Project27.Photo Interrupter Module
=====================================

Description
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The KY-010 Photo Interrupter module is a switch that will trigger a signal when light between the sensor’s gap is blocked.
This module is suitable for various electronics platforms like Arduino, Raspberry Pi, ESP32 and others.

Specification
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- Operating Voltage	3.3V ~ 5V
- Board Dimensions	 18.5mm x 15mm

Connect
--------
.. image:: /img/connect/27_bb.png

Code
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.. code-block:: c
    
    int Led = 13; // define LED pin
    int buttonpin = 3; // define photo interrupter signal pin
    int val; //define a numeric variable

    void setup()
    {
        pinMode(Led, OUTPUT); // LED pin as output
        pinMode(buttonpin, INPUT); //photo interrupter pin as input
    }

    void loop()
    {
        val=digitalRead(buttonpin); //read the value of the sensor 
        if(val == HIGH) // turn on LED when sensor is blocked 
        {
            digitalWrite(Led,HIGH);
        }
        else
        {
            digitalWrite(Led,LOW);
        }
    }


Phenomenon
-----------

.. image:: /img/phenomenon/27.jpg