In the afternoon of this day, the girl was still tossing the motherboard. The motherboard, which had been placed in a humid climate for twenty years, was like a mold petri dish, with brightly colored hairs. At first glance, she thought it was a paint palette. Pinellia ternata

Clean them up and put them outside in the sun. Wang Ning said it is best to find unopened and unused motherboards. Industrial control or military motherboards are best because they use tantalum capacitors, which are not easy to break.

"3150 industrial control motherboard, I think it should be possible to find a Celeron 3150 fanless industrial control motherboard." Wang Ning said, "This thing is easy to find on Zhujiang Road."

"Have you ever used that thing?" Bai Zhen asked, "What system?"

"XP, or Win7." Wang Ning replied.

"Very good." Bai Zhen nodded, "Then we can call a red alert."

Banxia turned over the square motherboard in her hand and blew on it. This was probably the most sophisticated man-made thing the girl had ever seen, with a green substrate, silver circuits, densely packed resistors and capacitors, large and small interfaces, and a dizzyingly complex structure.

, Banxia brushed off the dust very carefully. This motherboard has no fan, and there is a large black heat sink in the center of the board.

It will be the core of the image transmission link.

It is responsible for converting image data collected by the camera into audio signals that can be transmitted by amateur radio stations

"Wait a minute, what did you say?" Bai Yang asked, "Audio signal? Sound?"

"That's right. What's the problem, Xiao Yang?" Wang Ning put the motherboard on the coffee table and raised his head.

"Convert...convert images into sounds?" Bai Yang couldn't believe it.

"Yes, you heard it right, it is to convert image data into audio signals, transcoding the photos that your eyes can see into the 'sizzle, sizzle' sound that your ears can hear." Bai Zhen nodded.

"Any data can be converted into a sound signal." Wang Ning said, "This is the simplest transmission method. Like electromagnetic waves, sound waves are also waves. As long as they are waves, they can be modulated. When you usually use voice communication, don't you just rely on the microphone of the radio station?

And amplifier? If you modulate your voice, it can also carry image information."

"This... oral transmission picture?" Bai Yang was stunned.

"Suffice it to say, if your tongue and vocal cords were strong enough, you could put your mouth into a radio station and send out precise modulated sound waves that would sound a bit like Parseltongue from Harry Potter, and the person on the radio

If you have a tape recorder, record the sound, input it into the computer for transcoding, and then it can be restored to a picture." Wang Ning nodded, "This is why we need to use a motherboard, because the motherboard usually comes with its own sound card."

"What is information? Information is essentially orderly and regular. As long as you can change its regularity, anything can carry information." Wang Ning continued, "For example, let's say I beat your dad."

"Get out." Lao Bai said.

"I hit your dad's jaw quickly and regularly with my fist, using binary." Wang Ning said, "I can even create a Windows system."

"Then my dad's mandible will be replaced with titanium alloy." Bai Yang said.

"The same goes for sound. Sound waves can be modulated, and they can carry any information." Wang Ning said, "This is currently the simplest and most suitable transmission method."

"This is the so-called AFSK." Bai Zhen said.

The two old men bought a large number of motherboards and cameras and piled them up in the living room. The number was so large that my mother was annoyed. She said that opening the door felt like entering a second-hand electronics market.

Under the guidance of Wang Ning and Bai Zhen, Banxia can save anything from electronic waste on the Pearl River Road.

She sat cross-legged on the floor of the living room, leaning against the sofa, and kept saying, "Mom and Dad, how on earth was this thing... made? It's incredible."

In Ban Xia's imagination, this thing was hand-held with tweezers, holding small parts and soldering them one by one. However, some components on the motherboard were so small that she couldn't see them clearly. How should they be soldered?

Suddenly she picked up her slippers.

Hold your breath and concentrate, remain silent for a moment, and then strike out like the wind, as fast as lightning!

The slippers flew out in a spin and hit the cabinet with a "slap". Over the years, Banxia had already developed the ability to identify the location of sounds. She saw six directions and heard all directions. She was more sensitive to the sounds of mice than cats. As long as she

If there was any movement of a mouse in the room, she would hit it with her slipper as fast as lightning.

However, this time there was no "squeak" sound of mice escaping. Instead, the debris piled on the cabinet fell down with a "crash".

Banxia had no choice but to get up and clean up.

These were the miscellaneous things that she had moved out when she was looking for an English-Chinese dictionary some time ago. She didn't have time to clean them up at the time, so they were piled on the TV cabinet. They just fell down after being hit by a slipper.

There were pens and papers, coins, empty boxes, pills of unknown use, and the big book "Journey to the West". Banxia stuffed them all back into the drawer. In fact, she was also a person with a messy life.

When people live, they take things everywhere and put them wherever they go.

The girl picked up "Journey to the West" from the ground. It was a thick book. She almost didn't turn it over because she couldn't understand it.

I heard the teacher tell a story about a bald man and his three disciples who went to the West to learn Buddhist scriptures.

Banxia flipped through it casually, glanced at the page number, and glanced at the header.

"Three Tibetans never forget their roots...the Four Sages test their Zen mind..."

Banxia thought for a while.

"The three women turned to the screen and left a pair of gauze lanterns behind. The woman said: Four elders, are you willing to pay attention to the girl who is worthy of me? Wu Jing said: We have discussed it, and the one named Zhu is recruiting a wife.

.”

I flipped through two more pages and read it out casually.

"The woman uncovered her head and said to him: Son-in-law, it's not my daughter who is so naughty. They are all so humble and refuse to recruit you. Bajie said: Mother, since they refuse to recruit me, just recruit me! That woman

Humanity said: What a wonderful son-in-law! No matter how big or small, even the mother-in-law wants one!"

can't read.

Can't understand it at all.

Why do pigs have mothers-in-law?

In this era, books have lost their meaning of existence. The teacher once had many books in his collection, but they were all burned in the end, along with her materials and notes. Banxia still remembers the teacher throwing them into the brazier with a dull expression and burning them.

, sitting there all afternoon without moving. There may not be many books left in Nanjing. A library as big as Nanjing has been emptied out. Of course, people vacate the library not for reading, but for reading.

In order to keep warm, Ban Xia remembers that one winter was so cold that the teacher chopped all the wooden furniture into firewood to keep warm.

That was the last time it snowed in Nanjing.

"That night, when all the ministers dispersed, the monster entered the Yin'an Palace. Eighteen palace maidens were selected to play, sing, and dance, and persuaded the monster to drink and have fun. The monster sat alone on the table, and those lined up on the left and right were all beautiful and charming.

.You see, he enjoys it. When he drinks until the second watch, he gets drunk and can't help but do whatever he wants." Banxia recited loudly while pacing in the living room, "jumped up, laughed loudly, and revealed his true nature.

. Suddenly became ferocious, stretched out his big dustpan hand, grabbed a woman playing the pipa, and bit her head hard. The seventeen palace ladies were so frightened that they went to hell..."

She was stunned.

She suddenly realized that she had read it wrong.

Fuck it is not the original text of "Journey to the West", but the words someone wrote on the paper, written with a black gel pen, messy and scrawled, inserted diagonally between the lines of the neatly printed Song-style original text.

"my God."

Banxia said softly.

This is the teacher's word.

She was stunned for a long time, then she realized what she was doing, and she quickly flipped through the pages crazily. With a brief glance, she saw a mess of graffiti, formulas, numbers, English and Chinese characters.

1200 kilometers.

big eyes.

25473000.

Observation.

Entropy.

Galaxy.

"Oh My God."

Banxia murmured.
Chapter completed!