After finishing the activities of the Children's Welfare Home, Yang Yan was temporarily idle. After taking Luo Luo for a day to visit the park, he put the smart "funny" cat car he wanted to do before on the agenda.

Yang Yan spent a lot of effort on the redesign and assembly of this toy car! Moreover, since he started researching it last month, Yang Yan found that this thing is not as simple as he thought at the beginning!

The programming of the "intelligent cat recognition" system has become the simplest part. For Yang Yan, the difficulty is actually mechanical difficulties!

That is not just about finding a simple toy car, but Yang Yan also needs to install various sensors, modify its body structure, and replace it with a higher power battery - so as to drive the electronic equipment on the car...

To this end, Yang Yan borrowed mechanical design and books related to mechanical principles from the library of Nanyue University early on, and even ordered a batch of materials online and made preparations.

It is worth mentioning that in order to find suitable sensors for toy cars, Yang Yan spent a lot of money and bought a new, more advanced sweeping robot in Shanghai. He used a screwdriver to disassemble it and found its sensors, microprocessors and other electronic components for his "touching" cat car.

As for why I didn’t just use the sweeping robot to modify it, it was because Yang Yan thought that the sweeping robot was a bit big and not good-looking…

The main body of the "Dou" cat car comes from a big bike bought online, which is truly a four-wheel drive!

Of course, this big bike is a bit different from the oil-burning big bike that Xia Yu said. It is at best a toy car, with only the big bike and four-wheel drive, shock absorption system, battery-powered and moderately powered motors, which are destined to not show the powerful power of a real big bike that can cross mountains and rivers - for family use and children's toys, it is still relatively safe.

It's a bit far...

Today, Yang Yan finally started to modify the homework!

After breakfast, Yang Yan moved the tools, parts and computers to the dining table. In order to prevent Mi Xiaomi from harassing and prevent it from getting rid of the parts, Yang Yan also put them in a cage.

But in addition to Mi Xiaomi, Luoluo is also curious about what his father does!

The little girl followed her dad happily, and walked around the study and living room for several rounds. After finally waiting for her father to sit down, she stretched out her little arms and wanted her dad to pick her up to see her make fun things!

Yang Yan still has a way to deal with this clingy little goblin, no, the clingy little fairy, he only smiled and said, "Luoluo, is it okay if Dad gives you a task?"

Task?

What's this?

Is it delicious?

"Okay..." Luo Luo didn't care about that much, and responded sweetly first.

"In this way, Dad is making a very beautiful small car!" Yang Yan took out the bright red shell big car he bought and waved it, and smiled, "But, Dad doesn't know how to make it look better. Luo Luo, do dad a favor and help dad find some beautiful little dolls in your toys. Then we put it on the car so that the car will look good, okay?"

This time, Luoluo understood what his father said. Even though some of the sentences were a little difficult to understand, Luoluo understood it in a daze!

"Yes, it's good-looking!" Luo Luo pouted her mouth and said seriously to her father.

"Yes, it must be beautiful, because my father made it, it is also a small car for Luoluo, it must be beautiful!" Yang Yan rubbed Luoluo's hair with a smile, and then pointed to Luoluo's toy storage basket in the living room, "Go quickly and help Dad find the best doll you think!"

Although it is a "funny" cat car, it is not impossible to add some personal elements to it! Yang Yan was also excited to buy some stickers to make the car look sci-fi style. Of course, if Luo Luo chooses some small dolls, as long as the size is right, it is not impossible to stick them on it!

Imagine how interesting it would be to crawl on this high-tech car with a Spider-Man figure (although Luo Luo didn't) chasing towards Meow Xiaomi with great pride!

Influenced by his father's positive tone, Luo Luo also grinned happily and responded to her father lightly: "Yes!"

Then, the little girl twisted her head, and the pretty and cute ponytail rippled with layers of golden light under the morning sunlight that was reflected in. She took a cheerful pace and jumped to her toy.

Without the disturbance of his daughter for the time being, Yang Yan took out a multi-head combination screwdriver that could not be screwed in anything except for the screws of the phone, and unloaded the beautiful big bike that Luo Luo had just seen.

This time, Yang Yan's modification homework seemed much more professional. He put the screws one by one into a special screw sorting plate one by one, with serial numbers on it. With Yang Yan's memory, he will definitely be able to put them backwards later.

The original battery pack of the big bike driver is definitely not enough for the microprocessor to drive the sensors that Yang Yan wants to install. Therefore, Yang Yan removed the original battery pack and added the lithium battery removed from the sweeping robot for power supply to other components and the motor. Of course, on the motor, Yang Yan also needs to add some physical transformer circuits to match the motor's rated voltage and current standards.

Yang Yan was painted for a long time when modifying the battery. Even though he had already drawn the transformation drawing, wiring and welding with rosin solder wire, it was really hard to come!

"Dad, dad..." Luo Luo didn't know when she returned to her father's side. She called her dad twice excitedly, but the little girl's crisp and loud screams did not attract her dad's attention.

Huh?

Luo Luo blinked her big eyes in confusion, but she couldn't wait. The little hand on her left grabbed her father's thigh and shook it in a hurry.

"Luoluo, what's wrong?" Yang Yan, who was concentrating on the thin circuit, reacted in a daze at this time. He turned his head and asked Luoluo with a smile.

"Dad, let me, let me!" Luo Luo regained her excited expression at this time. She picked up the little bear doll who was dragging behind her and showed it to her father in both hands.

"This is not OK, it's too big." Yang Yan said with some amusement and crying, "We want a smaller doll, Luoluo, you can go and search again!"

"I'm a little bit?" Luo Luo looked at his father in confusion.

"Yes, it can't be that big, it's a little smaller." Yang Yan gestured with his hands, as if compressing something, and said with a smile.

Luo Luo blinked his eyes hesitantly and murmured: "Yes, it's good-looking..."
Chapter completed!