Zumo Line Tracking Sensor

The Zumo projection sensor provides an easy way to add line detection or edge detection to the Zumo robot. It has six individual reflectance sensors, each consisting of an IR emitter combined with a phototransistor that responds depending on how much light is reflected into it. The outer two sensors are placed at the edges of the module to maximize their usefulness as edge detectors (e.g. for seeing the white edge of a sumo ring), while the four inner sensors are placed closer together for better detection lines. This sensor is included in the assembled version of the Zumo robot, but not in the kit version.

The sensor array plugs into the front expansion header of the Zumo display, which provides power and necessary I/O connections. The default I/O connections are tied to pins not otherwise used by the Zumo shield, but the sensor module makes it possible to power these pins back on or completely disconnect certain sensors to free up certain I/O lines. For detailed information on assembly and use with the Zumo robot, please visit Zumo Shield user manual.