- Adjustable detection range and angle: the infrared module detects from 2 to 30 cm with a 35 degree detection angle. - Easy to use: the OUT sensor module output port can be connected directly to the IO port of a microcontroller, and you can directly drive a 5-V relay. - Construction and operation: the IR sensor module features a pair of infrared emitter and receiver tubes. The tubes emit infrared at a fixed frequency. When the sensing direction hits an obstacle (reflective surface), the infrared is reflected and received. After processing by the comparator circuit, the green indicator lights. At the same time, a digital low-level signal is output via the signal output interface. - Function and applications: this IR infrared obstacle avoidance sensor module can be used for obstacle avoidance on robots, obstacle avoidance for cars, line counting, and tracking of black-and-white patterns.