take care of Yan Jiefang, this calibration time is at least twice as fast.

Yan Jiefang held the newly assembled multimeter, and felt as if he had also participated in the entire assembly process, and he rarely wanted it.

"Okay, hurry up and go home, in the future, the multimeter will be handed over to you for production, assembly and research, and then you will be able to vomit," Li Guocheng teased.

"How is that possible?! I can do such a high-tech job for a lifetime", Yan Jiefang's eyes were full of determination.

Li Guocheng was noncommittal, just smiled and said secretly: "I'm still young."

The next day, the second daughter came to the first assembly laboratory early without knowing whether she was alive or dead.

"Zhang Zhijing, now that chip manufacturing is stuck on photoresist, you have to speed up the progress. Zhou Xiaojuan, our chip has been developed, and we will wait for your circuit board at that time, you can have a snack", Li Guocheng said seriously.

The second daughter knew that this was Li Guocheng's revenge, but they didn't dare to say more, and after agreeing, the two left the laboratory with a chatter.

They don't know why, they have been very open in front of Li Guocheng before, but since yesterday they learned the value of a multimeter and listened to a high-tech knowledge class on lithography and etching. They couldn't help but deify Li Guocheng in their hearts, and subconsciously regarded him as an extremely powerful teacher.

Not to mention the invention of so many new devices before, especially semiconductors, which is an area that they don't understand at all. In such a field, they can actually participate in it, and that sense of accomplishment and pride makes them subconsciously willing to obey Li Guocheng.

With the multimeter, the next step is to design the radio, the circuit diagram and the three-dimensional layout diagram have long been imprinted in his mind, Li Guocheng re-checked, took out the epoxy resin board and began to reproduce the circuit.

The next work is very simple, insert components, dispense, weld, wire, and in less than an hour, all are done.

With a multimeter, it's convenient. Before checking whether there is a short circuit, it is necessary to check one wire at a time, which is very laborious. Now it's okay, measure with a multimeter, that is, more than 50 points, and it will be done in no time.

If you want to do something, you must first sharpen your tools, and the ancients were honest and did not deceive me.

"Do you want to get the oscilloscope out", Li Guocheng has begun to let himself go, forget it, it's too complicated, and it doesn't have the conditions yet.

Install the battery, turn on the switch, turn on the knob to adjust the platform, and soon the song "Red Plum Zan" came out of the speaker, the background noise is a bit big, and the song is mixed with rustling sounds.

The receiving circuit is very simple, with only a transformer and adjustable capacitors, and generally does not introduce noise. Disconnect the receiving circuit, divide the voltage directly with the resistor, and input a weak voltage to the buffer circuit.

Adjust the multimeter to the DC gear, measure one level at a time, adjust the parameters as long as there is a fluctuation until the satisfactory stability is reached, and there is no drift in the three-stage amplification circuit.

Reconnected the receiving circuit, turned on the switch, adjusted the channel, and the song actually became "Return from Target Shooting", Li Guocheng carefully perceived it, the sound was very clear, and the degree of restoration was very good.

The sound of songs coming from the laboratory attracted the second daughter, Yan Jiefang had already looked stupid, but he was watching the whole process, watching Li Guocheng's movements with ease, Yan Jiefang was completely numb. "God-man, please take my knees," he cried inwardly.

The second daughter learned to be obedient this time, and she didn't dare to touch the radio, but just listened to the music quietly around the table.

The current radio is completely naked, and the circuit boards, knobs and horns are thrown on the table at will, which is too ugly in the eyes of Li Guocheng.

But as the three people of this era, this is the first time they have seen the internal structure of the radio, a bunch of extremely ugly devices, and in their eyes, it is so charming that they can't wait to reach out and touch it.

Seeing their eagerness, Li Guocheng smiled, "This is the tuning knob, this is the tuning knob, be careful to tune, don't move the circuit board."

Hearing Li Guocheng's voice, the three of them immediately rushed to play, but they were all cautious and did not dare to use too much force, for fear of damaging the radio.

At this time, Li Guocheng began to carve the radio shell again, and the material was also ordinary elm wood from the laboratory.

However, with Li Guocheng's vision and carving skills, after polishing, even if it is not painted, the whole appearance makes people feel high-end, atmospheric, and high-grade at a glance. Compared with the radios on the market today, it is simply the difference between a noblewoman and a beggar.

Interrupting their play, Li Guocheng assembled the radio in the surprised eyes of the three of them. At this time, it is completely a work of art. Even Li Guocheng, the initiator, was also amazed.

Li Guocheng handed it to the three people, and they waved their hands again and again, not daring to fiddle with the assembled radio anymore.

Their performance made Li Guocheng's vanity the greatest satisfaction. At Li Guocheng's insistence, they actually washed their hands with soap together before picking up the radio and fiddling with it.

Unbeknownst to them, the radio was later presented to the leaders of friendly countries as a state guest gift.

It is difficult to find a machine on the market, not because of how advanced the circuit is, but because of the appearance, blessed with modern aesthetic design and Li Guocheng's master carving, which makes this radio a legend.

In order not to affect Li Guocheng's research and development work, less than 100 radios are produced every year.

Li Guocheng didn't expect that the first thing he was sought after by everyone was not semiconductor technology, but carving, which made Li Guocheng cry and laugh.

Of course, the biggest reason is that Mr. Zhao's protection of Li Guocheng has led to only a few people knowing Li Guocheng's semiconductor technology capabilities.

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

(End of chapter)