反射式光电开关QRE1113

The QRE1113 is a small IR reflectance sensor. This sensor is often used in line following robots because, if it can sense if a surface is white or black.

There are four pins on the QRE1113 - two control the IR emitting LED while the other two are the collector and emitter of a phototransistor. The IR diode has a max forward current of 50mA and operates at 940nm.

Breakout boards with analog and digital outputs are also available.

Features:

• Phototransistor output
• No contact surface sensing
• Miniature package
• SMT gull wing leads

Documents:

反射式光电开关QRE1113

原文：http://www.cnblogs.com/prayer521/p/7270319.html