Grove Zero Color Line Follower

• Grove Zero Color Line Follower
• Offers an input module which detects line on the ground
• Recognizes the colors it seems on the surface beneath it
• Can be turned in a compact line following car
• Contains one color sensor and four light sensors

The Grove Zero Color Line Follower contains one color sensor (the middle one) and four light sensors. Each light sensor is paired with a white LED which is located next to the light sensor. The light emitted from the LED is reflected by the ground surface and then received by the paired sensor.

By measuring the received light, the color sensor can detect the color of the surface while the light sensors can only tell if the surface is in deep color or light color.

This is how a black line on the white surface is detected. The sensors are placed in a row a certain distance apart. According to their position, and which sensor's relative feedback signal, the color line follower can figure out the relative position of the line (middle, left, far left, right, or far right).