DIY D2-5 Intelligent Tracking Line Car Kit

LM393 at any time compared the size of two photosensitive resistors when there is an imbalance (such as one side of the black runway) immediately control the side of the motor stop, the other side of the motor to accelerate the rotation so that the direction of the car to restore the correct direction. The whole process is a closed-loop control, so it can be quickly and sensibly controlled

Note: This kit doesn’t come with batteries