If he wants to contact the outside world and receive broadcast or shortwave signals, Chen Xin must set up the prepared antenna so that he can get in touch with the outside world.

And if you want to do this, at least until the wildfires in the outside world are completely extinguished, the temperature drops, and Chen Xin can open the door of the shelter and go out.

However, according to Chen Xin's predictions, it may take at least a month to wait for the outside temperature to cool down and the wildfires to be extinguished.

However, if you just wait for the effects of the EMP shock wave to dissipate, it will be about the same in a few days.

The so-called EMP is the meaning of electromagnetic pulse, which is a sudden, high-intensity pulse of broadband electromagnetic radiation, and the electromagnetic pulse usually lasts only *** clock for the longest time.

Electromagnetic pulses are usually triggered by nuclear explosions, lightning, sunspots, conduit effects, or electrical sparks, and old televisions are damaged by lightning during thunderstorms because the electromagnetic pulse triggered by lightning burns out the electronic components inside old televisions.

Normally, the duration and impact of the electromagnetic pulse will be very short, but this time the electromagnetic pulse is caused by a meteorite disturbing the ionosphere, and its duration is obviously longer than that caused by a nuclear explosion or lightning.

The reason why Chen Xin waited for so many days was mainly because in addition to the large meteorite of the main body, there were also many small pieces of meteorite fragments and materials that were lifted into space by the meteorite impact.

These meteorite debris and materials lifted into space will continue to fall for days to weeks after the meteorite impact, causing ionospheric disturbances and causing electromagnetic pulses.

Therefore, if you want to avoid damage to electronic products, it is safer to wait a few more days.

Of course, this cannot wait indefinitely, because the meteorite debris formed by the impact of the material and meteorites that have been lifted into space may not fall clean even in the next 100 years, and their disturbance of the ionosphere will continue, but the scale of the disturbance caused by these debris and dust will not be very large.

Large pieces of meteorite debris and materials lifted into space will be the first to fall, and their disturbance of the ionosphere will have an impact on the whole world, and when these large pieces of material have fallen, the remaining small pieces of matter will not only last for a long time, but also cause much less impact on the electromagnetic pulse, which can basically be ignored.

According to Chen Xin's estimates, the whereabouts of these large pieces of matter will last for about a week, so if he wants to unblock his electronic products, then the waiting time for about a week will be about the same.

Because the large pieces of matter have already fallen, even if the remaining small pieces of material can cause an EMP shock wave, with a layer of soil hundreds of meters thick above the head, it will not affect the electronics in the shelter.

This can be judged from the fact that the light bulb will flash all day long, and even burn out, to now it will flicker every few hours.

However, although he only needs to endure for a few more days to take out his mobile phone and computer to play, Chen Xin still feels very bored now.

This is an underground shelter, although Chen Xin did not dig very deep, but the hundreds of meters thick soil layer above his head not only protects his shelter from various disasters, but also isolates almost all the sounds of the outside world.

In fact, if it weren't for Chen Xin's professionalism that he stayed alone all the year round and was used to a relatively lonely environment, he would have been alone in this very quiet environment for a week, I'm afraid he would be the same as those who were locked up in the army.

It was so quiet that the lighting could only rely on the lights, and after turning off the lights, Chen Xin couldn't even tell whether he was day or night.

If it weren't for a mechanical pocket watch and the system's daily settlement as a time reference, Chen Xin really felt that he would even be confused with time if he stayed for a few more days, and he didn't know how long he had been here, whether it was day or night outside.

Although with the impact of the meteorite impact, the sky outside should have been obscured by dust, and the sun will not be visible for hundreds of years, there is no difference between day and night at all.

Chen Xin knocked on his forehead, and suddenly felt that he should have bought a smart window, of course, not the kind of smart window that automatically adjusts the light and ultraviolet rays, but a smart window that can change the scenery.

A display screen can display different scenery according to different time periods, which is a must-have for Chen Xin, who is underground and isolated from the outside world.

And with the advent of the long night and the cold winter, after the surface of the blue star has been devastated by the global fire, it is obvious that the scenery of birds and flowers in the past has become a masterpiece, leaving such a window that can make people recall the beautiful past, it is undoubtedly a commemoration.

It's just that Chen Xin obviously didn't take this into account at the beginning, so that now he can only look at the cold ceiling in a daze.

Otherwise, even just looking at the grass and woods in a daze can make people feel happier than the ceiling in front of them.

Of course, without smart windows, Chen Xin can't change one, maybe when upgrading the room in the future, through the overall upgrade of the room, you can have more such equipment, but now Chen Xin feels that he may be able to upgrade the lighting system first.

Adding smart features to the lighting system, adjusting the light intensity and tone according to the time of day, so that you can feel the change of time even in an underground shelter, is undoubtedly much better than the rigid fluorescent tubes of today.

And with the change of time, you can also plan your time better, so that you don't live your life so muddy.

Thinking of this, Chen Xin flipped out his notebook and wrote the light on the page with the two items of food and medical treatment.

However, if you upgrade the lighting, will it increase the power consumption?

Chen Xin finished writing the light, the tip of the pen paused, and after a little thought, he inserted the power supply in front of the light.

Although the current electricity consumption of the evacuation shelter is not very large, and the generators are not running at full capacity all day, most of the electricity generated is stored in the storage batteries, but considering the increase in electricity consumption caused by various equipment upgrades, the upgrade of generators should also be considered.

It's just that upgrading the generator undoubtedly means that fuel consumption increases, how long can the three tons of gasoline stored by yourself last?

Chen Xin is seriously thinking about this problem, but there is no need to be too troublesome to solve this problem, whether it is to wait for the external environment to stabilize, according to the original plan to take fresh vegetables out to find people to exchange materials, or through the system to upgrade the power supply system, the fuel generator is upgraded to a higher technology or even black technology power generation equipment, it is a way to solve the problem.