The IR Obstacle Avoidance Sensor 2–30 cm Adjustable is a compact module designed to detect objects using infrared light. It contains paired infrared transmitter and receiver components, where the LED emits infrared signals and the reflected light from obstacles is sensed by the receiver. The sensor outputs a low-level digital signal when an obstacle is detected, and an onboard LED indicator provides visual confirmation. The detection distance is adjustable from 2 to 30 cm using a potentiometer, with a detection angle of 35°. Operating at DC 3–5 V, the module is compatible with Arduino, Raspberry Pi, and other microcontrollers for robotics, motion detection, and automated obstacle avoidance applications.