Chapter 36: Shazhu's Admiration

Gao Zhendong's idea is to use a voltmeter to display. The output of the thermocouple is in the millivolt level, and it needs to be amplified more than 100 times to drive the voltmeter. It needs to add a tube amplifier circuit. At the same time, the N-type and K-type also need a compensation circuit for cold end temperature compensation, plus the power supply circuit. The whole circuit is not complicated.

Since the output voltage of the thermocouple is nonlinear with the temperature, it is difficult to directly indicate the temperature on the scale of the meter. At that time, there were no components such as microcontrollers, so it was impossible to directly calculate the temperature after collecting the voltage.

Therefore, Gao Zhendong planned to directly display the amplified voltage value, and at the same time adopted a simple and crude method to solve the problem of rapid voltage-temperature conversion at the production site: table lookup method.

To put it simply, the corresponding relationship between voltage and temperature is directly made into a table. When the on-site personnel see the voltage value, they can know the temperature by just glancing at the table.

Gao Zhendong took out the drawing tools and began to draw the circuit schematic. Although he did not have a computer and circuit design software such as Altium Designer, Protel, PADS, and Eagle, and could not directly generate a printed circuit board (PCB) diagram from the circuit schematic and BOM table, Gao Zhendong did not omit the schematic and directly draw the PCB diagram.

After all, when modifications are needed, it is troublesome to directly change the PCB without a schematic diagram, not to mention that the schematic diagram is the most important part of the original design.

The circuit was not complicated. Gao Zhendong drew the schematic diagram and began to draw the PCB manually according to the schematic diagram. Corey had double-sided copper clad laminates, which saved Gao Zhendong from having to spend time on scaffolding the circuit. Although scaffolding had the romance of handwork, it was an outdated technology that was not conducive to product volume, quality control, and mass and standardized production.

When the circuits become more complicated in the future, setting up a shed will be of no use and it can only be used in niche occasions such as HIFI-DIY and electronics enthusiasts.

Gao Zhendong was busy with circuit diagrams and schematics, as well as reviewing Liang's invented electrode repeatability test design until almost the end of the afternoon.

Before leaving get off work, Gao Zhendong wrote the review opinions on the electrode repeatability test design and went to the laboratory to give it to Liang Faming and asked him to revise it before noon the next day.

It's time to get off work, but quite a few people don't leave. The reason is simple: there is work to be done and there is also subsidy.

For those who need to work overtime after get off work, half a day's salary will be subsidized each time. However, to get this subsidy, you have to work from seven to eleven after work. You will not get it if you work one minute less.

For someone like Jia Dongxu, a second-level fitter, the salary is 38.6 yuan, which is about 80 cents for one night.

If the entire scientific research project is completed, the total amount of money will be no small amount, so Gao Zhendong did not dare to ask for more people at the beginning. This is one of the reasons.

Gao Zhendong did not force it. If someone was willing to work overtime, it would not be a bad thing to finish the work early. What was important was to get paid for the work, not to not work overtime.

On the way home, Gao Zhendong felt that he had used his brain too much today and needed a good meal. So he weighed half a pound of meat and half a pig's stomach. When he got home, he put the things in the storage room and it became one pound of meat and one pig's stomach. He asked Sha Zhu to prepare a good meal for him because he had worked hard today.

There's no other way. Gao Zhendong's cooking skills are just edible. There's a chef in the yard, so it would be a waste not to use him.

Just as he was carrying the things to Shazhu's door, He Yushui jumped out of his room and said, "Brother Zhendong, Brother Zhendong, what's the good news? You're here to ask my brother to make food again."

Gao Zhendong took out two peanut candies from his pocket and handed them to her: "It's nothing good, I just want to admire your brother's cooking skills, haha."

He Yushui cheered, thanked Gao Zhendong, and went back to her room to enjoy herself.

Sha Zhu heard the noise and came out. He had just returned home and was putting a small lunch box into the cupboard. When he saw Gao Zhendong carrying something, he knew that he had come to ask him to cook again.

But he didn't dislike it, he was quite happy. First, he regarded Gao Zhendong as a friend, he was willing to cook for his friend, second, every time he cooked, Gao Zhendong prepared enough food, whenever it was convenient, he would ask him and Yu Shui to eat together, Yu Shui had eaten many times. Suddenly, Sha Zhu felt that the small lunch box was not delicious, what he could eat every time depended on luck, today no one cooked a small meal, what he brought back was a big pot of food, which was incomparable to what Gao Zhendong had.

So Sha Zhu threw the lunch box into the cupboard, put on an apron, and started cooking.

Hearing the sound of Sha Zhu chopping vegetables, Gao Zhendong thought of his radio and phonograph: "Sha Zhu, take some out to the deaf old lady in the backyard when they're done. Bring the rest directly to my place. We can eat while listening to the radio."

Only then did Sha Zhu realize that Gao Zhendong had fixed his radio. He had been making fun of Gao Zhendong for buying a wooden box for 45 yuan. "You finally fixed that thing? OK, I'll bring it over later."

He Yushui got interested when she heard this: "Brother Zhendong, I want to listen to the radio. Brother, you cook for yourself. I'll go to Brother Zhendong's place to listen to the radio show."

When Sha Zhu heard this, he was unhappy: "Hey, hey, hey, why don't you stay and help me? Don't blame me if dinner is late."

He Yushui didn't hear it and ran away to Gao Zhendong's side. Gao Zhendong had no choice but to follow him to open the door for him, leaving Sha Zhu alone to work.

He Yushui was listening to the radio, and Gao Zhendong started to tinker with the ESR materials again. He took some time to go back to school and ask teachers of other majors for the metallurgy textbooks. He took the textbooks and read the ESR materials, and felt that he had gained a lot.

Not long after, Sha Zhu came over with hot meals.

The radio was playing the evening news. In the warm room, the food was steaming. It was already late autumn in October. The temperature outside had dropped. There was a faint sound of wind, which made the room even more comfortable. Sha Zhu toasted Gao Zhendong: "You have a comfortable life. You listen to songs, drink wine, and work smoothly. All you need is a wife."

The words "I lack a wife" silenced Gao Zhendong. He still had no girlfriend in his senior year. He wore it again and again, went to the war, and after the war, went back to school. However, when he was in school, his classmates were enthusiastic about building the motherland and the learning atmosphere was too strong to be separated from it, but he still didn't succeed in dating.

Thinking of this, Gao Zhendong was shocked: "Oh no, I am not the reincarnation of Jin Chanzi."

He was amused by his own thoughts, and shook his head with a chuckle: "Don't talk about this. When it comes to this, we are the same. You are 24 years old, right? Is Yu Shui's sister-in-law still flying in the sky?"

This time it was Shazhu's turn to feel bad. He would brag, "You don't know, I just don't like her. If there are girls chasing me, they can line up from here to Dongzhimen."

Gao Zhendong asked casually: "Just brag. Honestly, what kind of one do you want?"

Sha Zhu took a sip of wine and fell into longing: "Pretty, slim, family-oriented, good-tempered, able to bear children, with a registered permanent residence and a job."

Listen, this was before he had experienced the harsh reality, before he became obsessed with Qin Jingru in the future. At that time, he didn't care about household registration or work.

Gao Zhendong turned around and thought, isn't this Qin Huairu who replaced Jia Dongxu's job? It turns out that the roots have been here for a long time. The problem is that you can give birth but you didn't make it clear whether it is your own child.

Gao Zhendong raised his glass and drank a glass himself: "Well, you should stay single."

(End of this chapter)