Review on 🚗 VKmaker Smart Robot Car Chassis Kit with Speed Encoder, Ultrasonic Module, and Battery Box - New Avoidance Tracking Motor System 2WD. Includes Tutorial CD. by Thasapon Keitt

I'm a geek. I create things, I modify things, and I'm not new to Arduino. I wanted something I could learn more with and chose this kit because of the parts included and the low price. I only used the instructions in the video to see the contrast between them and those linked in other comments. The videos and instructions that come with the product are not good. Was able to use the instructions mentioned by other reviewers. When that was all done, I uploaded and pasted the code. It didn't work as expected and failed to avoid obstacles. I took another Arduino and used the test sketch and found that the ultrasonic transducer didn't work at all. I tested a few solders on it that looked sketchy but to no avail. That's crap. At first I thought about buying one of these kits for my nephew but with more than terrible instructions and bad parts I can't. I'll have to look for a more expensive kit with more detailed instructions and some quality control of the parts so I don't send him broken stuff! Update 5/13/19: The Arduino clone it came with has died. I ended up replacing the motors with servos and continuously rotating wheels that slowed the thing down to reasonable speeds. Save money, buy a better kit, or buy the parts individually and build from scratch.