TCRT5000 3-Channel Line Tracking Sensor Module is a carrier board for TCRT5000 reflective optical sensor. The board has 3 TCRT5000 reflective optical sensors. Although it is designed for use with line following robots, it can be used in sumo- mini sumo robots for line control. The board has digital output. When the sensor detects an object, the output becomes 0V and when it does not detect anything, the output becomes 5V.