Program your robot to follow a black line over a white surface. This kit provides more design flexibility--you can also use it to program your robot for light sensing. A Programming Kit is needed to change the program in the Vex Controller.
A line tracker mostly consists of an infrared light sensor and an infrared LED. It functions by illuminating a surface with infrared light; the sensor then picks up the reflected infrared radiation and, based on its intensity, determines the reflectivity of the surface in question. Lightly colored surfaces will reflect more light than dark surfaces; therefore, lightly colored surfaces will appear brighter to the sensor. This allows the sensor to detect a dark line on a pale surface, or a pale line on a dark surface.
The line tracker enables a robot to autonomously navigate a line-marked path. By drawing a line in front of a robot outfitted with a line tracker, one can dictate the robot's path by showing it where to go without using a remote controller. A typical application uses three line trackers, with the middle sensor aligned directly above the intended line.
Navigate down a marked path.
Use for light sensing.
More autonomous function.
| Technical Info |
| Sensor Type | Infrared light sensor and infrared LED |
| Line Width | 0.25 in. minimum, optimal line width is 0.5in. |
| Optimal Range | 3 millimeters (just under 1/8"), effectiveness drops off by approximately a factor of 10 at 5/8" |
| Wiring | Black - ground; Red - (+) power; White - control signal |
| List of Contents |
| 3 | Line Tracker Sensor |
Inventor's Guide Insert 
STEP file of line tracker and mounting hardware