I am a great scientist

Chapter 41 One more question

On a single-chip comprehensive experimental platform, Zhou Xing found a semi-finished product design.

According to the product design requirements on the drawings, Zhou Xing tried to complete it.

"The second pin should be set at this position to avoid interference."

"No, there is a problem with this circuit, it will be short-circuited! A capacitor should be added here, um, perfect, this circuit is connected."

"The circuit of this control module should go like this, ha, the embedding is successful!"

"..."

Before he knew it, Zhou Xing devoted himself wholeheartedly to the design of the circuit diagram, forgetting the passage of time and ignoring everything around him.

As time passed bit by bit, Zhou Xing stood in front of the test bench, writing and drawing on the design drawings, and gradually perfected the design of the product design drawings.

"Well, there seems to be something wrong here?" Zhou Xing frowned, looking at the design drawing that was about to be completed, he found something wrong, but he couldn't find the problem.

"Cough, there is a problem with the frequency division module, and that circuit needs to be changed." A voice suddenly reminded Zhou Xing behind him:
"Yes, that's right, it's the problem here. This circuit needs to be connected." Zhou Xing was overjoyed. After such a reminder, he immediately discovered the problem:
"Uncle Liu, you are here!" Zhou Xing changed the circuit diagram, turned around and greeted:

"Well, I've been standing there for half an hour! I watched you finish drawing it!" Liu Qiang looked at Zhou Xing with a complicated expression, nodded and said:

Zhou Xing glanced at the electronic wall clock, and before he knew it, almost an hour had passed.

Suddenly, Zhou Xing looked at Liu Qiang, and said embarrassedly: "Uncle Liu, my hands were itchy for a while, and I moved your design! I..."

"It's okay, you did a good job. Your foundation is very good, your thinking is meticulous, and your blueprints are designed well, otherwise I would have interrupted you." Liu Qiang waved his hand and interrupted Zhou Xing:
"However, maybe due to experience, there are still some shortcomings in this design drawing." Zhou Xing was about to express his gratitude, but Liu Qiang suddenly continued:
"Uncle Liu, what's the problem?" Zhou Xing stared and asked in puzzlement:

Liu Qiang smiled slightly, picked up a pen and drew a circle on each of the two places on the design drawing.

Liu Qiang pointed to a circuit diagram in a small circle and explained to Zhou Xing: "The circuit design of this power supply module is unreasonable, which will increase energy consumption and affect the overall performance!"

Hearing this, Zhou Xing's complexion changed slightly, his eyes fixed on the position pointed by Liu Qiang, his brain turned sharply, and he began to think crazily.

"Uncle Liu, is it because the power supply circuit uses discrete components?" Zhou Xing looked up at Liu Qiang and asked:
Children can be taught, so smart!
Liu Qiang looked at Zhou Xing with satisfaction, and sighed in his heart.

"That's right, there are many things to pay attention to when designing circuits: when designing circuits, minimize the number of components, try to use integrated circuit design, pay attention to heat dissipation for high-power devices, and share signal sources internally and externally. Add isolation level,..." Liu Qiang answered Zhou Xing in detail:

"Well, I understand, what's the problem with the other place! I don't think there's any problem!" Zhou Xing took a deep breath and asked a little unconvinced:

Focusing on dual purposes, Zhou Xing thought about both problems. The problem in the first circle can be explained, but the second circle is unreasonable. It is obviously no problem!
Liu Qiang smiled slightly and explained: "If this circuit is designed in this way, the overall cost will be higher! Xiaoxing, we run a factory. If the cost of a circuit board design is a few cents more, then in conversion, we will The profit will be reduced by 10,000+!"

Hearing this, Zhou Xing was slightly stunned, not expecting this to be the reason.

"Okay! Uncle Liu, I have some questions for you to ask!" Zhou Xing nodded in understanding, and changed the subject without delay:

"Okay, you can ask!" Liu Qiang nodded with a smile:

"Before, I used the 89S51 chip to do experiments on the development board. The program was written normally, but the work was not normal. The phenomenon: the P1.0 port was tested for inversion, and the LED was not normal. Why is this?" Zhou Xing asked:
"There is a problem with the timer setting, is the timer interrupt flag cleared?" Liu Qiang explained the reason in one go:

Zhou Xing's eyes lit up, and he immediately understood the reason, and continued to ask: "Uncle Liu, I use IO to simulate I2C to store data, and the first time the data is stored is fine, but if the second time is stored, the data stored in the first time It's going to go wrong, and I've never been able to find out why,  …"

"There must be a bug in the program you wrote, write the program for me to have a look." Liu Qiang frowned, handed the pen to Zhou Xing and said:
"Okay!" Zhou Xing took the pen, brushed it a few times, and quickly wrote a series of program codes on the paper.

"The program is correct. Did you connect the wrong port during the experiment?" Liu Qiang stared at the program written by Zhou Xing, thought for a long time, and asked inexplicably:

Hearing this, Zhou Xing was slightly stunned and shook his head.

"I'll try again next time, Uncle Liu, there is one more question..." Zhou Xing skipped this question and continued, asking:
"Well, tell me!" Liu Qiang nodded helplessly:

"The problem is this, I experiment..."

Looking at Zhou Xing's eyes full of curiosity, Liu Qiang couldn't refuse, and answered Zhou Xing's questions again and again.

The two asked and answered, and before they knew it, more than an hour passed.

With a sound of "rumble", the closed glass door of the laboratory suddenly opened by itself, and Liu Qiang, who was listless, ran out of the laboratory as if escaping.

Liu Qiang trotted all the way to Zhou Wenhai's office, picked up the water glass on the desk and poured it into his mouth, his throat throbbed,
"Brother Qiang? What's the matter with you? This water..." Zhou Wenhai, who was correcting the document, couldn't help being stunned. He drank this water!

"Wow! I almost died of thirst!" Liu Qiang drank all the water in the glass and yelled contentedly:
"What can I do? It's not your precious son yet, take him back quickly!" Liu Qiang glared at Zhou Wenhai angrily, and said angrily:

"Xiaoxing? What's wrong with Xiaoxing? Has he gotten into trouble again?" Zhou Wenhai was taken aback and asked urgently:
Why use the word "again"!Xiaoxing seems to have been in trouble for a long time!Zhou Wenhai suddenly felt nostalgic.

"Xiaoxing didn't cause trouble, it's just..." Liu Qiang showed embarrassment, a little hard to say.

"It's fine if you don't cause trouble, but what is it?" Zhou Wenhai breathed a sigh of relief and asked blankly:
In the more than an hour in the laboratory just now, Zhou Xing asked one question, and another question, and asked endlessly. In order to answer his questions, he didn't even have time to catch his breath.
If Zhou Xing’s questions were all related to the development of single-chip microcomputers, Liu Qiang could at least barely deal with them. Then, later on, the boy actually asked questions about other electronic fields, such as: electronic communication, automation, information engineering, electrical control, etc., Questions in the electronic field are too bullying, so there are people like him who can learn so many fields of knowledge at once, and the knowledge is still very solid.

(End of this chapter)