Ding Chen wants a street lamp, of course, not to prepare for democracy after use. Pen × fun × Pavilion www. ｂｉｑｕｇｅ。 infoIn fact, as the sun sets earlier, he has become more and more inconvenient in the way of lighting in the apartment, in addition to the oil light line is too dim, the most important thing is that the smoke is too choking.

When he first came out of the repair pod, he sorted out a solar panel and related circuits among the various elements of the evacuation chamber. So for quite some time, he actually had a light.

It's just that over time, the solar panels came to an end. So even the board with lights and batteries were thrown away, after all, that thing was a load, and Ding Chen didn't want to waste it on this no matter how much strength he had. Even if you are a waste picker, you don't carry waste.

At that time, he was in the wilderness, and in addition to rushing, he had to rush for survival every day. When I go to bed at night, I have to keep one eye open, and I don't dare to sleep, of course, there is no place to use the lamp.

But now that I'm at the apartment, I'm finally starting to live a normal life in peace and security. In this way, the long night was a little painful for him. Thinking that he might have to survive the long winter night, Ding Chen felt uncomfortable all over.

It's a pity that Ding Chen's job title is not enough, he said that it is useless to have light, and he has to find a way to take it off by himself.

So after seeing the portable lamp in the cave, he found out that it was using a lead-acid battery, and brought it back without much thought. As a result, when I returned to the apartment, I found that the antiquity of this lamp was simply touching China, and it actually used a small bulb for lighting.

There is not much dilute sulfuric acid left in the lead-acid battery, but the concentration is not small, Ding Chen put a paper cloth and stuck a little acid, and soon the paper strip turned yellow and carbonized.

However, the lead plate used as the negative electrode has been very corroded, covered with thick lead sulfate crystals, and there is no technical equipment, Ding Chen estimates that this plate can no longer be used, and even if it can be used, the effect will not be good. So in the best case, he can add some distilled water to obtain dilute sulfuric acid.

A few days ago, when he was making a waterwheel, he knew that there were copper plates in the apartment. In fact, the bearing of the waterwheel is a combination of the bearing and the wooden shaft made of copper plate, the copper plate has self-lubricating performance, the strength is higher than the wooden shaft, the working speed is slow and soaked in water, the possibility of heating up is very small, as long as the working surface does not cut the shaft, this combination can at least play longer than the leg.

As a result, he now has the cathode and acid solution to make voltaic batteries, and now only the negative plate material is missing.

There is no lead plate here in the apartment, and lead is toxic, so unless necessary, no one will stock this thing in daily life, and the pencils used by everyone are actually graphite and clay, and there is no lead at all.

Fortunately, there is no endless way, and without lead, he can still use other metals instead, as long as the electronic activity is higher than copper.

He brought back several aluminum lunch boxes from the cave, thinking about the practicality of this thing, but now when he needs heavy metals, he finds that as long as he handles them a little, these lunch boxes can be used as negative plates, and in terms of electronic activity, aluminum is better than lead, and the only drawback is that aluminum sulfate is difficult to electrolytically reduce, so this solution cannot be charged.

If the disadvantage of recharging can be overcome in the absence of electric energy, then the consumption of negative plates and solutions by the Bunsen battery has become the biggest disadvantage of this solution.

Ding Chen had no way to supplement aluminum plates and sulfuric acid, so he could only put his mind on reducing consumption.

The battery lamp uses a very old small bulb, which has a poor photoelectric conversion efficiency. In Ding Chen's time, it has been completely eliminated, and it belongs to the kind of antiques that you have to visit in museums. Relatively large incandescent bulbs can also be seen on some special occasions.

So Ding Chen naturally thought of light-emitting diodes. This kind of lighting tool with low power consumption and large lumens was once quite popular, and Ding Chen remembered that most of the street lamps used this kind of bulb, so he asked Wang Po to help him get a lamp head.

It's not a great secret. On the contrary, if Wang Po also knew about this plan, he might be able to help him get aluminum and sulfuric acid. That's why Ding Chen happily agreed to Wang Po's proposal.

Wang Po walked back to accompany Su Ying, while Ding Chen slowly returned to the bar, Ye Dai turned his head to look at him, and asked in a low voice, "What are you two talking about?" ”

"How can you say it's sneaky?" Ding Chen looked unhappy and said, "We are talking about business. ”

Ye Dai glanced at him, revealing a sneering look, "What do you have to sell?" ”

Ding Chen felt that he was insulted, so he leaned into Ye Dai's ear and whispered, "I can sell myself, do you want it?" ”

Ye Dai was stunned for a moment, and her face suddenly turned red.

At this time, Li Jing was disassembling Carlo's pistol, and Li Xiang was relieved to see his son's skillful movements. Turning his head to Ding Chen, he said, "Can we make this kind of gun?" ”

Ding Chen shook his head, most of the two-two pistols are alloy materials and plastic parts, and it is impossible to imitate them without a strong chemical foundation. Even if steel is used instead, the weight is too large, and the main source of bullets cannot be solved.

Listening to his explanation, Li Xiang glanced at Ye Dai and did not speak.

Ye Dai adjusted her mood, looked at Ding Chen and asked, "Have you ever made a bullet?" ”

Ding Chen shook his head, he knew how to reload bullets. But it was never actually done, because it wasn't necessary.

He still has a knife after running out of bullets, and with the conditions for reloading bullets, he can make more powerful bombs.

"We have some gunpowder and ****." Ye Dai approached him and whispered.

At first, Ding Chen only cared about enjoying the feeling of Ye Dai's hair floating gently on his face, so his reaction was half a beat slower, until Ye Dai had already sat back in his original position, staring at him with a pair of big eyes, Ding Chen reacted. He thought he had misheard, and looked at Ye Dai with wide eyes, as if he was comparing whose eyes were bigger.

Ye Dai looked at him innocently, so Ding Chen went to look at Li Xiang again, wanting to make sure if he had heard it wrong. Unexpectedly, Li Xiang shook his head, turned around and walked away.

Ding Chen pondered for a moment, looked at Ye Dai and asked, "So the news that Su Ying told us was not unintentional. ”

He said: "The gun Xu Shuidong made was designed by your father. The process and materials for reloading the bullets were also left by him? ”

"There's no craft." Ye Dai said: "Now we can only prepare nitrocellulose. Purchase required. ”

Ding Chen frowned, looked at her and said slowly, "This is your father's arrangement?" ”

Ye Dai looked at it and didn't speak. So Ding Chen felt that he really underestimated Ye Dai's father.

Originally, after he saw the primitive waterwheel built by the river, he always thought that Ye Dai's father's design ability was not good. But later, when I helped Ye Dai redesign the waterwheel, I found out that Ye Dai's father's design was actually very likely to be compatible with the manufacturing capacity here.

Then he heard some things about Ye Dai's father when he was in power, and he always thought that this was a very naïve political figure. But now I found out that Ye Dai's father actually kept a hand, he taught Xu Shuidong Machinery Manufacturing, but left the more advanced chemical ability to his daughter. It's just a pity that he died too early, so the design hasn't had time to work before the apartment will fall into its current predicament.

Thinking that Xu Shuidong attaches so much importance to Ye Dai, it is not just from love or family affection.

Thinking of this, Ding Chen sighed and asked, "Do you want to trade with him?" ”

"What do you say?" Ye Dai asked rhetorically.

Ding Chen looked at her and said softly, "If it's me, I'll agree." ”

"Why?" This is the opposite of Ye Dai's idea. It is said that Xu Shuidong has gained the ability to make guns, and his strength will inevitably skyrocket, and it is possible to eat the apartment.

"Because even if he didn't have gunpowder, he would have enough to fight this place." Ding Chen said: "When you are attacking from afar, you have to be the strong side. ”

He glanced at Su Ying, who was talking to her father in a low voice, and said, "I guess she is also convincing her father, you just wait and see." ”