Fu Xin pointed to the two pictures he had drawn, and said to Xiao Hei Zhang Integration: "Figure 1 is a kind of infrared remote control transmission circuit, in which a piece of IC1 high-speed CMOS type 4-2 input "and" gate 74HC00 integrated circuit is used to form a low-frequency oscillator as the coding signal (F1), and the IC2555 circuit is used as the carrier oscillator, the oscillation frequency is: F0 (38KHz) F1 modulates the "F0", so the 3-pin waveform of IC2 is an intermittent carrier. This carrier is sent into space via an infrared light-emitting diode. The waveforms of key points A, B1, and B2 in the circuit are shown in Figure 2, where B2 is the unmodulated waveform.

In Figure 1, the 555 circuit is selected as the carrier oscillator, and its purpose is to illustrate the modulation working principle of the circuit, that is, the familiar 555 is used to generate a 38kHz square wave signal, and then the 4 pins of the reset terminal of 555 are used as the modulation terminal, that is, when the 4 pins are high, 555 is a conventional square wave oscillator; When pin 4 is low, pin 3 of the 555 is low. The 4-pin modulated signal is obtained by the IC1 NAND gate LFO oscillator.

In practice, the transmitter is powered by a 3V battery, so just replace the remaining two 38kHz of the 555 circuit IC1 with NAND gates, as you see in Figure 2. ”

Xiao Hei pinched his chin and thought about it carefully, pointed to the picture and asked, "Why don't you quote the encoder and carrier generator in the circuit of the CD4011 in Figure 1 of the "NOT" gate of CMOS4-2 input here?" ”

Fu Xin explained: "The encoder and carrier generator in the CD4011 Figure 1 circuit of the CMOS4-2 input "NOT" gate are not referenced here because CD4011 oscillates to generate a square wave signal, which is an analog signal application. You think, in order to ensure the reliable vibration of the circuit, its working voltage needs to be more than 4.5V, and the minimum working voltage of the CMOS integrated circuit of 74HC00 is 2V, so the use of 3V power supply can work reliably. ”

Fu Xin nodded approvingly, but he still had some doubts about the two pictures drawn by Fu Xin, but he was confident that he could figure it out on his own, so he didn't bring it up.

"Don't talk about it, come and eat, I didn't know to help my old man when I was cooking, I just knew to sit aside and wait for food." Lao Dao complained.

"Master, I was asking Senior Brother a question, so I ......," Xiao Hei said embarrassedly.

Lao Dao waved his hand, and said nonchalantly: "Okay, okay!" Come and eat! You don't have to blame yourself, you brothers and sisters can communicate with each other, which can promote the relationship between you. ”

The old Taoist asked Fu Xin: "Fu Xin, tomorrow I will go to live in your factory with Xiao Hei, I will teach him to practice every morning and teach him lessons at night, do you have any spare rooms?" ”

Fu Xin nodded and said, "No problem!" It's better if you live there all the time, you live alone in this temple, I'm not at ease! If there's a little problem or something like that, and no one knows, it's going to be a problem! ”

Lao Dao waved his hand and said, "Okay! Let's eat! I haven't been sick for decades, and you say so much, do you want to curse me for being sick? ”

Fu Xin still didn't give up, he always wanted to take the old road down the mountain, "But there are few people around here, I'm afraid of ......"

Xiao Hei will not cringe at people who are familiar with him, he is already familiar with Fu Xin, and then suddenly interjected, "Senior brother, you can rest assured, Master, his old man lives on this mountain, it's fine, let's take a walk and take a look!" Master is old, and he can't bear this land that he has lived on for many years, which is normal! ”

Xiao Hei clearly knows the identity of Li Laodao, Li Laodao is here, it is not that no one comes, but those people come when no one comes, so he is very relieved that Lao Dao lives here alone. Xiao Hei even guessed that maybe there were people hiding in some corner of this Taoist temple.

Fu Xin didn't have any doubts about Xiao Hei's words, but he thought that he and this Xiao Hei were busy with work, and they might not be in Yicheng, so it was unrealistic to come often, so he still didn't give up, and said: "When do I go to the village below the mountain to find someone, I will pay him and ask him to come to the mountain every day to take a look, and by the way, ask him to send Master your food, clothing, housing and other supplies over regularly." ”

"Haven't I become a labor exploiter, don't do it!" Lao Dao immediately sternly refused, although he knew that this was Fu Xin's kindness.

Fu Xin really got into trouble with Lao Dao this time, and he didn't listen to Lao Dao's words, but said: "Let's talk about this later, anyway, Master, you are going to go down the mountain to live for a year and a half, didn't you teach me last time I didn't live in the house of the unknown uncle for more than half a year?" When you get back, we'll talk about it! Now eat first. This big bowl of braised pork is wasted if you don't eat. ”

Last time he wanted to come back, Fu Xin refused to live or die, and in the end, he took advantage of Fu Xin to go to work, and he left alone, so Lao Dao knew that Fu Xin was a little embarrassed about this matter, and he didn't speak, greeted Xiao Hei, and ate silently.

Xiao Hei has been salivating for the braised pork on the table for a long time, he has not eaten for more than a day, and his stomach is already very hungry, and now this is the braised pork that he has rarely seen in a few years.

Fu Xin and Lao Dao ate very gentlely, and the two of them also opened a bottle of liquor, leisurely, as if they didn't see Xiao Hei who was gobbling up next to them.

"Oh, by the way, Fu Xin, you can stay here tonight. Tomorrow morning, in addition to the liquor, you bring back the firewood, rice, oil and salt you brought today, as well as the rice, oil and salt that I have left here, and it will be bad if you put it here. "Just because someone is here doesn't mean that these details don't need to be dealt with," Lao Dao said suddenly.

Fu Xin was a little distressed, yes, when he moved in before, why didn't he take this into account, he had to run errands early tomorrow morning, even if he had great strength and ability, he was also distressed and depressed about this kind of busy work!

There was nothing to say all night, and early the next morning, Fu Xin drove with these things, as well as Lao Dao and Xiao Hei, who he dragged with Lao Dao, towards the direction of Huaxing Electronics Factory.

It's also okay that Fu Xin is now working for himself, after settling down Lao Dao and Xiao Hei Zhang Cheng, he can also arrange for himself to go home and take a bath, last night plus this morning's errands, he already has white salt on his clothes after drying.

"Master, you and your brother will stay here, and I'll go home and take a shower. Xiao Hei, you will first familiarize yourself with the environment, and you will start working in a few days, so you are not in a hurry. I'm leaving, you take care of Master! "Get everything right, it's already past nine o'clock, Fu Xin said goodbye. After speaking, Fu Xin walked towards his car.

……

"Director Fu, there is a customer response, our tape recorder, electronic components are not good enough, backward!" As soon as Fu Xin sat down in the company, An Shuishui chased after him.

Fu Xin put down his car keys, threw them in the drawer, and then asked An Shuishui: "What's not a good way, you talk about it carefully." ”

An Shuishui took out his notebook, according to the above content, and said: "This mainly appears on our audiophile-type tape recorder, it may be that some customers have disassembled our products to study, and they found that the quality of our electronic components is not good enough, and they have not kept up with the changes in the market, and they are a little behind." ”

Fu Xin nodded, simply wrote down these contents in his notebook, and then said: "Tell me the reason for this situation, I believe that you have investigated the cause of the incident before you came." ”

"Hmm!" An Shuishui nodded and said, "Yes!" Before I came back, I had already done a general investigation, asked the workers, and learned from Director Lu that the reason for this problem in our products was the components produced by Xunyang Electronics Factory. Resistors, capacitors, inductors, and potentiometers all have problems, of which the problem of potentiometers is slightly smaller, and the problems of capacitors are the largest. ”

"In this case, is it because the technology of Xunyang Electronics Factory is not good, or they are mixing defective products into it." Fu Xin asked.

On the side of Xunyang Electronics Factory, the position of factory director is Fu Xin, but Fu Xin does not often stay there, so now Xunyang Electronics Factory is mainly staring at Mr. Huang, Lao Ji, and Wen Su, but with the character of the three of them, there should be no such defective products!

An Shuishui did not hesitate, and said directly: "It's not that there is a problem with defective products, but that the technology of the Xunyang plant is really not good, and it is a little backward, plus the equipment of the Xunyang plant is a little backward." ”

"Technical problems......" Fu Xin pursed his lips and thought about it, and said: "In this way, you notify the Xunyang factory to temporarily reduce production." In addition, on our side, Huaxing Electronics Factory should not use the components produced by the Xunyang factory to produce tape recorders, and the components produced by the Xunyang factory should find another buyer. Our Huaxing Electronics Factory will spend more money and buy it from the outside for the time being! ”

An Shuishui was a little anxious, and said: "No, Director Fu, there is no problem on our side." Even a temporary reduction in production is no problem, because the workers believe in you. But at the Xunyang factory, if the production is hastily reduced, I am afraid that the hearts of the workers will be unstable! After all, they have just joined our Huaxing industry, and the hearts of the workers have not been completely stabilized. ”

Fu Xin thought about it, knocked on the table with a pen, and then said, "Okay! Don't worry about the Xunyang factory for the time being, I'll go to Xunyang tomorrow to take a look, see if there is any hope for improving technology and quality, if there is, I will ask the army to start studying it immediately! You can discuss with Lao Mo and Secretary Zhang and deal with the production on our side! ”

"By the way, let me tell you a good news, I had an extra junior brother yesterday, and my junior brother is a master of integrated circuits. He is now living in the dormitory area of the factory and will come to work in a few days, which means that we have another talent in the factory, and you can go and tell other people. Fu Xin said with a smile.

An Shuishui immediately patted his ass and said: "Director Fu, you are so powerful, you can find a talent if you go to see the master!" ”

Fu Xin laughed, he was also very satisfied with this, he went to see the master on a whim yesterday, and he also picked up a talented junior brother to come back! It's so profitable! (To be continued.) )