After Guan Fei did the back as usual, he handed the copper foil board to Shucheng for inspection. Although he was very fast, the tape was very sticky and there was inevitably a little residue. This required follow-up personnel to remove it with a very fine flat-mouth file.

He used this time to check the progress of other people's work.

Guan Fei came to the warrior who was cutting particleboard with a bow saw. Seeing that he was very careful in sawing, the saw opening was always outside the contour line, and nodded slightly.

Leave more room, and then polish it a little more later. If the saw is broken, it will be much more troublesome to repair it.

"It's done well, better than I thought! The particles of particleboard are relatively coarse, and the sawing mouth is difficult to keep flat, and there will always be some pits and concave. After the sawing is finished, first use a file to smooth it, then adjust some gypsum, apply it flat, and then polish it a little, and it will be very smooth." He praised and pointed out the next steps.

"Yes!" Hearing his praise, the warrior became more motivated.

Guan Fei looked at it and found that the particle board was easy to cut. With five or six soldiers working together, the box cutting was very fast. The three large parts of the left, right and back panels had been sawed almost one-third, and the top and front lower panels were almost cut. The operating table was a little more troublesome, and the size was not large, but it also had to be cut inside, leaving holes for the rocker and buttons. A soldier held the cut wooden board and turned it over, and seemed to have no idea how to cut the holes.

"First use an electric drill, open a hole in the center, and when there is a gap, you can pass the saw bow through, and then saw it from the inside to the outside. Just wait until the saw is close to the circle, and then follow the lines." He pointed aside.

The soldier suddenly realized, slapped his forehead and said to himself: "Hey! I'm stupid! I just thought that this is a slim one, I can't cut the bow, and my brain is getting stubborn."

"Haha, it's okay, just do more, practice makes perfect." Guan Fei encouraged him and came to the warrior who was cutting angle steel with a saw blade.

In the arcade frame, the imaging tube and the operating table are relatively heavy. The load-bearing force is still a little worse than using a few screw holes, so an additional support frame is needed. Especially for the operating table, players press buttons for a long time, and sometimes they will beat hard when they are impatient, so they cannot bear it without a strong bracket.

This support frame was originally best to be welded, but now there is no welding equipment at hand, so I had to drill the holes for the time being and use screws to fix them. The disadvantage is that the screws are easy to loosen. After today, I still have to remove them and weld them again.

Guan Fei took a walk around and looked at his watch. It was only 7:13.

Judging from this progress, you can do the main frame without staying up late. With the precise drawings he drew, the workload is not large, so the frame part is really fine.

He came back and Shucheng had already finished the copper foil board.

"Put the board into a plastic basin. Put it down first, then put it on this end with a glass rod, slowly put it down, be careful not to splash it into your hands." Guan Fei pointed at Shu Cheng and put the copper foil board into the corrosion solution.

As soon as the copper foil board was put in, a violent reaction occurred where the solution and the copper foil were in contact. The basin was bubbling constantly, as if it was boiling.

Guan Fei stared at the basin and saw that the copper foil exposed to the corrosion solution was corroded in just a moment and was riddled with holes. At a speed visible to the naked eye, the copper foil disappeared into the solution, revealing the resin substrate below.

The light signal received by the eyes was transmitted to the biological auxiliary brain. Any slight changes in the copper foil board were monitored by him. Seeing that the copper foil was completely corroded, he immediately used a small hook completed by iron wire to hook the pre-drilled hole and remove the copper foil board.

Shu Cheng had already given him a basin of clean water, Guan Fei put the board in, and quickly washed away the remaining potion on it with a brush.

Using medicine to corrode copper circuits was an early practice. Chip production was also learning this technique. Using medicine to prevent partial corrosion of what is precipitated on the silicon wafer substrate. The advantage of this method is that it is low cost and simple technology, but its disadvantages are also significant.

The potion not only corrodes downward, but also spreads to the surrounding area.

Although there are important parts for gel protection on the surface, after the potion continues to corrode, it will naturally corrode along the bottom of the gel to the side. The printed board is better, the circuit is relatively wide, and the effect is not great, but for the chip, the line width is very narrow. A little more corrosion may damage the integrity of the circuit.

In order to ensure that there was no potion left, they changed the water twice before giving up.

The next highlights are all, and Guan Fei dare not leave it to others. It’s not that he doesn’t believe them, but that time is tight. Only when he takes action on his own can he ensure that the completion will not occur in the middle.

He took a wooden board, put the completed circuit board on, pressed the four small wooden blocks with nails, and then replaced the small handheld electric drill with a diameter of 0.2 mm, and drilled it down to the center of the circle reserved as the pin position of the component.

Squeak, puff!

A hole was drilled through. He raised his hand, pulled the drill bit back slightly, and almost stuck to the circuit board and drilled towards the next pin.

Squeak, puff!

Squeak, puff!

...

Xue Yangyuan and Shu Cheng stood aside, making people stunned. Guan Fei's hands drilled holes one by one, and the depth of each drilling and the height of lifting when pulled back were so consistent. Seeing him drilling holes was not like a human being, but like a machine.

Thousands of pins, all holes will be drilled in just over half an hour.

Average time per hole takes a few seconds!

Xue Yangyuan now believes that if Guan Fei said he would take one night to complete the product, he remembers every step and every detail of the product so clearly. His hands are so stable. It is definitely not a big deal to complete it overnight!

Others may not do it, but he certainly can!

"Shucheng, use fine sandpaper to polish the sharp parts of the holes. Be gentle and don't get rid of them." Guan Fei turned off the power supply, put down the electric drill, and handed the tail to Shucheng.

"Okay." Shu Cheng was stunned, and paused for a moment before quickly taking the fine sandpaper, touching the sharp place with his fingers, and gently polishing it.

Guan Fei went out for a walk and gave some advice on everyone's work. This can be regarded as a disguised time-sharing process...

All the particleboard parts have been cut, and the soldiers are rushing up to file the edges with files. A soldier is already mixing water and plaster. The plexiglass panel has also been cut and is also being processed on the edges. The support steel frame is faster, and the connection screws are almost completed.

Look at the time, it’s only 7:59!

When he turned back, he saw that Shu Cheng was still busy, so he poured the corrosion potion into a plastic bucket, twisted the cover, put a label on it, and carefully put it in the corner.

It took another half an hour before the construction of Shucheng was completed.

He took it, looked at the circuit diagram with a golden luster after polishing, and gently brushed his hand, not touching the sharp and thorny place, and smiled with satisfaction: "It's done well!"

Shu Cheng smiled and reached out and touched the back of his head embarrassedly. Although the printed board was mainly brigade commander, he also had his own contributions. Looking at the shiny printed circuit board, a huge sense of accomplishment surged in his heart.

It seems that electrical appliances are not that difficult!

Guan Fei took the circuit board and returned to the warehouse. Before, he took advantage of his spare time and moved the desk in the room and placed it by the wall next to the power socket as a workbench.

He first used a small spoon, mixed turpentine oil and alcohol, poured it on the printed board, quickly scraped it with a piece of wood, and applied a thin layer on the surface of the circuit board.

This is to apply flux to it, which is more firm when soldering and reduces the possibility of dummy soldering.

He placed the circuit board that had just been applied with flux and waited for it to solidify. Then he picked out all the components to be soldered except for the one-time write memory, and placed them in a convenient position and sorted them out.

Turning back, he also dealt with the back, connected the soldering iron to the power supply, and waited for the heating to rise.

Xue Yangyuan followed and watched quietly. Shu Cheng was aware of his subordinates. Seeing that he had nothing to do, he took the initiative to help other comrades. However, he was full of curiosity about Guan Fei, and even felt that his rhythmic and stretching movements were a kind of enjoyment.

Guan Fei calmed down and took a rest. He took the soldering iron and solder wire, twisted a resistor, and accurately inserted the hole of the pin pad on the circuit. When the soldering wire was pasted, the pin was firmly welded with the circuit.

He was focused on his head, lowered his head, soldered, raised his head, lowered his head, and soldered his components step by step on the circuit board.

As time passes by minute by minute, there are more and more components on the circuit board, while there are fewer and fewer components to be soldered next to it.

Finally, the last component was welded.

Wow!

A burst of warm applause woke him up from the mechanical movements. He blinked in confusion and looked over and saw that all the soldiers surrounded him and applauded hard at him.

"Brig Commander, you are so amazing! There are hundreds of components, but I didn't see you missing a hand!" A soldier clapped and admired.

"That's right, my eyes are straight, I've never seen such a fast hand speed."

Guan Fei put out the soldering iron and cursed with a smile: "Why are you guys forming a circle around me and everything is done?"

"Brig Commander, you don't even look at the time. It's almost ten o'clock! We've finished it long ago!" Bao Yaning took a small alarm clock and said with grievance.

It's really almost ten o'clock.

Before I knew it, I actually did it for nearly two hours!

Only then did Guan Fei feel sore all over his body and his neck was as hard as a piece of wood. The biological brain could control muscles and tendons, but it could not avoid the soreness and swelling caused by long-term fixation. For a moment, he couldn't even stand up, so he could only rub his legs hard.

"Brig Commander, I'll help you rub your shoulders." Bao Yaning leaned over and rubbed his shoulders.

"You flattery! It's useless to rub your shoulders." Guan Fei smiled and cursed, "If I go out later, I find that you haven't done your job well, so I'll still scold you."

"Hehe, don't be afraid or not. As long as you see it, you will definitely not scold me!" Bao Yaning smiled with a saliva.

"Okay, then I want to go see!"

Guan Fei stood up and walked outside the warehouse. Although he knew something in his heart, he still lost his mind when he looked at an empty arcade frame.

Really done!

He walked forward quickly and looked closer.

It is indeed done. Not only the frame body has been fixed with screws and assembled, but the rough edges are also smoothed with gypsum and polished to the point of fine and smooth, and even the handles and buttons are installed.

Although it was the first time to do it, and the handicrafts were relatively rough, the soldiers all completed the tasks assigned to them excellently.

"Not bad!" Guan Fei looked at the details one by one and praised it, "It's done quite well. I tell you that particleboard can't stand the screws, and you also remember it. Use expansion screws as the base and then screw the screws. OK, it's done well!"

When the soldiers heard his sincere praise, they grinned and laughed happily.

Guan Fei patted his shoulders one by one to show encouragement. Looking at their pleasant smiles, he felt deeply moved.

They have not had much contact with the outside world and are relatively simple in their minds. They are not polluted by substances, and they are happy enough to hear the sincere praise from their superiors. Under their own leadership, they will eventually see more, know more, and will have more temptations in the future. I wonder if they can still have this simple happiness in a few years, more than ten years later...

"Brig Commander, have you done the circuit board well and you have done it?" Zhou Xiaoyun also smiled and asked.

Guan Fei looked at his impatient expression and smiled and shook his head: "No, there are still things that are not done."

"What is that? Let's help you." Bao Yaning lowered his body, came through the gap, and volunteered.

"You can't help for the time being, that is, making ROMs, that is, program storage. I want to solidify the program into a dedicated integrated circuit. It is like a script. The processor must calculate and process the corresponding data based on the script, and display it through the image tube, which is the picture we see." Guan Fei gave them a brief introduction in a simple and easy-to-understand way.

"Can you do it tonight?" Shu Cheng asked with concern.

He will leave tomorrow. If he fails, wouldn’t he have to leave with regret? He hopes to see the product be made today, run it, and let him go back, and to tell the political commissar and deputy brigade commander what they did when they went to Hong Kong.

"No problem! You guys have a rest first, I will be fine soon!"

Guan Fei returned to the warehouse, and the soldiers did not turn on the TV and surrounded him. Even if they couldn't help, they wanted to accompany the brigade commander to complete the final work together.

Guan Fei nodded to them, took out a small cardboard box from the small cabinet next to the desk, opened it, and took out an instrument.

"This is an EPROM reader and writer," since everyone is not dispersed, he will arrange them blindly. "ROM is the abbreviation of English words, meaning read-only memory. The product we made this time is an arcade, which is a large game console. Usually, arcades produced by various manufacturers use the game program to be fixed in read-only memory. The so-called solidification means making an integrated circuit with a fixed circuit, and today we only make printed circuits. The soldering components are the same principle, but it is smaller, so small that it is only a little bit like a finger..."
To be continued...