Seeed Studio (101020172) Line Finder, 5 V, TTL,

Product Information Accessory Type: Line Finder For Use With: Arduino & Raspberry Pi Board Product Range: - Product Overview Grove - Line Finder v1.1 is designed for line-following robot. It has an IR emitting LED and an IR sensitive phototransistor. It can output digital signal to a microcontroller so that the robot can reliably follow a black line on white background, or vice versa. Easy to use Power supply of 5V DC Digital output mode: TTL (high when black is detected, low when white is detected) 4 pin buckled grove interface LMV358 comparator RS-06WD photo reflective diode