On a single-chip comprehensive experimental bench, Zhou Xing found the design drawing of a semi-finished product.
According to the product design requirements on the drawing, Zhou Xing tried to complete it.
"The second pin should be set at this position to avoid interference."
"No, there is something wrong with this circuit. It will be short-circuited! There should be a capacitor added here. Well, perfect, this circuit is connected."
"The circuit of this control module should go like this, ha, the embedding was successful!"
“…”
Unconsciously, Zhou Xing devoted himself wholeheartedly to the design of the circuit diagram, forgetting the passage of time and ignoring everything around him.
Time passed bit by bit, and Zhou Xing stood in front of the experimental table, writing and drawing on the design drawings, gradually improving the design of the product design drawings.
"Well, there seems to be something wrong here?" Zhou Xing frowned. Looking at the design drawings that were about to be completed, he noticed something was wrong, but he couldn't find the problem.
"Ahem, there's something wrong with the frequency dividing module. That circuit needs to be modified." A voice suddenly reminded behind Zhou Xing:
"Yes, that's right, it's a problem here. This circuit needs to be connected." Zhou Xing was overjoyed. After being reminded like this, he immediately discovered the problem:
"Uncle Liu, you're here!" Zhou Xing changed the circuit diagram, turned around and greeted:
"Well, I've been standing for half an hour! I watched you finish 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.
Zhou Xing was stunned, looked at Liu Qiang, and said unhappily: "Uncle Liu, my hands were itchy and I touched your design! I..."
"It doesn't matter, you did a good job. You have a good foundation, careful thinking, and good drawing design, otherwise I would have interrupted you." Liu Qiang waved his hand, interrupting Zhou Xing and said:
"However, perhaps due to experience, this design drawing still has some shortcomings." When Zhou Xing was about to express his thanks, Liu Qiang suddenly continued:
"Uncle Liu, what's the problem?" Zhou Xing stared and asked in confusion:
Liu Qiang smiled slightly, picked up a pen and drew a circle in two places on the design.
Liu Qiang pointed to a small circle circuit diagram 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 expression changed slightly, his eyes fixed on the location pointed by Liu Qiang, his mind raced, and he started thinking crazily.
"Uncle Liu, is it because the power supply circuit uses discrete component circuits?" Zhou Xing looked up at Liu Qiang and asked:
The boy is teachable and so smart!
Liu Qiang looked at Zhou Xing with satisfaction and sighed in his heart.
"Yes, there are many things to pay attention to when designing a circuit: When designing a circuit, you should try to reduce the number of components and try to use integrated circuit design. For high-power devices, you should pay attention to heat dissipation issues. You should also 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 is any problem!" Zhou Xing took a deep breath and asked unconvinced:
Doing two things at once, Zhou Xing thought over both questions. The first circled area made sense, but the second circled area didn't make sense. It was obviously no problem!
Liu Qiang smiled slightly and explained: "If this circuit is designed like this, the overall cost will be higher! Xiaoxing, we are a factory. If the cost of designing a circuit board is a few cents more, then after conversion, we The profit will be reduced by hundreds of thousands!"
Hearing this, Zhou Xing was stunned for a moment, not expecting this to be the reason.
"Okay! Uncle Liu, I have some questions to ask you!" Zhou Xing nodded understandingly and changed the subject without delay:
"Okay, you can ask!" Liu Qiang smiled and nodded:
"Before, I used the 89S51 chip to do experiments on the development board. The program was written normally, but the work was not normal. Phenomenon: When doing the inversion experiment on the P1.0 port, the LED was not normal. Why is this?" Zhou Xing asked curiously:
"There is a problem with the timer setting. Is the timer interrupt flag cleared?" Liu Qiang explained the reason in one breath:
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. There is no problem in storing data for the first time, but if I store it for the second time, the data stored for the first time will be lost." Something goes wrong and I can't find the reason..."
"There must be a bug in the program you wrote. Write the program for me to take a look at." 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 bunch of program code 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 confusedly:
Hearing this, Zhou Xing was stunned for a moment and shook his head.
"I'll try it next time, Uncle Liu, I have another question..." Zhou Xing skipped the 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 could not refuse and answered Zhou Xing's questions again and again.
The two of them asked and answered questions, and before they knew it, more than an hour had passed.
With a "rumble", the closed glass door of the laboratory suddenly opened on its own, and Liu Qiang, who was mentally exhausted, ran out of the laboratory as if he was running away.
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 throbbing.
"Brother Qiang? What's wrong with you? This water..." Zhou Wenhai, who was correcting documents, couldn't help but be stunned. He had drank this water!
"Wow! I almost died of thirst!" Liu Qiang drank all the water in the water glass and shouted with satisfaction:
"What can I do? He's not your precious son yet. Take him back quickly!" Liu Qiang glared at Zhou Wenhai and said angrily:
"Xiao Xing? What's wrong with Xiao Xing? Did he get into trouble again?" Zhou Wenhai was taken aback and asked anxiously:
Why use the word "again"! Xiaoxing seems to have not been in trouble for a long time! Zhou Wenhai suddenly felt nostalgic.
"Xiao Xing didn't cause any trouble, it's just..." Liu Qiang looked embarrassed, a little hard to say.
"That's fine if you didn't cause any trouble, but what?" Zhou Wenhai breathed a sigh of relief and asked blankly:
For more than an hour in the laboratory just now, Zhou Xing asked one question, then another, and asked questions endlessly. In order to answer his questions, he didn't even have time to take a breath. It would cost his life!
If Zhou Xing was asking questions related to the development of microcontrollers, Liu Qiang could at least cope with it. But later on, the boy actually asked questions about other electronic fields, such as: electronic communications, automation, information engineering, electrical control... etc., in the electronic field. The problem is that it's too bullying. How about someone like him, who can learn so much knowledge in so many fields at once, and his knowledge is still very solid.