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After Gu Pan finished saying the sentence "I won't be kidnapped by aliens", I also felt embarrassed, and the boss also heard this sentence, and immediately became happy, and said in my heart, is this Gu Pan from Mars, I usually look so unsmiling, it turns out to be so funny, if I wasn't afraid that Zheng Wen would scold him, I would have to laugh out loud.

"Then Liu Meng didn't say where to go?" Zheng Wen then asked.

"I really didn't say it, he was often not in the dormitory, he didn't say where he went, and the brothers were embarrassed to ask, right, it made everyone embarrassed. "The boss is the boss, and every moment is associated with love.

"What should I do? The mobile phone is here, but the person is not there, there won't really be any accidents, right?" Zheng Wen ignored the boss and said to Gu Pan.

Gu Pan was also worried, and she had forgotten the unhappiness that Liu Meng had been waiting for, but she was much calmer than Zheng Wen, and after calming down, she said tentatively: "Can you take Liu Meng's mobile phone and take a look, maybe there are any clues." ”

Zheng Wen felt that it made sense, and hurriedly relayed this to the boss.

Although the boss usually wants to please beautiful women, he is unscrupulous, and he does everything he does, but this time he categorically refused, just four words, "Absolutely not!"

was so angry that Zheng Wen clenched her silver teeth.

The boss also has his own insistence, who knows that Liu Meng has some ulterior secrets in his mobile phone, if he doesn't get it, something big will happen, he will never betray his brother like this, he takes this very seriously, gags, jokes, help bubble girls, it's all fine, it involves the bottom line of principles, it is absolutely impossible.

Zheng Wen's tone softened and persuaded her, and the gentle tone that she had never had before made the boss a little fluttery. As a result, as soon as he mentioned taking the mobile phone, he immediately flatly refused, and the angry Zheng Wen hung up the phone directly.

said sullenly to Gu Pan: "What should I do, he refuses, don't worry." Maybe Liu Meng is really in a hurry. ”

The more she said this, the more frightened Gu Pan felt, and she couldn't care so much, so she opened a text message that Liu Meng gave her at the end and handed it to Zheng Wen, saying: "I always have a bad premonition, calculate the time." He went out between texting me, could it be that he hinted at me something?"

Zheng Wen took it and looked at it, and chuckled: "My cousin, I didn't expect you to look like a stupid woman in love, this is obviously a joke." ”

Gu Pan didn't argue with her, but insisted: "You have to bring your phone." Maybe there's a clue. ”

…………

Although Huang Sheng and the others may have fallen asleep, Liu Meng dismantled the DC power supply in the computer carefully, and even avoided the blind spot that the camera could not see and quickly unscrewed the screws after removing it.

For this simple switching power supply, Liu Meng can see the wiring direction and schematic diagram almost at a glance, and carefully remove the transformers with 5V voltage and 12V voltage in the backup power supply.

Carefully put the two transformers in your pocket, these two gadgets are lifesavers, and you can't be careless. Quickly screw the screws of the DC power supply, put it on the chest to cover it, quickly move to the computer host, and install it quickly.

After doing this, a lot of sweat has oozed from his forehead, and it is a matter of life, so how can he not be nervous, and his heart will not settle down until he recovers his original state.

There didn't seem to be a single movement in the office next to it. Although there is a small door in the middle of the two rooms, and there are bookshelves to block it, you can still hear subtle movements, but you can't hear clearly.

So far, I can only fight. Liu Meng thought that he had already agreed to cooperate, and Huang Sheng and the others had no reason to keep an eye on him, but they must also hurry up as much as possible, and it is best to get a micro high-voltage pulse power supply within an hour.

With this self-defense, the safety factor will be greatly improved.

The first thing to do is the first stage of the resonant step-up transformer, directly take out one of the transformers with a slightly larger core, use 1o 2.2uF capacitors in parallel, so that the capacity is increased to 22uF, connect the expanded capacitors in series with this transformer, and then connect in parallel with a No. 5 dry battery and a small resistance series circuit, and add a small switch between the two series circuits.

The oscilloscope is isolated on both sides of the transformer.

A simple device for testing transformer parameters was made.

The line is turned on, the No. 5 dry battery is charged with small resistance and transformer leakage inductance, which can be completed almost instantaneously, and the small switch between the two series circuits is pressed, and the transformer leakage inductance and the charged capacitor form a loop, which will generate series damping resonance.

By quickly intercepting the oscilloscope and recording the period of series resonance, the leakage inductance of the transformer can be calculated.

There is no need to calculate accurately, Liu Meng can complete it in his mind, and the result he gets makes him a little irritable, and the leakage inductance of the dismantled transformer reaches about O.1h, which is much more than the 2mh required for the previous calculation.

This means that he needs to completely disassemble this transformer, rewind it, and reduce the number of turns, which is originally a fluke, in case this transformer is directly available, it will save him a lot of time.

In this environment, the faster the degree, the safer it is.

After a short period of loss, Liu Meng had a courage in his chest, exhaled, immediately dismantled the transformer, and rewound it according to the 8-fold change ratio, and the enameled wire was quickly wound in his hand.

It is still the use of the simple test circuit built, the leakage inductance is still about 28mh, or too much, immediately disassemble to reduce the number of turns, in order to prevent too much reduction at once, the guide parameters are much smaller than the required 2mh, Liu Meng can only patiently think about a few turns of coil to reduce.

The longer the time drags on, the greater the potential danger, so it took 2o minutes to get it done, and I can't help but be a little anxious, and after subtracting two laps, connect the test circuit, according to the image in the oscilloscope, about 2.3MH, Liu Meng breathed a sigh of relief, the first stage of the resonant high-frequency transformer is completed.

Reinforcement treatment, pin solder points, the first stage of high-frequency transformer is ready.

Compared with the first-stage transformer, the second-stage step-up transformer with high transformation ratio is much easier, and there is no need to meet the resonance conditions, as long as the voltage is increased by about 2ooo times on the basis of the first stage. The pulse is sharper, and the pulse voltage of about 3ooooV can be output instantaneously.

The closer he got to success, the more rapid Liu Meng's breathing became, and his heart jumped to his throat, despite this. He remained calm.

With the experience of the first stage winding, the second stage transformer is much easier, and it only takes two modifications to meet the requirements.

Now that the device is ready, the second step is to draw the board, which is not complicated. However, it is necessary to consider the insulation and isolation between low voltage and high voltage, which also requires some careful design.

After a cursory thought, after all, he has rich experience in the development of high-voltage DC power supply, and when the first version of the sketch came out, Liu Meng only pondered for a moment and made partial adjustments. Even when it is finished, it is designed in the shape of a slender strip to make it easy to hide.

After determining the design drawings, it is very convenient to make the circuit board immediately, and there is equipment for making the circuit board in the real room, otherwise it will be soldered on the blank board with bare hands. It will take a lot of time.

As he got closer and closer to success, Liu Meng became more and more anxious in his heart, and now he couldn't care less about being unseen, so he could only speed up his pace.

Circuit board, Liu Meng didn't dare to make too much, only two pieces, too much, not easy to hide, one qiē for safety reasons.

Under the dazzling light, Liu Meng held a soldering iron to solder the device. I don't know how long I've been working with high concentration. At this time, I was already feeling drowsy in my head, and I especially wanted to lie on the table and sleep for a while.

But it must not, this is a rare opportunity, if Huang Sheng shows his small actions, the consequences will be unimaginable. For people like Huang Sheng, Liu Meng has a complete understanding and can do anything.

I tried my best to endure this huge feeling of tiredness, my eyes seemed to be dry, and it was difficult to see the pins of electronic devices at close range, but fortunately, I used analog devices, and there were not too many complex controllers with too many pins, otherwise my eyes would be spent, my hands would shake, the pins would stick, and one would be powered on, and it would be finished directly.

After all the welding is completed, it is also necessary to insulate the discharge head, otherwise it will be corona with itself, and I will look around, and there is no suitable item to use.

Liu Meng's mood instantly fell, and he forgot about this simplest but most important thing!

No, you can't give up, you have to persevere. Liu Meng tried his best to control his feelings, and he would definitely be able to complete it, and the strong self-confidence accumulated from solving countless problems over a long period of time allowed him to calm down immediately at this moment.

Successful experiences are extremely important for everyone, and they can help you to stay the firm in your beliefs and stay the course in the most difficult moments. Success is often a matter of persevering for a short time in the most pessimistic moments.

Liu Meng searched the whole room, and couldn't find a suitable insulating material, so he couldn't help but sit on the chair tiredly, and after a long time of highly concentrating on work, his mind relaxed slightly, and the whole body felt tired, a tendency to fall ill.

Sitting, gasping for breath, looking at the computer screen in front of him with a blurry feeling, his temples tingled, he stared hard at the time, and another three hours passed, and he worked almost 13 hours of continuous high-intensity work.

The two eyelids wanted to close together very much, and Liu Meng knew very well that falling asleep at this time was the abandonment of his mind, and he might be slumped.

Just as he was trying his best to fight the exhaustion, there was a slight knocking sound in his ears, he thought he had developed auditory hallucinations, and concentrated on what little energy he had left, and the sound disappeared again, and just as he was about to relax, the knocking sound came again.

In this way, Liu Meng was sure that this was not his auditory hallucination, but that there was indeed a sound coming out, and for the quiet room, even his tired breathing could be heard, and even the beating of his heart seemed so powerful.

Just when he couldn't confirm what the sound was, he suddenly saw some small cement particles falling from the most corner of the roof, and he insisted on standing up and walking over to take a look, a large cement particle fell down, and it happened to be in contact with one hand.

It turned out that the heating pipes were originally arranged here, but they were blocked after the realignment.

Raised his eyes to see, the corner of the roof actually revealed a small hole, a pair of eyes are also looking down, the two of them looked at each other, both of them were very surprised, the person on the roof let out a slight exclamation, Liu Meng listened to the voice, sure it was a woman.

……

The next chapter preview, Huang Sheng's final madness!

ps: Liu Meng seized the time to engage in high-voltage power supply self-protection, and the author Jun was also very tired of writing, begging for subscriptions and monthly passes.