Smart Robot Car Chassis Kit with UNO R3 Module - Educational DIY Toy, 2WD with Battery Box and Speed Encoder for Tracking Obstacle Avoidance - Designed for Beginners to Learn Programming

It comes with all the parts listed, and instructions on DVD+R, which you absolutely need. There's an instructional 18 min video that is very helpful, you'll need to decompress the .rar archive with WinRAR or Archive on Mac, then you will have the .mp4 video file. Though I have ~4 yrs experience with Arduino and others, I think others with less experience should be able to complete the project. The hardware assembly is the easy part, and fun. Because they upgraded the kit to a 6 battery holder (the instructions use a 4 battery holder), you will need to drill one 1/8" hole. Though the motors have the leads soldered (nice), and the switch is also soldered (unlike in the video), however, you will need to solder two wires together, the switch red wire to the battery red wire. As someone else noted, there's a mistake in the instructions: The red motor driver board (L298N controller) IN1, IN2, IN3, IN4 should be connected to A0,A1,A2,A3, NOT A1,A2,A3,A4. Pins A0-13 are referred to as pins 14,15,16,17 in the program code given. In the code, you will benefit from uncommenting the AnalogWrite commands, to pins 5 and 6. Check out instructions for the L298N controller online, remove the jumpers near A1 and A4 and use the AnalogWrite commands to control the speed of the motors. Full speed is uncontrolled. The ultrasonic detector is crappy and doesn't work well with rough cloth surfaces (couch, clothes). This is a great deal at ~$20, I paid more 4 years ago for a rover without the ulrasonic detector. The code works but is poorly written. Combine these parts with other fun stuff on Adafruit or Sparkfun or Amazon.

As others have mentioned, there are a few bugs with this kit. The issues I found are as follows: 1 - The holes in the caster are too big for the offset mounting hardware. 8 3M washers fixed that nicely. 2 - Battery holder doesn't have the correct holes drilled. A small drill fixed that. The mounting screws are too small for the holes, and more washers fixed that. (It really should have some flat head screws instead of cap screws so the end batteries will fit flush with the battery case.) 3 - The battery case wire does not have the pigtails to wire to the motor control board so I chopped the end off, spliced in to the wires keeping red to red and black to black. I soldered the wires to make sure I had a good connection and finished it with heat shrink. 4 - The drive motor wiring diagram shows A1 through A4 in use for IN4 - IN1. That would be okay, however the test code that comes with the kit uses pins 14-17 which means they really intended the connections to use A0-A3. The first time I powered it on, it was spinning in a lefthand circle. 5 - The testing code had to be modified to the way my motors were turning. I ended up with pinRF=14, pinRB=15, pinLF=16, and pinLB=17. Once the wires were switched to A0-A3 and the left/right forward/back changes were make it worked. This kit was fun to build, and the video was quite helpful. A picture of the sensor shield with the wiring completed would have been helpful. It was quite easy to find documentation on the web for the motor controller and sensor shield. The biggest problem I had was determining that A0 on the sensor shield matches pin 14 in the code. The testing code will prove that the parts are working, but it is just a jumping off platform. Now I'll find tune it's operation and possibly add additional sensors. There are huge numbers of possibilities, which is the whole idea! I plan on using these for middle school students after they have mastered some basic skills with the Arduino board. The price point makes it much easier to give each student their own with which to work. The minor issues with the kit are more "learning opportunities". HIGHLY RECOMMENDED!

I'm an Arduino newb and needed a kit to learn by playing with a kit. For the price and the parts you get this is a great kit. After playing with that robot, I can reuse almost everything for future projects. The instructions are bad, which drove me to the Arduino forums, datasheets and youtube, for me this was fine, I wanted to learn about the hardware and software and all those locations are a great resource. The kit came with a CD, which had poor instructions and the Arduino code. The instructions are frankly poor. However, if you search for the robot on Youtube, others have made great videos on the construction. You'll quickly realize the acrylic board, has unnecessary holes and the parts don't all fit perfectly. However, all my parts are installed on the existing acrylic board and when racing around everything holds together. Wiring wasn't great from the Youtube videos, so I had to find additionally material. The Arduino Sensor Shield Datasheet (google) helped and from the Arduino forums I learned that A0=14, A1=15, A2=16, A3=17. The instructions say to connect to IN1-IN4 to A4-A1, however, the given Arduino code uses (board) A3-A0 or (code) 17-14. I made no changes to the code and worked. Overall, great learning robot. Yeah, it's far from perfect and the instructions suck, but if you do a little internet searching you'll find all the information you need. Others have said it's not a robot for beginners, I feel like it's a great robot for beginners. You get what you paid for and this was a great deal.

I'm a geek. I build things, I modify things, and I'm not new to Arduino. I wanted something that I could learn more with, and I chose this kit for the included parts and the low price. I used the instructions in the video just to see the contrast between those and the ones linked in others comments. The video and instructions that come with the product are no good. Was able to use instructions mentioned by other reviewers. With it all done, I uploaded the code and powered it up. It didn't work as expected, and it wasn't avoiding any obstacles. I grabbed another arduino and and used a test sketch, and found that the ultrasonic transducer didn't work at all. I checked a few solders on it that looked sketchy but to no avail. It's a dud. I originally thought about getting one of these kits for my nephew but with worse than terrible instructions and bad parts, I can't. I'll have to spring for a more expensive kit with better instructions and some QA for parts so I don't send him broken stuff! Update 5/13/19: The Arduino clone that it came with died. I ended up replacing the motors with continuous rotation servos and wheels that slowed this thing down to reasonable speeds. Save your money, buy a better kit, or else buy the parts separately and scratch build.

If you are patient and careful assembling it, then this very much is worth it.This robot isn't hard to assemble and if one knows Arduino. I want to recommend this kit to parents so that they would be able to fuel their children's curiosity and practical ability outside of the classroom.  Overall, I would say this is a great product to help children learn and have fun at the same time.

I have purchased 2 of these kits. Just can't beat them for the cost. The instructions are useless. Neither kit I purchased had the battery case given in the instructions, which messes up parts placement on the chassis. Good instructions and code are given in the links in the Questions section of the product descriptions on Amazon. This would not be a good kit for a beginner - on the other hand, it is challenging and fun to sort/search/learn your way to getting this working. I recently bought the Lafvin kit for just a few $ more. Much better instructions and the code works.

This is an excellent project for beginners and the price can't be beat. I purchased three to build with my nephews. I would not recommend this for a beginner to complete on their own. There are no written instructions. The video is very helpful, however, many of the steps are not performed in front of the camera and there are a couple required modifications to be made.

This is a great, low priced robot kit. The kit doesn't come with any instructions or code so if you are looking for a step by step, Instructable style, kit this is not the kit you should be buying. This kit is a bunch of independent pieces put together into one package then sold as a "kit" and as a result unless you drill additional holes in the robot chase you are not going to get all the screw holes in the PCBs to align with chase holes. In all this is a fun few hours of layout, assembly, piecing together, and coding.