My Doomsday Shelter Unlimited Upgrades

For the next job, Chen Yang plans to build a barbed wire fence.

Unlike the barbed wire fences like football fields or basketball courts, what he wants to make is a barbed wire fence for the end of the world.

It is tall and thick, covered with thorns, and there is a risk of injury if you touch it even slightly. What he wants is this kind of fence.

After processing the iron blocks into thin strips and bending them, Chen Yang simply built a relatively simple barbed wire wall with a height of about four to five meters.

This kind of barbed wire is not lethal, because it is a material taken from the processing function of the system. The outside of the barbed wire is extremely smooth, and there are not so many spikes.

It's not that he can't make the spikes, but the production process is more difficult. He wants to test whether the barbed wire can be directly upgraded, which saves him from wasting time and energy.

The layout of the barbed wire also requires a lot of materials. Based on his current inventory, it is not bad to be able to make this 4m high and 20m long barbed wire wall.

After digging a half-meter-deep tunnel on the ground, Chen Yang erected the barbed wire with great difficulty, inserted it into the deep hole, filled it with soil and pressed it tightly, and the system prompt that he had been thinking about finally sounded.

【Simple Barbed Wire Wall】:

Simple walls made of barbed wire.

Upgrade Direction 50: Expand the barbed wire wall area to make the outer side of the barbed wire sharper/smoother, requiring [-] survival points.

Upgrade Direction 30: Change the barbed wire structure to enhance its firmness and durability, which requires [-] survival points.

Upgrade Direction 100: Insert a high-voltage power grid into the barbed wire fence, which requires [-] survival points.

System Comments: Anti-zombie only!

"Sure enough, the power grid can be added."

Chen Yang once again set off a thought storm in his mind. 100 survival points can lay the power grid. It sounds very attractive, but in reality it is not so good.

Grid is secondary, electricity is primary.

The current 7500W electric power is definitely not enough to supply power to the 20m4m barbed wire fence grid, and this is only one. His initial plan is to make four such barbed wire fences, first to surround the shelter.

On the contrary, he is not so worried about the power supply problem. Now the number of survival points is several times higher than that of the previous few days. The big deal is to get more generators or get a few solar panels out.

According to previous calculations, the cost of a square meter of solar panels is about 30 survival points, excluding materials, and can generate 1500W of power per hour. The actual situation may be even higher.

Chen Yang is confident that 4 square meters of solar panels can be produced within three days. Coupled with the application of hydroelectric generators, the hourly power generation can reach about [-] watts. Such power supply efficiency can definitely meet the needs of the grid. need.

He didn't expect the upgrade of the power grid to be so cheap, nor did he expect the survival point to come so quickly, and he didn't expect that he would give priority to upgrading the power grid, so he hadn't started to solve a core problem.

Problem with voltage delivery value.

The output of his generator is 220V AC voltage, which is the voltage of daily electricity, but the high-voltage power grid generally does not use 220V. If it is used in prisons or armories, the voltage in the power grid generally reaches tens of thousands of volts. This requires him to have a transformer to transform the voltage for use.

In fact, the voltage of 220V is not bad, but it can only be said that it is relatively easy to live. The 220V voltage electric person will definitely die at once, but if you really want to electrify those rough-skinned and thick-skinned monsters, such as the iron wolf, he does not know the voltage of 220V Enough is enough.

In addition, in normal days, he cannot maintain the 220V voltage delivery all the time.

After all, this is not a prison or an armory, but the shelter he has to go back and forth every day, his home, if he accidentally falls, accidentally touches the power grid and is electrocuted to death, it will be a shame.

Therefore, on weekdays, the power grid can only transmit an alarm voltage of [-] to [-] volts. When someone gets an electric shock, an alarm will be generated but the person will not be electrocuted. He can then observe what the electric shock is and choose to increase the voltage or Lower the voltage.

The transformer has become an urgent just need.

This thing can be regarded as a compulsory course in the university, but he has only learned the principle and has not done the real thing, and after another year or two, he has forgotten what it is all about.

"What coil... what number of turns..."

There is a characteristic of learning this thing, the more knowledge you know, the more you are willing to understand it, and the less knowledge you don't understand, the easier it is to make people feel dizzy.

Chen Yang felt his head buzzing, and suddenly remembered that he had collected an engineering textbook in the dormitory before, which seemed to be about knowledge about electrical machinery.

I hurried back to the shelter to rummage through the boxes, and I found a copy of "Electromechanics" in the corner of the living room where the books were stored.

"Primary coil, secondary coil, core..."

"I remembered!"

Chen Yang is not used to learning those technical terms. According to his understanding, a transformer is to wrap several turns of wires on both ends of a square-shaped iron core, for example, 10 turns on one side and 100 turns on the other side. When a voltage of 10V is applied, a voltage of 10V will appear on the side of 100 turns, which completes the effect of voltage transformation.

Of course, this is not to say that electricity appears out of nothing. The voltage of the electricity passing through the transformer is only increased, and the current will become smaller after conversion, and the overall power has not changed.

The iron core part is the key point of the transformer, which belongs to the manufacturing knowledge of the industry. Apart from explaining the principle, the book does not say what material the iron core is made of, and how it is made. Chen Yang can only make it with alloys at will. In the shape of a mouth, the copper cable is wound on the iron core in proportion.

After everything was ready, Chen Yang didn't wait for the system upgrade prompt, which made the scene a little awkward.

Speak with conscience, say that this thing is called a transformer, even dogs don’t believe it, let alone him, it’s normal for the system not to recognize it.

"How about...how about a power call?"

How the transformer is made, Chen Yang feels that even if he thinks about it badly, he can't figure it out. If he wants to upgrade the transformer, maybe the only way is to turn it on.

Thinking back to the first day of the end of the world, when he made the distillation equipment, he also distilled out the water system before recognizing it. Now it may be able to do it when it is powered on.

This kind of behavior is tantamount to walking on the tip of a knife, but as a man, he must give it a go!

It's not that he is willing to do such a dangerous behavior, but he is really forced by reality. He still has ideas where to find the generator. He has no memory of this kind of transformer for his own use.

Besides, in this university where even generators are hand-cranked, can there be transformers?He even imagined a bald and greasy cadre sitting in the very center of the meeting hall in order to save money, shaking his head, and said as if something happened:

"Why do we have to change the voltage? We didn't even have electricity when we went to school! What kind of transformer do we use? Don't buy it!"

So instead of wasting time looking for transformers, it is better to give it a go. If he can upgrade directly, he will be able to install a power grid system the day after tomorrow at the latest, and the safety factor of the shelter will definitely be different from what it used to be.

Chen Yang turned off the power transmission of the generator, pulled out a cable, and made two wooden pliers at the same time, one to clamp the cable and the other to clamp the iron core.

Before that, Chen Yang deliberately took out dozens of catties of beef and called the sheriff. In case he was unlucky, these dozens of catties of meat would be his inheritance for the sheriff.

It's just that the police chief didn't understand what Chen Yang meant. He stretched his legs forward, stretched his buttocks back, and yawned at the same time. The cute black cat tilted its head, as if a little confused: "Is the owner a fool? '.

Chen Yang couldn't care about Sanqi 21 anymore, the more hesitant he became, the more afraid he became.

"Give it a go, don't worry too much!"

"This is the character a man should have!"

Humming the courageous song "Let It Go", Chen Yang directly turned his heart on, switched on the power supply, and put a 220V cable on the iron core.

【Simple Transformer】:

Loss: 5000W/h

Upgrade Direction 100: Add a metal casing, change the internal structure and principle of the transformer, increase availability, reduce loss voltage, and need [-] survival points.

Upgrade direction 100: Add a control system, which can change the transformer transmission voltage in real time, reduce the size of the transformer, and require [-] survival points.