The infrared emitting diode TCRT5000 sensor to continuously emit infrared, when the infrared emitter is not reflected or were reflected back but the strength is not big enough, the infrared receiving tube has been in a shutdown state, the module output is low, indicating diode has been extinguished; the detected objects appear in the detection range. Infrared light is reflected back and the intensity is large enough, the infrared receiving tube at the output end of the module is saturated, the high level, indicating diode is lit.
1, VCC: connected power supply positive (5V)
2, GND: power supply negative pole
3, OUT: high / low switch signals (digital signals 0 and 1)
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