Arduino KY-010 Optical broken module
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KEYES ARDUINO photo interrupter module
Photo interupter module use the buildin arduino led. If the sensor is broken the LED is turned on.
Device senses a signal, LED lights, otherwise off.
Schematic
If you view from the top like on the photo
Left = Ground
Middle = +5V
Right = Signal
Connect the module to the arduino as follows:
Arduino pin GND to module GND
Arduino digital pin 3 to module Signal
Arduino pin 5V to module 5V
Example Code
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// Example code for KY-010
// photo interrupter module
 
int Led = 13 ;// define LED Interface
int buttonpin = 3; // define the photo interrupter sensor interface
int val ;// define numeric variables val
void setup ()
{
  pinMode (Led, OUTPUT) ;// define LED as output interface
  pinMode (buttonpin, INPUT) ;// define the photo interrupter 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 light sensor detects a signal is interrupted, LED flashes
  {
    digitalWrite (Led, HIGH);
  }
  else
  {
    digitalWrite (Led, LOW);
  }
}
Colored by Color Scripter
cs

https://tkkrlab.nl/wiki/Arduino_KY-010_Optical_broken_module