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"Master, Xiaoxi brought your change of clothes!"

Li Zexuan returned to Zuifengxuan. After about a quarter of an hour, he did not wait for Uncle Fu to deliver the materials, but Xiaoxi arrived to deliver the clothes.

"Well, it's hard work, Xiaoxi, put these clothes in the back room and you can go back!"

Li Zexuan talked about several cases while recalling the relevant knowledge of physical chemistry in his previous life.

"Master, Madam was worried that you would endure hardship here alone, so she ordered Xiaoxi to stay here to take care of you these days! Xiaoxi will go back and bring you three meals a day!"

Xiaoxi hugged the burden she brought over and turned around and said.

"Huh~? Did my mother really say that?"

Li Zexuan raised his head and asked.

"Of course... yes, Xiaoxi has gone to clean up the room for the young master!"

Xiaoxi replied with a blushing face, then turned around in a hurry, and carried the package to the inner room.

In fact, after Sanbao sent back the news that Li Zexuan was going to stay in the workshop for a few days, Mrs. Li didn't expect to send a maid to take care of her son's diet and daily life. It was Xiaoxi who mentioned weakly behind, Mrs. Li just sent her here.

When she thought of it, Mrs. Li's meaningful eyes and smile made Xiao Xi's ears flush with embarrassment.

................................

"Master, this is the material that Mr. Fu asked Xiao to send over!"

Not long after Xiaoxi entered the back room, Song Xiaosi came with a package. After going through the last lesson, Song Xiaosi's smile now has a hint of caution, and he is no longer the same as before.

"Um."

Li Zexuan took the package, opened it, checked it carefully, and then nodded with satisfaction: "Very good! One is not bad, you can go back, little four, it's almost time for work!"

"Master, I'm not in a hurry. I can live in the workshop at night, or I'll wait here. If you have any orders, I can run errands for you, right?"

Song Xiaosi smiled diligently.

"No, I don't have anything to do here, I'll do it alone, Xiao Si, you should go back!"

Li Zexuan smiled and replied.

At this moment, Xiao Xi packed up the room and came out and said, "Master, your room is packed!"

"Well, hard work!"

Li Zexuan nodded.

"Ah~! Young master, then, that little one retire!"

Song Xiaosi immediately reacted when he saw Xiaoxi, and at the same time secretly hated himself for being too talkative, his young master is a rosy sleeve, so he doesn't need to come over to help.

"Hey!"

When Li Zexuan saw Song Xiaosi fleeing, he knew that this kid was thinking too much and planned to call him back, but after thinking about it, he thought it was okay, there was no good explanation for this kind of thing.

"Xiao Xi, there is a wing on the east side, you can clean it up yourself, I'm going to start work, young master!"

Li Zexuan mentioned the large package of experimental materials, walked to the room, and smiled at Xiao Xi.

"Oh!"

Seeing that Li Zexuan didn't need her help now, Xiaoxi said "oh" and went to another room to clean up her room. After all, she also has to live here at night, so she can't sleep in the same room with Li Zexuan, right? Although she thought about it, but...

................................

"Hey, after traveling for so long, I've finally done my job!"

Li Zexuan put the package of materials on the "experimental bench" that he temporarily put together with four long tables. Looking at this simple "laboratory", he felt a little emotional for a while.

As an engineering student, and he is an engineering student in his major, I didn't know how many circuit boards I soldered in the laboratory before, but I didn't expect to travel to the Tang Dynasty and still have to do my old job. The difference is that his current experimental conditions are even more Shabby, of course, the experiments done are also more basic and simpler, incomparable with modern integrated circuits.

"The work has started. Today, this young master will let the battery come to this world more than a thousand years in advance, haha! Dear Mr. Volt, I'm sorry for robbing you of your invention!"

Li Zexuan was gearing up, and muttered to himself eagerly.

That's right, what Li Zexuan wants to do is the simplest voltaic battery. What? Do you think the voltaic battery is weak and burst, why not build a generator?

Damn it, big-breasted brother, you are standing and talking without back pain, and you want to run before you learn to walk. You think a generator is so easy to build! You traveled to the Tang Dynasty and came over to make me a try? Can you make it without a month or two? Li Zexuan wants to generate electricity immediately, and then realize his next plan. How can he spend one or two months to build a generator?

Li Zexuan had seen the TV series "Myth" in his previous life. In it, the Yi Xiaochuan played by Hu Ge traveled to the Qin Dynasty. Because his mobile phone was out of power, he made a hand-cranked generator... This is of course the screenwriter's nonsense. In fact, he That thing can't generate electricity at all.

Well, magnets existed in ancient times, and the wire used was the gold wire on the clothes of the future Mrs. Liu Bang, Empress Lu. However, his gold wire has no insulating coating, and it is no different from a lump of gold when it is wound into a coil. The screenwriter does not know. The real generator coil is the enameled wire, not to mention the need for rectification and voltage regulation to charge the mobile phone... In addition, to charge the mobile phone, don't you need an interface wire...

Li Zexuan, who was born in science and engineering, struggled for a long time because of this matter. He also thought about

I really traveled to ancient times. When I need to charge my mobile phone, I should "according to the times" (the materials in ancient times are limited). What kind of device should I invent? Is it a simple hand-cranked generator, or some other quirky stuff?

What? You said that there was no signal in ancient times, so why charge the mobile phone? You can use your cell phone as a camera, but your cell phone can only be used for making calls? If there are some *** expansion pieces in the mobile phone, and donate it to the emperor, maybe you will have all the glory and wealth in your life...

After thinking hard and searching for a needle in a haystack on the Internet, he really let him find it...

In 1800, the famous scientist Volta (actually volts, the unit of voltage is volts, I don’t know why those idiot translators in China called him Volta for a while, and Volta for a while, so that when Li Zexuan was in middle school, his little mind was often called volta. Confused), invented the world's first battery and the ancestor of modern batteries.

He found through experiments that a piece of paper soaked in salt water was sandwiched between two different metals to generate electricity. He soaked the salt water with blotting paper, stacked a layer of silver sheets, a layer of blotting paper, and a layer of zinc sheets, and then connected the top and bottom metal sheets with wires, and found that he could measure the output voltage and current. This device is now called the "Voltaic Pile".

The principle of the voltaic battery is that after the contact between different metals and the electrolyte solution, the ions in the solution form a directional movement to generate an electric current.

Until now, the dry batteries we used were modified voltaic batteries. In the dry cell, the brine was replaced with a paste of ammonium chloride, and the copper plate was replaced by a graphite rod as the positive electrode of the battery, while the outer shell still used zinc skin as the negative electrode of the battery.

Is it easier to build a battery than a generator?

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