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Product Name: KEYES Tracing sensor module for arduino with demo

Tracing sensors, robots make the necessary
  Using infrared light detection, anti-interference ability
  Sensor uses CTRT5000, high sensitivity, stable performance
  Operating voltage 5V, output low black line, a white line output high
  Exquisite workmanship, with indicator
  With fixed bolt hole for easy installation
Now we use the tracking module and a digital interface,  making  A tracing cue lights
 when tracing sensor senses a key signal, LED lights, otherwise off.
Arduino test  code:
int Led = 13 ;/ / define LED Interface
int buttonpin = 3; / / define tracing sensor interface
int val ;/ / define numeric variables val
void setup ()
pinMode (Led, OUTPUT) ;/ / define LED as output interface
pinMode (buttonpin, INPUT) ;/ / define tracing sensor output interface
void loop ()
val = digitalRead (buttonpin) ;/ / digital interface will be assigned a value of 3 to read val
if (val == HIGH) / / When the sensor detects a tracking signal, LED flashes
digitalWrite (Led, HIGH);
digitalWrite (Led, LOW);

Tracing sensors, robots make the necessary
 Using infrared light detection, anti-interference ability
 Sensor uses CTRT5000, high sensitivity, stable performance
 Operating voltage 5V, output low black line, a white line output high
 Exquisite workmanship, with indicator
 With fixed bolt hole for easy installation

Now we use the tracking module and a digital interface,  making  A tracing cue lights
when tracing sensor senses a key signal, LED lights, otherwise off.
Arduino test  code:
int Led = 13 ;/ / define LED Interface
int buttonpin = 3; / / define tracing sensor interface
int val ;/ / define numeric variables val
void setup ()
pinMode (Led, OUTPUT) ;/ / define LED as output interface
pinMode (buttonpin, INPUT) ;/ / define tracing sensor output interface
void loop ()
val = digitalRead (buttonpin) ;/ / digital interface will be assigned a value of 3 to read val
if (val == HIGH) / / When the sensor detects a tracking signal, LED flashes
digitalWrite (Led, HIGH);
digitalWrite (Led, LOW);