Founding club president Lee Cheol-woo (2)
In the middle of making circuits for a while, Minseok came in again.
“Are you here?”
“uh.”
“How about it? Did you find someone? I don’t know if anyone can do something like this.”
“Who am I? You saved me?”
“really?”
I didn’t expect much, but I couldn’t believe that I had saved someone.
“So, I saved 5 of them too.”
“Huh? 5 people each? Is there anyone who can do that much?”
“I cleaned my mouth.”
How the hell did you brush your mouth, such a new club. Did you say that you would join the entrepreneurship club there?
“No, but isn’t 5 too many? We only need one.”
“So I decided to go for an interview.”
“Crazy? Interview?”
“Uh, I’ll pick the best one. Don’t worry about that.”
“Uh… you don’t have to worry.”
Minseok was only bad at coding, but he handled things well in many ways.
It seemed like it could be trusted.
“By the way, what did you do? Is there any progress in making devices?”
“There’s a little bit. Do you want to take a look?”
“see.”
Minseok came to my computer and started looking at the circuit diagram I had drawn up.
“Wow…? What is this? Why are there so many of them?”
“Resistors, wires, and other electronic components.”
“Seriously, is this possible? You didn’t know anything about this.”
“Isn’t it just because you’re studying?”
“Crazy, I’ve seen it a few times, but every time I see it, I’m surprised. Why are they so consistent in this way?”
“Isn’t that a compliment?”
“then.”
“What do you think? A circuit diagram?”
When I said that, Minseok stared at the monitor for a while before saying,
“I don’t know.”
“No, I was looking at you like that, but didn’t you know something like that?”
“I don’t know. I just saw it. How do I know.”
“Well, yes. That aside. Now we have to actually pull this out. The PCB circuit board.”
“Yeah. You have to have the real thing. So how do you do that?”
“I looked it up on the internet and found that there are some companies, so I think I can put in a quote there and pick it up. And I have to buy various materials as well.”
“Um… you mean you need money?”
“That’s right. So I want to know what to do.”
Minseok thought for a while.
“Shall I spend the money I saved the other day?”
“No, don’t use that.”
“So? Is there a good way?”
“I don’t know if it will work or not, but let’s put it in the link business group.”
“Link business unit?”
“Yes. There is a support fund for the start-up club. Well, the head of the club, Professor Choi Man-soo, will decide whether to buy it or not.”
“Wouldn’t you like to?”
“Okay, let’s do it first. I’ll fill out the paperwork and put it in. Can you give me the PCB circuit board and data? I have to attach it.”
“Okay hold on.”
Minseok and I started filling out the materials cost application form for the Link Business Group.
* * *
A few days later, an application for material cost arrived at the Link Project Group.
“Sir Hyejin Jung. Did you see this material cost application?”
“Yes. I saw.”
“How can I do this?”
“It has to be approved by the captain. But I’ve never seen an enemy that passed.”
“Okay? Shall we just throw it away then?”
“That can’t be done. But go to the captain first.”
“all right.”
Teacher, an employee of the Link Project Group, went to the head office.
“Chief Mansu Choi. Please send someone to COMMAX this time. Oh, and how did the project you were promoting last time go?”
Professor Mansoo Choi was talking with the CEO of COMMAX.
smart-
In the meantime, someone knocked.
“Come in.”
“Captain. LF requested materials, so I came.”
“LF?”
“Yes. This is a startup club registered this time. The president is Cheol-Woo Lee.”
“Oh, that student. Give it to me.”
“Yes. Here you are.”
“I’ll review it. Get out.”
“yes.”
The employee left, and Professor Choi Man-soo looked at the document.
“What is it? A material request?”
He was usually a person who didn’t pay much attention to the students’ work, but the CEO of Commax was puzzled by his interest.
“Oh, this time I have a friend I’m trying to raise.”
“Professor? You’ve been cursing all the students at this school for being idiots. Do you have any good friends?”
“I don’t know yet.”
After saying that, I began to look closely at the material application.
“hmm…….”
After the professor flipped through the application form, a circuit diagram designed by Cheol-woo came out.
And I watched it carefully.
“hahahaha, this guy is amazing. He has this much circuit design ability?”
The professor, who majored in electricity and electronics, had the ability to read circuit diagrams, and it was immediately apparent how sophisticated Lee Cheol-woo’s circuit diagrams were.
“What the hell is that? Is the professor saying he’s amazing? Can I have a look?”
The professor gave some circuit diagrams to the CEO of COMMAX.
“Look at this. No, how the heck did you calculate the resistance value? There’s a safety device, overvoltage protection, and… It’s a 6-layer structure, so the space is very well used.”
“Whoa? Who the hell drew this?”
“I just told you. There’s a student I’m trying to raise.”
“A student? How old is that student?”
“Age? Don’t know, maybe in your early 20’s?”
“Aren’t you in your 40s?”
“Uh. Why?”
“No, professor, are you feeling down because you’re not on active duty? To draw circuit diagrams like this… They say you have to have at least 10 years of experience.”
COMMAX was a company that made various electronic devices. And the representative was an artisan in the field.
“……That’s right. But look at this part. This is definitely a mistake beginners make.”
The professor handed one more copy to the president of Commax.
“Wow…? Crazy?”
“What? That reaction. It’s strange. The line on the circuit diagram is almost 5 cm long. Why do electronics need something like this?”
I handed over the mistakes, but the reaction of the CEO of COMMAX was strange.
“Ah, wait a minute. This… you said it was a device that goes into a greenhouse, right?”
From noble mtl dot com
“yes.”
“Then, this is how it should be done. This is correct.”
“huh?”
“You know that the resistance of a wire decreases in proportion to its thickness, right?”
“Of course, I didn’t die that much.”
“This is the part where the relay circuit goes in. In other words, it is the part that requires 220v control. If it is not this wide, it cannot withstand resistance.”
“Is it? You’re not?”
Professor still worked in the field for 10 years. I knew it wasn’t.
“Normally not.”
“then?”
“Did you just say this goes into a greenhouse?”
“uh.”
“In other words, you have to look at the conditions of the greenhouse. It must be hot and humid there, right? Is it a greenhouse?”
“yes.”
“What’s the resistance when it’s humid and hot?”
“Will it grow? …? Ah?”
“Yes. Do you understand now? This crazy friend designed the circuit by calculating the temperature and humidity as well.”
“…”
In general, when designing a circuit diagram, resistance or capacitor values are not directly calculated. Many references exist, and they are roughly made from experience.
other uncommon. When making spaceships, rockets, etc., even the slightest error is not allowed, so everything has to be calculated.
That is, what it means.
“To be able to design this much… is equivalent to NASA’s circuit design power.”
“Crazy? But NASA went too far.”
“That’s what they say. But really, what the hell is this guy?”
“I don’t know either. I’ve only seen it a few times in the last class.”
“Huh… that’s really crazy. What the hell did I just see?”
“What are you making a fuss about? It could have been taken from somewhere.”
“Um, is that so?”
“Well. Let’s watch a little longer.”
“Are you going to approve this?”
“I have to…”
* * *
The Link Business Group purchased various electronic materials and placed an order for the designed PCB. And they arrived today.
“Wow, are you going to make a device out of this?”
“Okay, let’s see… I’ll start working on it.”
“Do you know how to solder?”
“Hmm, I don’t know, but wouldn’t it be that difficult? I’ll give it a try.”
I immediately organized the materials and took out the PCB board. It was designed more densely than I thought, so it seemed like it would be difficult to insert and solder various parts.
“Well, isn’t that too narrow? Maybe I should have made it a little more spacious.”
“No, I’ll try.”
I plugged in the iron, waited for the heat to come up, and went straight to work.
‘A 230 ohm resistor should be inserted here, and a 2k resistor here. This part needs to be soldered to the a218 chipset.’
It was a narrow-looking board, but the soldering was smoother than expected.
“Wow, that’s great? Really neat soldering?”
“Really? It’s easier than you think? Try it yourself.”
“Then shall we?”
As if it seemed easy, Minseok started soldering with a spare iron.
“Uh… look at this. It’s all connected.”
“……Why are you so dexterous?”
“No, think about it with common sense. How do you make this narrow thing so elaborate?”
“I don’t know.”
“Anyway, that demonic talent should be recognized.”
“Okay, do whatever you’re doing.”
“uh.”
Minseok started filling out the paperwork again, and I did the rest of the soldering.
Shortly after I finished soldering, I connected it to my computer.
“Oh? Are you connecting to the computer now?”
“Uh, I’m going to put a program in here.”
“Oh. Did you program it?”
“of course.”
“Hey… how did you make that again?”
“It’s really easy. You just need to log the information from the temperature sensor to the server. Then you can view the information in the app.”
“and?”
“And if the temperature goes lower or higher than the set temperature, an alarm goes off.”
“Ohh. That’s the principle.”
even worked
The rest of the work was done quickly. All I had to do was transfer the pre-coded program to the device and connect the LAN cable.
Then I connected DC 2.4v power to the device I made and turned on the switch.
「No. 1 sensor: 18.8 degrees」
「Sensor 2: 18.9 degrees」
Then, the temperature started appearing in the app I made through CAK.
“Ohh… is this going to work?”
“Uh, 18.9 degrees. Right?”
“Uh. That’s right.”
Minseok said while looking at the analog thermometer.
“Leave this out of the sensor.”
The length of the sensor wire is approximately 100m, and Minseok carried them outside. Then the temperature output from the app started to drop.
「No. 1 sensor: 18.8 degrees」
「Sensor 2: 15.9 degrees」
“Wow, you really made a jackpot? This isn’t an app, it’s a machine with a real object. This… how can you make it so easy?”
Minseok, who left only the sensors outside and returned to the club room, said.
“Well, that’s about it.”
“Hey, then I can sell this right away.”
“But will it be sold?”
The problem was that.
Aside from the technical issues, whether this house was advertised or sold or not, that was the question.
“Wouldn’t it sell? There’s a chance. If the boiler doesn’t come in, the whole crop will be ruined.”
“Is that right?”
“Don’t worry about that, I’ll try my best.”
“Yes, I believe in you.”
“But what are these ports here?”
Minseok said while teaching relay terminals.
“It’s just that, if you have this, you can control 220v, but I put it in just in case. I wondered if I could have more control here and there, not just to see the temperature.”
“Oh? Remotely?”
“uh.”
“Oh, so what do you control?”
“I don’t know yet. I guess I’ll have to ask my dad when I get this. Well, wouldn’t it be nice to control the temperature or something?”
“Controlling the temperature remotely? That’s super cool?”
“Let’s go up tomorrow.”
“okay!”