When it comes to robots, many people will surely think of the liquid metal robots full of a sense of technological future among the "Terminators". But if the prefix "cutest" is added to them, it is believed that many "older children" will be deeply impressed by the robots of earlier years. With its small and cute shape and big talking eyes, it is really cute. Even today, especially the author who has children at home, he has always wanted to have his own dynamic robot and occasionally sell cute robots. The XKBot machine car produced by the small truck meets this demand (another white one is like its "goddess", with higher appearance, more functions, and of course, thousands of prices). It not only uses hands and brains, but also has interesting intelligence. Let's look forward to its manifestation:

As the audience users are children, the product packaging is beige based, and the box is painted in the posture of "Little Flying Hero" waving, which is bright and eye-catching, and full of future cartoon colors. Its size is like a "shoe box". Let's quickly open it and have a look.

After opening the box, all parts to be assembled are "wrapped" by black sponge in the form of accessory package, avoiding damage and bump. In addition, the attached paper also includes a manual and a folded black track drawing in the shape of "8" (the two-dimensional code printed on it can be used to download the APP for control programming).

All accessory kits: the author could not wait to assemble before taking the photos after disassembly, so here we list the specific components, which are the main board, line patrol sensor, alloy body frame, two pairs of motors (left and right), a pair of large rubber wheels, 18650 lithium battery, and screws Several nuts, screwdriver and two end pliers for assembly, etc.

Due to the modular design and supporting tools (almost equal to semi-finished products), as well as detailed descriptions with pictures and texts, The assembly process of the XKBot robot car is similar to Lego building blocks, which is very smooth (only 10 minutes is required as noted in the book). However, for the author whose hands-on ability is almost zero, it still took about 15 minutes. Here, it should be noted that the power supply and line must not be reversed when finally connected, otherwise the host will be scrapped.

The process is omitted all the way. The assembled finished product is as shown in the figure above. From the front, the big eyes (actually the ultrasonic distance sensor) and the "smiling face" are pretty cute. Of course, there are no two arms of "Wali". The XKBot machine frame is made of aluminum alloy anode oxidation material, and the body has different colors, such as red, blue (myself), yellow, purple, etc. In the later stage, I don't know whether we can make up for the "seven gourd baby" color. The frame is equipped with a magic bonded battery, and the top is a main board and a transparent acrylic plate for dust protection.

The battery is a 18650 lithium battery with a capacity of 2000 mA. Those who have used the battery must be very familiar with it. The charging specification is 5V 2A. Although there is no charger attached, the mobile phone charger in hand can be used. It can be "fed" in about one and a half hours. It can work continuously for 8-16 hours under full power.

The tires of the small K machine car use high resistance rubber wheels with patterns, which are quite durable. There is also a line detector with "ball" at the bottom of the front, including a reflective infrared line detector, and a LOGO with the word "KG" engraved on the "buttocks". In general, although the car is small and cute, its appearance is still slightly simple. The circuit is basically semi exposed. If you can attach color stickers, the body will be improved. I believe that the appearance will be higher and more cute.

The processor of the "Small K" charging car is the Cortex-M0 of ARM. Its main frequency is 48MHZ. The built-in motor is quite powerful. There are three main ways, namely, line patrol, obstacle avoidance and Bluetooth. The first two can be used independently. The last one can be operated remotely or programmatically through a dedicated APP after the phone is connected to Bluetooth. "Line patrol" is based on the "black" track. In addition to the attached "8" figure, the user can also "graffiti" various pictures with black tracks with children, so that the robot can follow its tracks. Not being able to program is irrelevant. If you recognize the "underworld", you can let your child draw a "track". The basic name of "avoiding obstacles" means automatically recognizing and avoiding obstacles. Here we will focus on introducing the "Bluetooth" mode controlled by APP.

The interface of the APP terminal is simple and clean. For the first time, you need to register your phone, and then open the "Small K" and your phone's Bluetooth to easily identify. There are four functions in the interface, namely, sports mode, programming mode, shake shake and extreme speed car.

The movement mode is remote control through the five dimensional operating rod under the horizontal screen, such as forward, backward, rotation, oblique walking, etc. In addition, the volume can be controlled ("small K" is equipped with indicator light and horn, which will make a simple click sound, and can change the light color). The operation is very convenient. While shaking the mobile phone, the robot car can also rotate and walk with it. In fact, the programming mode is also very simple, far from being as complicated as the XX language I learned in college. It can be easily solved by freely selecting and combining modules such as start, movement, sound and light, control and variables, giving corresponding conditions, and adjusting parameters.

Conclusion: Nowadays, there are fewer "child care" robots, and most of them appear in the form of "tablet"+"education", while "little K" is a kind of interesting robot car that can not only train children's ability to use their hands and brains, but also inspire their thinking. In terms of appearance, the large round wheels and the blue fuselage are like the "blue fat man" of the robot version. The price of several hundred yuan is also cost-effective. However, the functions of this car are relatively simple. If more optional accessories can be added in the form of "expansion package" in the later stage, more functions, playing methods and more fun can also be added.

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