Transmitter and receiver photoelectric sensor set; Voltage: DC 5V, current: 100mA, detection range: 3~80cm (adjustable); with potentiometer and output indicator light on the back

• Output current: 100mA
• Working voltage: DC 5V
• Current consumption: DC < 25mA
• Response time: < 2ms
• Sensing angle: Less than 15 degree
• Detecting range: 3~50 cm
• Working temperature: -25~55'C
• Wiring:
  • red (DC 4.5~5V power high level)
  • yellow (microcontroller) yellow is signal (with 10KOhm to the +)
  • green (GND 0V power low level)

*
 Code sample for 139741 Arduino Infrared Obstacle Avoidance Detection Photoelectric Sensor
 
 
    Output current: 100mA
    Working voltage: DC 5V
    Current consumption: DC < 25mA
    Response time: < 2ms
    Sensing angle: Less than 15 degree
    Detecting range: 3~80 cm
    Working temperature: -25~55'C
    Wiring:
        red (DC 4.5~5V power high level)
        yellow (Pin A0 microcontroller)
        green (GND 0V power low level) 

 This code is in the public domain.
 
 */

const int analogInPin = A0;  // Analog input pin that the sensor is attached to

int sensorValue = 0;        // value read from the pot

void setup() {
  // initialize serial communications at 9600 bps:
  Serial.begin(9600); 
}

void loop() {
  // read the analog in value:
  sensorValue = analogRead(analogInPin);            

  // print the results to the serial monitor:
  Serial.print("sensor = " );                       
  Serial.print(sensorValue);      
  Serial.print("t distance  = ");      
  Serial.println(map(sensorValue, 0, 1023, 3, 80));   

  // wait 2 milliseconds before the next loop
  // for the analog-to-digital converter to settle
  // after the last reading:
  delay(2);                     
}