TCRT5000 sensor infrared emission diodes continue to emit infrared, when the emitted infrared rays are not reflected back or reflected back but the intensity is not big enough, the infrared receiver tube has been in the off state, then the module output is low, indicating The diode is in the extinguished state; when the object is detected within the detection range, the infrared rays are reflected back and the intensity is large enough, the infrared receiver is saturated, and the output of the module is high, indicating that the diode is lit.Specifications:

• Sensor adopts TR5000, high sensitivity
• Sensitivity adjustable digital potentiometer to adjust (blue)
• Modules can induction block from 0 to 3 cm
• 4-5 V working voltage 3.3 V
• A output form output analog voltage (0 to 5 v)
• B digital switch output (0 and 1)
• Has a fixed bolt hole, convenient installation
• Small board PCB size: 3.5 cm * 1.5 cm
• Power indicator light (red) and digital switch output indicator light (green)
• Comparator USES the LM393 chips, work stability

Wiring:

1. VCC external 3.3 V to 5 V
   
2. GND external GND
   
3. DO small plate digital output interface (0 and 1)
   
4. Small AO plate analog output interface (0 to 5 v)

Four instructions:

1. Module can be used to intelligent tracing car obstacle avoidance, material testing, color detection
2. Modules in shining or keep out the distance is greater than the set threshold the DO output high level, when the module block distance is less than the setting threshold, module D0 output low level;
3. Small plate digital output D0 can be attached directly to the microcontroller, through single chip microcomputer to detect the high and low level, thus to detect whether the modules are triggered;
4. Small plate digital output DO can directly drive our relay module, which can be composed of a photoelectric switch;
5. Small plate analog output can AO and AD modules are linked together, through the AD conversion, can module are obtained and the obstructions of distance