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It checks today's price at every store, compares the alternatives and answers in about a minute.
The M5Stack Infrared Reflective Sensor Unit is a small Grove-compatible module that detects nearby objects using infrared reflection. It pairs an IR emitter and phototransistor to give a digital or analog signal when something passes in front of it. It suits makers building line followers, edge detectors, or simple proximity switches for robotics and automation projects. Compared with bare IR sensor components, it adds a plug-and-play connector and mounting holes, but it lacks the adjustable sensitivity and longer range of some ultrasonic or laser rangefinders.
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The Infrared Reflective Sensor Unit emits infrared light and receives its reflection. It detects the infrared light reflected by a target object and reports the detection status through both analog and digital signals.
An onboard potentiometer on the rear adjusts the sensitivity of the digital output, which sets the detection distance. It is pre-set at the factory to a comparator threshold voltage of 1.65V, and should not be adjusted unless necessary.
It can be used for object detection, line tracking, distance measurement and automation systems.