Suddenly, Cao Jianli's words stopped, and a strange gaze floated in her eyes, and this gaze was immediately captured by Qin Zhenhua.

Two people dressed in grassland costumes, are driving a large number of sheep, herding sheep from a distance, they are all riding on horseback, still very calm, but years of life on the grassland, has made the two of them a little haggard, their faces are a little black because they are often exposed to the sun, and there are already white hair on their foreheads, but the outline, that appearance, can vaguely correspond to something in memory.

At this moment, Cao Jianli's breathing became rapid, but in just a few seconds, she readjusted her mood.

"Erzhuzi, is this home?" Cao Jianli asked.

"Yes, I grew up on the prairie, and this is my home." Wang Erzhu said: "We grassland people are migrating with the pasture at any time, and our family also has no fixed residence, in fact, I have always wanted to take my family to the grassland city to live a quiet life, but my family just refused." ”

Wang Erzhu introduced to Cao Jianli and Wang Limin, and when he heard his words, Wang Dazhu said on the side: "We grassland people have liked this prairie all our lives. ”

While speaking, Wang Erzhu's mother had already come over on horseback, and she happened to greet everyone next to the grassland bag, this grassland woman named Qi Muge, with a smile on her face: "I saw this car coming towards us from a distance, and I knew that Erzhu was back, everyone please come in." ”

As he spoke, he lifted the curtain of the grassland bag and beckoned everyone to come in, because of the relationship between Wang Erzhu, they had learned to speak fluent Chinese.

In the past, when entertaining foreign guests, they chose the location in Wang Erzhu's home, and in the past few years, they have also attached great importance to this matter. Entertain everyone according to the customs of the steppe.

And now, she greeted everyone with a smile, and then, when she saw Cao Jianli, there seemed to be a trace of doubt in her eyes, and in her memory, what happened more than 20 years ago seemed to appear in her mind again.

"Hello, I'm sorry for the trouble." Cao Jianli greeted Qi Muge with a smile, and in her smile, she couldn't see any memories of the past, so Qi Muge put this matter behind her mind, and said with a smile: "No trouble, no trouble, the guests from the first machine factory are the guests of our two pillars." ”

The group entered the grassland bag, and when they entered, Wang Limin immediately sighed: "Not bad, there is a TV in here!" ”

The grassland bag is relatively large, and in the corner next to the door, Professor Wang Limin looked at the fourteen-inch TV in surprise and was amazed.

"Yes, we grassland people, we usually don't have any entertainment activities, so, the year before last, I bought a TV set for my family, so I can learn about national events or something, and I can only watch our central set of programs and grassland city programs through the UHF frequency band, but it is enough."

"Yes, we can often see the news of a machine factory on TV." Qi Muge said with a smile: "Once, I also saw Erzhuzi, and at that time, I and his father and brother were very happy. ”

As he spoke, he turned on the fire and began to make milk tea.

Outside, the cry of sheep sounded, and Wang Batu drove the sheep into the sheepfold, and together with Wang Dazhu, he killed the sheep and made roast sheep.

Wang Limin is very interested in this TV set, in the grassland, the most important thing is that there is no electricity, how to solve this power supply problem?

Look at the overhead, in the center of this grassland bag, there is also an electric light bulb.

But soon, you can find the answer along the wire, right over there, there are two batteries, connected through an inverter, the inverter also has the function of charging, there are wires, connected to the outside.

Seeing that Wang Limin was more interested in this, Wang Erzhu introduced: "This is all made by Brother Zhenhua under the guidance of me to find information, and then made it myself." We have a strong wind on the grassland, so we support a wind turbine outside, flush the electricity into the battery, and supply it for home use, this electric light is also safe to use, don't worry about fire, the control circuit inside, I spent a lot of effort, originally wanted to make a simple one, but, Brother Zhenhua said to test me, let me do a little more advanced, before and after, tossed my spare time for a month, and at the same time, it also cost me a month's basic salary..."

After hearing this, Wang Limin's heart was already pounding, he took out a key from his pocket, and began to poke the screws on it with the tip of the key. ”

It's the mid-80s, and it's hard to see inverters, but regulators are easy to see, and many of the regulators in this era still use tubes.

In the countryside, either there is no electricity, or the voltage is too low to make the electrical appliances work, so some farmers who became rich first need a special voltage regulator in order to bring their own refrigerators and washing machines.

Electron tubes, have been used until now, and then look at foreign countries? It has not only entered the era of integrated circuits, but also entered the era of program control.

Wang Limin knows the gap between the East and the West, a few years ago, Wang Limin himself only knew analog circuits, and even asked Qin Zhenhua to help him go to school to give lectures, teaching the knowledge of digital circuits.

If the digital circuit continues to develop, it is a computer, and to make such an inverter, it is definitely not necessary to use a big guy like Intel's 8088 chip, but to use a simple single-chip microcomputer, on a single chip, to achieve the various components of the computer, a single chip to achieve the function of the computer, it is called a single-chip microcomputer.

Sure enough, after dismantling it, Wang Limin gasped even more: "My good man, the inside is full of chips!" ”

Wang Limin couldn't believe his eyes, such an inverter used in herdsmen's families, in terms of the complexity of the circuit, has reached the highest level in the whole country!

Needless to say, in my Capital Institute of Technology, not to mention undergraduates, even if it is a master's graduate, it is enough to take such a product as their graduation design, if you get the first place in the National Student Competition, it will be appropriate!