There is a 16mm wide black runway in the white field. This tracking car can drive along the black runway automatically. No matter how the runway is bent, the car can be driven automatically. We all know that the reflectivity is different when the light source to the white objects and black objects. Here we use red light source. The light is reflected through the ground to the photoresistor. By detecting the resistance of the photosensitive resistor can determine whether the car is driving in the black area. If the detection is black runway, then the car to change the direction of driving and motor will slow down or even stop and Red LED OFF on PCB front side. Drive the car in the opposite direction so that the car is always running along the runway. You can also use the 1.5~2.0 cm black electrical tape directly on the ground to design the complex runway. It would be even more fun!

Product Features

• Start & Learning – Every parts and English instruction of the smart car kits in the package, you should not worry about it even you are a new electronics starter.
• Gives interesting experience of assembly- you can really build a robot from scratch and make it move as you want, which is great achievement for hobbyist and begniners!
• Design the Runway by yourself – When you want to try a more interesting runway, you can design your line tracking car’s unique runway with the simplest black tape (1.5~2.0cm ) or black colored pen.
• Working Voltage: 3V; Size: 104*72*55mm; 2 pcs AA batteries are required. Batteries are not included.