Life 1984

Chapter 33 Homemade Transformer

Shen Xiulan put down the broom in her hand, invited Lin Zhi to come in, and said with a smile: "I am his girlfriend!"

When Lin Zhi heard this, she was startled for a moment, then frowned, as if she was thinking about something, then she opened her eyes wide, pursed her thin lips, and smiled sweetly: "Are you his girlfriend? How old are you two? Just Are you in love? Don’t your parents and teachers care about you? "

Shen Xiulan lowered her head shyly, and suddenly a feeling of shame invaded her for no reason. She blushed and slowly lowered her long eyelashes, as if fighting against sleep.

After all, she is still too young and too thin-skinned.

Although she and Li Yunhai were in a relationship when they were in school, they actually just chatted together, borrowed books from the library, studied in the study room, and occasionally hid in the woods on the playground to hold hands. There was nothing else. Outrageous behavior.

As for correspondence, most of the conversations were about reading experiences, even discussing how to do homework, feelings about life, and ideal future.

Even words like I love you and I like you have not been used!
But in their hearts, they know that this is love.

Shen Xiulan's family also believed so.

In this era of not being too open-minded, if a girl puts aside her reserve and shyness and goes out with a boy, what is this but not falling in love?
But for some reason, Shen Xiulan was shy when facing Lin Zhi.

Lin Zhi took Shen Xiulan's little hand familiarly, like a best friend who has known each other for a long time, and asked in a low voice: "How far have you and him developed? Have you given yourself to her? Geez!"

Shen Xiulan looked even more reserved and awkward, and two blushes appeared on her pretty face: "No! He and I were classmates. He saved me once and we started dating. But he said he wanted to marry me! "

Lin Zhi smiled softly and said, "I really envy you. You are so young and have a romantic relationship. Li Yunhai is a man who promises a lot of money. He said he would marry you and he will definitely marry you."

Shen Xiulan hummed heavily, gradually lost her shyness, and asked: "Ling Zhi, why did you come to Yunhai?"

Lin Zhi blinked her eyes lightly and said, "I have to go to work tomorrow, so I came to tell him. He went to buy a copy machine these days, and I originally wanted to help him take care of the business in the store, but it turned out that my grandfather was sick. My parents were not free, and I was taking care of my grandpa in the hospital, so I didn’t come to help him look after the store.”

Shen Xiulan went outside and bought a bottle of ice-cold soda, handed it to Lin Zhi to drink, and said, "Yunhai told me about you, saying that you are a very loyal person. You can go to work without worries! I will help him when I have time in the future. busy."

Lin Zhi's lips were thin, revealing her agility and agility. She smiled and said, "Li Yunhai is also a man who values ​​​​love and justice. He helped my family repair two electrical appliances without charging me any money. I am grateful to him. I just helped him for two days. I will definitely be very busy after I work. Please tell him for me, I won't wait for him to come back. "

Shen Xiulan walked her to the door and said, "Ling Zhi, come and play when you have time!"

Lin Zhi waved goodbye, got on her bicycle and left.

A gust of wind blew by, shaking the dust off the tree, and one of them just happened to float into her eyes.

Lin Zhi's eyes were sore, and two crystal tears accidentally slipped down.

If dust particles enter one eye, will both eyes shed tears?

The wind blew Lin Zhi's white gauze skirt.

In the sadness of the wind, her color has disappeared, her fragrance has dispersed, and even her breath-like eyes and lilac-like melancholy have disappeared.

Some things are destined to end before they begin.

Should she be glad that she never confessed her feelings?
Or should I be sad and sad that I didn’t even express my love?
……

Li Yunhai came back after buying accessories.

As soon as you enter the door, you can smell the fragrance of soap.

Shen Xiulan cleaned the house, even the open space at the door, she cleaned carefully.

She mixed some soapy water into the water and used it to mop the floor and furniture, filling the air with fragrance.

Shen Xiulan took a big bag from Li Yunhai and asked, "You buy so many accessories?"

Li Yunhai said yes, turned on the faucet, and drank a few large gulps of water.

Shen Xiulan exclaimed: "Yunhai, you can't drink raw water! If you stay here for a long time, you'd better buy a briquette stove! It's very convenient to boil water for cooking."

Li Yunhai wiped the water droplets from the corner of his mouth and said with a grin: "Okay! If you are willing to come over and help me cook and boil water, I will buy it."

Shen Xiulan smiled sweetly and said: "Of course I am willing. But, are you going back to Meishan County to report? The registration certificate has an expiration date!"

Li Yunhai pondered: "This is really a dilemma for me now!"

Shen Xiulan asked in confusion: "What's so difficult about this? Didn't you say that you wanted to make some money doing repairs to pay for the tuition of your younger brothers and sisters, and then you would go back to work in Meishan County? As a national worker, you don't Don’t you want it anymore? Self-employed people have no status at all. Your family has sent you to study for so many years, isn’t it because they want you to become a national worker? "

Li Yunhai sighed helplessly: "This is my dilemma. Xiulan, let's not talk about it for now. Do you know how much money I can make by repairing these copiers?"

Shen Xiulan shook her head. Of course she didn't understand and had no way of knowing this information.

This is an era where information is seriously misplaced.

Not to mention that there are mountains across the industry, even those who work in the same industry and masters who know how to repair may not be aware of the huge business opportunities contained in the second-hand copier industry!
Li Yunhai smiled proudly, covered his mouth with his hand, lowered his voice, and whispered in Shen Xiulan's ear: "As long as I repair a machine, I can make 1 yuan by selling it!"

Shen Xiulan was so surprised that she could hardly close her mouth from ear to ear and was speechless for a long time.

"Yunhai, are you serious? Selling a copy machine like this, you can earn 1? 46800 yuan? A thousand unity sheets?" "That's right! I just went to Kewen Company to see it. Look, a Ricoh copier like this costs 90 yuan in their store! I bought these copiers for 1 yuan. As long as they can be repaired, isn’t it easy to sell them for more than [-] yuan? Compared to new machines Come on, my copier is cheap, only one-fifth of the price! Any fool knows that buying my machine is a good deal!"

"But first you have to be able to repair it, and secondly you have to find a buyer."

"Don't worry about my craftsmanship! I can definitely repair these machines. As for the buyer, I have already found the next buyer, the head office of a bank in Xizhou, and I want to purchase 5 copiers. I know their manager Liu who is in charge of logistics. I I have already made an agreement with him that as long as I have a second-hand copier that is [-]% new, he is willing to buy my machine at half price!"

"Half price? Then you can earn more than 2 for each of these machines? Oh my God! Yunhai, is this business so profitable? Are you sure? There won't be any traps here, right?"

"Don't worry! This is how you make money in this business! Make huge profits!"

"Yunhai, no one else has thought of such a profitable business, but you are the only one who has thought of it?"

"Who calls me smart! Otherwise, would you like me?"

"Hee!" Shen Xiulan smiled brightly, her face as charming as a blooming flower.

She told Li Yunhai about Lin Zhi's visit.

Li Yunhai said oh and didn't care.

He was now focused on fixing the copier as quickly as possible.

The problem that Li Yunhai needs to solve urgently is power supply.

Imported Toyo equipment all have 110V power supplies.

To use electrical appliances with a 110V power supply and plug them into a 220V socket, a transformer must be used in between, otherwise the machine will burn.

Don’t underestimate such a problem, it can stump most people.

But this matter cannot be difficult for Li Yunhai.

There are many simple ways to convert 220v to 110v.

One is to directly use a step-down transformer. Check the nameplate power of the electrical appliance. The power of the transformer is greater than the nameplate power.This is the cheapest method. The disadvantage is that it is not beautiful and the connection is not convenient.

The second is to purchase a finished 220V to 110V adapter power supply, which is suitable for electrical appliances purchased from Toyo. This power supply is slightly more expensive, but easy to use.

Third, for use in more sophisticated electrical appliances, you need to purchase a 220V/110V switching power supply. The switching power supply has good output stability, but is expensive.

However, Li Yunhai's requirements are higher!

He wanted to change the power supply format of the copier without leaving any trace.

There are several advantages to doing this. First, it is difficult for colleagues to understand the method when they dismantle his machine.Second, it looks good, does not destroy the original structure of the copier, and does not add conspicuous components, so it can be sold at a higher price.

The method Li Yunhai came up with is actually very simple.

On the power circuit, a diode is connected in series for half-wave rectification and voltage reduction. The voltage is equal to 220V multiplied by 0.45. Finally, a voltage of 99v is obtained, which is within the allowable voltage variation range of the copier.

The diode model can be 1N4004 or 1N4007, or resistor-capacitor voltage reduction can be used.

As for the frequency, the Kanto region of Japan is 100V/50hz, and the Kansai region is 100V/60hz.

Whether it is 50hz or 60hz, it can be used in China without any problem.

To change the voltage, the technical requirements for workers are very high.

Ordinary people don't understand this at all, let alone the ability to do it.

People who really have this ability work comfortably in state-owned enterprises!
This is also the reason why the second-hand copier market in the 80s was monopolized by Meishan people.

Li Yunhai just happened to have the opportunity, found this gold industry in advance, and entered this blue ocean market without looking back.

Before modifying the power supply of the copier, Li Yunhai took the initiative and made a transformer converter to test the machine.

If you want to convert the 220V mains power into 110V, you can choose a transformer according to the power of the electrical equipment and adopt the voltage dividing principle of the autotransformer to achieve it.

比如用的电器为60W，就选一只100W功率的变压器。每伏绕3圈，只要绕660圈，标注0、1、2，中间抽头后0和1或者1和2，就可得到110V的输出电压。

This kind of 110V is easy to obtain and relatively easy to wind by yourself.

Li Yunhai used this circuit principle to create a transformer using electronic components he bought in the market.

With the 220V to 110V transformer, Li Yunhai can finally try to power on the copier!
The quality of these copiers can be detected as soon as they are powered on!
Is it worth repairing?

Is it expensive to repair?

Li Yunhai is also looking forward to it!
(End of this chapter)