The next day, Banxia got up early, hummed a song, packed up her things, and jumped around the house.

She is in a good mood.

For breakfast, eat cabbage and lotus seed porridge with purslane cold smoked venison shreds. The salted smoked venison tastes a bit hard, so you have to tear it into thin shreds and eat it with lotus seed and wild vegetable porridge.

I’m going out today! I’m going to have a historic meeting! After the destruction of human civilization, the remaining survivors meet again for the first time.

If mankind can continue in the future, then today will be a day recorded in history - September 8th, the date when human civilization begins again. If there is still religion in the future, then today will be the seventh day of creation in the Bible.

Day is when Moses led the people to part from the Red Sea in the Book of Exodus. Hundreds of years later, in the "New Bible", it will be recorded as follows: As soon as the radio station was turned on in Pinellia, Maxwell used electromagnetic waves to make the survivors aware of the city overnight.

Awakening, mankind is reborn.

"You fell from the sky and landed on my horse."

Banxia was humming a song, holding a bag in her hand, and all the equipment she needed to carry with her was spread out on the floor, filling the living room.

She counted them one by one.

There are lighters and fire starters. The fire starter is a magnesium bar and half a saw blade. When igniting a fire, use the saw blade to scrape the metal magnesium on the hay or paper to ignite the fire. This kind of fire starter has a simple structure and is not afraid of water.

.

"The jade-like appearance, clear water eyes, and slight smile make my heart feel hot."

This time Banxia put twice as much dry food into her backpack, and each piece of dry food was wrapped in plastic sheeting. If the number of people here increases in the future, the food pressure will also increase.

Fortunately, there is never a shortage of food in Nanjing.

"You who don't look back, spread your wings!"

"Looking for the direction, the direction is ahead."

The girl went downstairs step by step humming a song and opened the door of 703 downstairs.

This house was empty, and all the furniture had been moved away. With the creaking sound of Banxia opening the door, a furry little pointed face poked out of the bedroom.

"Good morning, Uncle Huang." Banxia greeted it, "I didn't disturb your sleep, did I?"

Uncle Huang was obviously used to her. He curled up at the door of the bedroom, scratched his itch with his front feet, narrowed his eyes and yawned.

This weasel has lived here for several years. When Pinellia had an impression of it, Uncle Huang was a resident here. It lived in 703. Later, 703 was requisitioned by Pinellia and the teacher as a power distribution room, and they did not use it.

Instead of driving him away, he often brought him food. This weasel lived a very comfortable life in his later years.

Banxia closed the door with her backhand and stepped into the living room, carefully avoiding the white PVC pipes on the floor. All the debris in this house had been cleared away, leaving only a huge metal shelf and a rusty silver building.

The cabinet stands against the wall, and a whole wall of car batteries is placed on the shelf.

Forty in total.

Forty car batteries, densely packed black cables were connected from the batteries, and then branched into dozens of white PVC pipes, and exited through the floor-to-ceiling windows of the living room. It looked spectacular.

At that time, the teacher took her to search for all the usable car batteries and brought them here. From then on, all their electricity use relied on these forty car batteries. The voltage of one battery was 12 volts, and the forty batteries were connected in series.

, is a 500-volt high-voltage power supply. This huge battery pack is connected to the silver cabinet next to the shelf. The cabinet is an EPS, whose full name is Emergency Power Supply System. The teacher found it from the nearby Nanjing Agricultural University Hospital.

, it is essentially an inverter that can invert 500 volts into 220 volts.

The EPS is then routed into the stairwell, and the 220-volt AC power goes up the stairs and enters the 803 upstairs to provide power for Banxia's daily life.

There are three sets of wires connected to the battery pack, two sets of outputs and one set of inputs.

In addition to one set of lines that output EPS, the other set of output lines does not pass through the EPS cabinet, but goes directly out of the floor-to-ceiling window, drops along the outer wall, and is connected to the high-voltage power grid.

The high-voltage power grid is actually a fence, less than one person tall. Insulated wood is used as a support. A wooden stick as thick as a bowl is erected every two or three meters. Metal wires are then used along the wooden support to connect the entire 11 buildings of Zhongqinyuan.

Circle them all.

Metal wire is a bare outdoor telephone wire with its outer sheath peeled off. It is a twisted pair made of three copper wires and four steel wires. The steel wires ensure strength and the copper wires ensure conductivity. It is an excellent material for power grids.

There are six wires on the wooden support from top to bottom. The distance between every two wires is ten centimeters. They are insulated from each other and do not touch each other. One, three, and five of them are connected to the positive pole, and the wires to 2, 4, and 6 are connected to the negative pole—

- Under normal circumstances, they are clearly separated from each other and live in peace. If an intruder touches the power grid and connects the adjacent positive and negative lines, the voltage of 500 volts can kill the uninvited guest.

Contrary to what many people imagine, the high-voltage power grid consumes no power when it is normally connected, because the positive and negative poles of this circuit are open circuits. As long as nothing hits it, it will not consume much power if it is left there for a year.

What to do if it rains?

Banxia asked.

Will it not conduct electricity even if it rains?

No, the teacher touched her head. As long as the voltage is not higher than a thousand volts, we don't need to consider the rain problem.

The solar panel is responsible for charging the battery pack. The solar panel was removed from the street lamp by the teacher with Banxia - after the disappearance of human beings, the solar street lamp is still working. They light up on time after dark. In this dead silence

The uninhabited city lights up alone, like the remaining souls after the death of human civilization.

All the solar panels are hung on the outer wall of the balcony. They are not laid flat on the roof to prevent bird droppings. One solar panel has a voltage of more than ten volts, which is just enough to connect one solar panel to one battery. It is quite simple and crude, but the simplicity of the design is important.

At the expense of actual operation, their hands cramped up from the tangled cables.

After the cables were connected, the room looked like a wire hole. In order to facilitate organization, Banxia and the teacher gathered all the cables into categories and bundled them into white PVC plastic pipes to prevent mice from biting them.

Rat thieves love to chew on electrical wires.

This is why Banxia and the teacher want to keep Uncle Huang in 703. With Uncle Huang here, the rats will not dare to be so rampant.

Ban Xia would come down every two days to check the power supply. She stopped in front of the battery pack for a long time, then squatted down and pulled out the gasoline generator from under the shelf, brushing off the dust.

"Uncle Huang, Uncle Huang, do you think that if other people come here, wouldn't it be a good idea for them to live here with you?"

Banxia turned around and asked.

Uncle Huang was lying on the floor, his button-like black eyes staring at her, his two forelimbs covering his wet nose, his eyes innocent.

"Okay, okay, I won't kick you out." The girl chuckled, "There's no room for people to live here, let them live in the house opposite."

Uncle Huang tilted his head, not sure whether he understood or not.

·

·

·

Bai Yang came out of the room yawning, and his mother took the opportunity to enter the room and mop the floor.

She could only go in after Bai Yang came out, so as not to see something she shouldn't see.

Dad was sitting at the table reading headlines, the TV was on, CCTV13 channel was showing a live news broadcast, and the anchor’s voice was always the background music in this room:

"It is believed that our country will officially launch the sound-finding program next year. This is our country's first initiative to actively search for habitable extraterrestrial planets and even extraterrestrial civilizations. The sound-finding program may inject new energy into exoplanet detection activities.

vitality……"

Bai Yang sat down on the chair, took a sip of water, pointed at the picture on the TV and said: "It would be great if we also had such a big antenna. Wouldn't it be so exciting to use it for radio communication?"

Dad raised his head and glanced, "That's FAST, the radio telescope."

"Can it launch?"

"It can only receive, not transmit." Dad said, "This cauldron can hear aliens whispering. Using it to do amateur radio is a waste of money. Did you stay up late last night playing radio again?"

Bai Yang turned to look at his mother and nodded quietly.

"How's the situation?"

"There is one, the black channel I mentioned to you last time. I contacted her again, but it's not actually a black channel." Bai Yang replied, "BG4MSR."

"BG4MSR?" Dad frowned.

"Her call sign."

Dad tried his best to recall it, and then shook his head, "I've never heard of this call sign. Could it be someone who recently took the exam... CRAC didn't hold an exam recently, right? Alas, I don't know too well. I've removed the mental retardation spectrum.

.”

"I've also removed the mental retardation spectrum."

"Why?"

"It can't be opened again." Bai Yang said, "Let's not talk about it anymore. Dad, please give me an idea. BG4MSR has an appointment with me. We will meet at the intersection of Alfalfa Garden Street and Zhongshanmen Road at six o'clock this afternoon. What should I do?

?”

Looking back now, Bai Yang didn't know why he agreed to her like that. He promised cleanly, but he tossed and turned all night long and couldn't sleep.

This is probably the dilemma of an innocent little boy, right?

Bai Yang thought so.

"Oh?" Dad was very indifferent, "She is also from Nanjing?"

Bai Yang nodded.

"That's good, just go. Toads often meet offline, and you can exchange skills." Dad was calm, "Do you know how your mother and I met?"

"How did we know each other?" Bai Yang was stunned, and thought to himself, could it be that they were destined to be married for thousands of miles? They met through the radio station?

"We met on a blind date."

poplar:……

"What I mean is, you don't have to be like me." Dad explained, "I was in the army and had no conditions or options but to go on a blind date. If I hadn't had no choice but to go on a blind date, I could

Like your mother..."

"What's wrong with me?" Mom poked her head out of the bedroom. The temperature in the room dropped sharply by five degrees.

"...Marry a perfect and outstanding woman like your mother?" Dad said.

Mom snorted coldly and shrank back again.

Both men breathed a sigh of relief.

"Yang!" Mom yelled from the bedroom, "I don't object to anyone you meet. If you want to go there, you can go, but you have to finish all the math papers I have been handed out today! Teacher Liu emphasized in the group

Yes, I have a review tomorrow!"
Chapter completed!