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An Infrared (IR) module is used for object detection and proximity sensing. It emits infrared light and detects the reflected signal to determine the presence of objects. IR sensors are commonly used in automation, obstacle detection in robotics, and line-following applications. The module consists of an IR LED, photodiode, and a comparator circuit. The sensitivity and range can be adjusted using a potentiometer. It operates on low power and provides quick response time. The IR module works effectively in indoor environments but may face interference from ambient light. It supports digital and analog output modes for flexible applications. Common applications include security systems, hand gesture recognition, and automatic doors. The compact design makes it ideal for embedded projects. It is widely used in industrial and consumer electronics for automation and smart devices.