Chapter 593 What to do if you make welding mistakes repeatedly?
Lecturer Zhang finally realized what was happening: "You mean..."

Gao Zhendong ran away: "Professor Liu is an expert on this matter. He has also eaten the pig-killing meal before. You can just ask him for advice, hahaha."

The students present were all happy. They heard that a classmate of Professor Liu had eaten it once and it was so delicious. They didn’t expect that it would be their turn today.

"Have you eaten the pig-killing meal?" This sentence later gradually became the jargon within Beijing University of Technology, meaning that the thing is done?

Professor Liu also smiled: "Professor Gao, would you like to eat something together?"

"No need to eat. I have something else to do." Gao Zhendong said with a smile. He only comes here one day a week, and this time is very precious to the SZ61 supporting department. Professor Liu also knows it.

Seeing Gao Zhendong was about to leave, Lecturer Zhang remembered something important.

"By the way, Professor Gao, I have something else I want to ask you."

Gao Zhendong stopped and asked, "What's the matter?"

What Lecturer Zhang said had nothing to do with stun grenades: "I want to make an appointment with you to ask you about tear gas. The structure and use of stun grenades are new, but they are still within my previous professional knowledge. However, tear gas is a bit beyond the scope, especially tear gas. I really don't have much experience. The comrades of the Defense Work Committee said that if there are any difficulties, I will come to you for advice."

Wow, Lecturer Zhang is so awesome, he actually took on both of them at once.

Lecturer Zhang has the technical expertise to deal with stun grenades, explosives, magnesium powder and other materials that are closely related to traditional ammunition. However, he is relatively unfamiliar with tear gas, which directly relates to chemistry.

In the proposal forwarded by the National Defense Working Committee, the use of capsaicin was mentioned, but it was vague about how to use it and how to use it. Moreover, the production of capsicum is not large at present, and Beijing is not a major production area or consumption area, so it is difficult to purchase in large quantities.

Lecturer Zhang is interested in researching artificially synthesized chemical tear gas agents, but there is no mention of what to use to replace capsaicin in the proposal.

The Defense Work Committee probably made this suggestion because they knew that this would be somewhat difficult for comrades who only came from ammunition backgrounds.

Gao Zhendong did not refuse. At least he knew what to use.

"Okay, you finish up the current work on the stun bomb and flash bomb. Come to me next Tuesday." Gao Zhendong directly gave a time.
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Gao Zhendong was in his office, tinkering with the circuit board of the IC principle circuit.

This circuit board had been made and sent to him by the Electronic Laboratory of the Third Factory a long time ago, but it was temporarily put aside due to the successful integrated circuit technology at that time, and was only picked up again later.

Factory 1274 acted quickly and had already sent over a batch of SZ61000~61002 chips. This was a special request from Gao Zhendong on the day the IC manufacturing process was successfully completed. This batch of chips would be used on this circuit board.

Naturally, 1274 did not dare to neglect his request, and Chief Engineer Gao's work must not be affected in any way.

Gao Zhendong is soldering the chip on it. Gao Zhendong likes to debug this kind of test circuit by himself, so that he can have the best understanding of the condition of the test materials.

Moreover, during the debugging process, it is inevitable to modify the circuits and fly wires. When someone is asked to do it, it requires explanations, and the circuit boards are passed back and forth, which wastes time.

There are many chips on the circuit board, and the number is not too small. It can be seen that the function of this circuit is somewhat complicated, but it is obviously not as exaggerated as the CPU.

A puff of white smoke rose up, Gao Zhendong let out a long breath, turned the circuit board over and took a look.

then……

"Oh my god, I welded it wrong again." Gao Zhendong cursed.

The three digital circuit chips I have are all from the same mother, and they are identical triplets - all in DIP14 packages.

The DIP package of the SZ61 series is consistent with the DIP package size of Gao Zhendong's previous life. The reason is very simple. It is to keep it consistent with the batch of chips imported earlier and facilitate direct replacement.

If you don't look carefully at the names on the top of the chips, you can't tell the three chips apart; they all look the same.

As a result, the chance of welding errors is higher. Even someone with a brain, eyes and hands as good as Gao Zhendong is bound to make mistakes.

This is normal. In Gao Zhendong's previous life, computers were getting faster and faster, accessories and peripherals were getting more and more advanced, and software was getting more and more bloated and huge, but the bugs in the software did not decrease at all. It's the same principle.

Picking up the pneumatic desoldering machine, Gao Zhendong began to disassemble the chip, cursing as he did so.

Halfway through his scolding, he suddenly thought of a solution. How could he have forgotten about this?

He picked up the phone and called Factory 1274, asking them to organize their own research and development and produce a small device, not only for himself, but also for other comrades who used DIP packaging.

After stating his request, he added: "For this thing, you can consider coordinating the packaging specifications of the SZ61 series chips and make it into a series of matching products." After the call, Gao Zhendong sat down again cursing and continued to disassemble the chip. The thing was good, but distant water could not quench immediate thirst, so it had to be disassembled.

The director of the technical department of Factory 1274 put down the phone with Gao Zhendong, turned around and called a section chief who was in charge of scientific research. After hearing the request, the section chief went back to the office and called a young backbone.

He briefly told the young man Gao Zhendong's intention and drew a simple diagram. What Gao Zhendong wanted was quite simple and the technical content was not high. Even if he repeated it layer by layer, he could restore a schematic diagram.

"This is what Chief Engineer Gao wanted, and it can also be used in other situations in the future. It is a very useful general-purpose device. You must put in your utmost effort and strive for perfection to do a good job in the design and production of this device."

Gao Zhendong only gave the intention and requirements, but the specific detailed design still needs to be completed by Factory 1274.

The young man was very excited. It was self-evident who Chief Engineer Gao was. It was a matter of pride to receive a project from him, no matter how big or small it was.

Because everyone knows that what Chief Engineer Gao is doing, no matter how small and insignificant it may seem when it is done alone, is very likely to be part of a major advanced achievement and is of great significance.

Looking at the sketch, the young man exclaimed: "Chief Engineer Gao is very thoughtful. This thing looks simple, but it can greatly facilitate comrades who use DIP packaging. This simple little invention has greatly improved the work efficiency of relevant comrades."

In the future, this kind of thing can at most be considered a utility model patent, but in this era, it is reasonable to call it an invention.

This device is a general-purpose device commonly used by those who often use DIP packaged components for design and debugging.

——DIP socket.

To put it simply, a socket of the same specifications is used to replace the position where the DIP chip should be soldered, and the real chip is inserted into this socket.

The benefits of this are self-evident. When soldering, you don't have to worry about the specific chip. Just solder the appropriate socket and you can directly plug the corresponding chip into it during assembly.

And the maintenance is also simple. You can just pull out the broken chip. It will not cause derivative damage to the circuit board due to removing the chip. When the solder sucker is too strong or the PCB quality is poor, the solder sucker will lift up the via, pad and copper foil at once. I believe many people have encountered this situation.

Of course, there are disadvantages as well. First, it will increase the cost. Second, with an additional plug-in connection link, the failure rate will naturally increase. Therefore, in equipment that requires large quantities, low costs, and high reliability, the use of DIP sockets will be very restrained.

But for ordinary products with small quantities, the overall benefits are still significant.

"It's a good thing, right? It's simple, right? Why didn't you think of it? It's such a small matter, and Chief Engineer Gao has to spend time and effort to solve it himself. It's really embarrassing!" The section chief couldn't let the young man get cocky, so he decided to give him a warning, even though the warning was somewhat unreasonable.

But the young people didn't care. They were not ashamed to be inferior to Chief Engineer Gao: "Section Chief, didn't you expect it? Haha."

It seems that the relationship among the comrades in the core is very harmonious and the atmosphere is extremely healthy.

The section chief was speechless for a moment: "This...get out of here, get back to work. If you can't do it well, I'll make you pay!"

The young man said seriously: "Make sure to complete the task well!"

Jokes aside, he still understood how important the project from Chief Engineer Gao was. This matter was different from the projects of the department and section. No matter how big or small it was, it would definitely be registered with the leaders of the factory.

If you do a good job, everything will go smoothly. If you don't do a good job, your butt will probably be welded to this bench within five years.

Not to mention that if it is not done well, it will have a negative impact on Chief Engineer Gao’s work, which would be a serious sin.

But the young man was not worried at all. Firstly, this thing was indeed simple. Secondly, he knew that if he had any questions, he could ask Chief Engineer Gao in the factory. Chief Engineer Gao was a man of very strong character and very generous. He never kept anything to himself and would answer any questions.

"The main developer of the DIP series electrical sockets." This title sounds good and the young man is very happy.

When Gao Zhendong and Factory 1274 were each working hard on their latest scientific research projects, two people came to see him one day.

The two men were acquaintances. The leader was Sha Zhu, and with him was the comrade from the Technical Department of the Third Factory who was responsible for cooperating with him.

"Oh, the self-heating rice and the hot packs are here. Come sit down." Gao Zhendong joked.

Although the two things are combined in the same project, there is naturally a division of labor according to different majors. Self-heating food is more the responsibility of Sha Zhu, while self-heating posts are more the responsibility of comrades in the technical department. Gao Zhendong gave them these two nicknames.

The two sat down, and Sha Zhu smiled and said, "Zhendong, I'm here to ask for help."

Gao Zhendong raised his eyebrows: "Oh, that seems to be good news."

(End of this chapter)