2 Pack D2-5 Smart Car Kit Soldering Project Line Following Robot for Fun Educational Electronic Learning Practicing with English Manual by VOGURTIME

Love the kit as it covers so many objectives in STEM education. Electronics, simple machines, logic, and robotics.Easy to solder, assembly, and best part test!

My students totally loved this kit. It really raised their enthusiasm about learning electronics.

The media could not be loaded. One of the two kits included in the package has been built. During soldering, one of the pads on a transistor lifted off the PCB. That was fixed by bending the transistor lead and soldering it to where the trace went. One of the motors did not mesh well with the gears. That was fixed by inserting a paper shim under the motor to tilt it back so the gears would mesh. It took some tinkering to get the trim pots aligned so the robot would follow the included paper track. Some prior experience soldering and assembling electronic kits is highly recommend. This kit is NOT for a beginner.

Kids love it

Overall, the kit went together well - I did it with my 10yr old grandson, teaching him to solder. As long as you are patient (and have a decent iron) the kit assembles fine. We ran into trouble because the clear (downward facing) LEDs in our kit did not match the silkscreen orientation. The LED's silkscreen flat side corresponds with the cathode as is standard for LEDs. For some unknown reason, the LEDs in my kit had the anode on the flat side of the device package. (I double checked on the bench with a DVM and a voltage source after removing; the LED only would light if the lead on the flat side was positive, which is bizarre.) I had to rotate 180 degrees from the silkscreen marking to get proper operation. It was definitely an LED issue; I verified that the PCB silkscreen correctly identified the cathode (if the LED had been normal). Not sure if it was just a bad batch of LEDs, but once I put it in "backwards" all was well and the kit works fine.

Assembly was straight forward but actually tuning the adjustable resistance so the thing would work was impossible. There’s no real guidance on how to set it properly the instructions just say “It sounds harder than it is…” useless. These Chinese companies should source out their instructions to people who can translate a little better. Buyer beware

The kit was missing one screw and the gears hit the motherboard when fully tightened , also had one faulty LED.

You have to know at least a little bit about what your doing to assemble this.I bought 2 of these to use as a father/son project. It would be my son's first electronics build project.Not a good choice.Let me give some examples why.I always start with the smaller and shorter pieces first. This us so that it is easy to hold them.So I started with the 8 resistors.3 different resistors used.But no instructions on how to tell which one is which.I ended up using an online resistor identification tool.Plus the through hole board has fairly small holes with small pads. They make the same components that are slightly larger and used larger holes, larger traces with slightly larger pads spaced a bit further apart. This would be MUCH easier for a beginner.The instructions? Well, they are not so great. Especially the section on adjusting the 2 potentiometers. I still haven't figured this out.There was no information or descriptions on which part is what.You also have a mechanical component to assemble. The parts were totally too small for my inexperienced, 10-year-old son.Plus some of the parts were so lightweight that the screws stripped out very easily.It's really not a bad project, it's just NOT beginner material.The first thing they need to do is give us VERY DETAILED step-by-step instructions WITH PICTURES that we can look up on line. Then a beginner would know exactly what part is what.Then they need to make it all 50% larger.If I had the background in electronics I would design and sell beginner kits myself. Very few people do it right.