Line finder is designed for line following robotic. It consists two parts - an IR emitting LED and an IR sensitive phototransistor. It can output digital signal to a microcontroller so the robot can reliably follow a black line on a white background, or vice versa.FEATURESGrove compatible interfaceSmall size5V DC power supplyIndicator LEDDigital outputDistance adjustableDOCUMENTSPlease visit our wiki page for more info about this product. It will be appreciated ifyou can help us improve the documents, add more demo code or tutorials. For technical support, please post your questions to our forum.