Electronic Brick - Track Sensor
This track sensor uses the TCRT5000 to detect infrared signal reflecting from a surface. The 3 pins are GROUND, Vcc (5VDC), and DIGTAL OUT. The digital pin returns a HIGH when a signal is being reflected and a LOW when a black color is beneath the sensor (or there is no surface to reflect from). The potentiometer adjusts the range of the sensor for different heights. Great for creating line follower robots or can be used as a very short range proximity detector. Commonly used in groups of 1 to 3 sensors.