IR Reflectance Sensor - QRE1113

The QRE1113 is a compact infrared reflectance sensor. It's a top - choice for line following robots as it can easily detect whether a surface is white or black. The sensor has four pins: two for controlling the infrared - emitting LED, and the other two are for the collector and emitter of a phototransistor. The infrared diode has a maximum forward current of 50mA and works at 940nm. There are also breakout boards with analog and digital outputs available. Key features include phototransistor output, non - contact surface sensing, a miniature package, and SMT gull - wing leads. You can also access the datasheet for more details.

Using the QRE1113 infrared reflectance sensor is quite straightforward. First, connect it properly according to the pin functions. The two pins for the IR - emitting LED and the other two for the phototransistor collector and emitter should be connected as per your robot's or project's circuit design. When using it in a line - following robot, place it in a position where it can effectively detect the white or black surface of the line. As for maintenance, keep it clean and free from dust. Avoid exposing it to extreme temperatures or high - humidity environments. Always refer to the datasheet if you have any technical questions or face issues during operation. Also, be careful when handling the SMT gull - wing leads to prevent bending or damage.