Example Code for Arduino-LED State Reflection

Hardware Preparation

Wiring Diagram

The output pin of the laser photoelectric switch is connected to pin 10 of the Arduino board.The LED on 13 pin will reflect the state of the output pin. The Receptor will output high level when it detects laser signal.

Other Preparation Work

Connection:

• output pin(black) -- Arduino digital pin 10
• VCC pin(brown) -- VCC(+5V)
• GND pin(blue) -- GND(0V)

Sample Code

/*!
 * @file  FIT0319.ino
 * @brief  The LED on 13 pin will reflect the state of the output pin of the laser photoelectric switch.
 * @copyright  Copyright (c) 2010 DFRobot Co.Ltd (http://www.dfrobot.com)
 * @license  The MIT License (MIT)
 * @author  YouYou from DFRobot
 * @version  V1.0
 * @date  2013-05-17
 */

/*
    Connection:
       output pin(black) -- Arduino digital pin 10
       VCC pin(brown) -- VCC(+5V)
       GND pin(blue) -- GND(0V)
*/
int led = 13;
int laserOut = 10;

void setup()
{
   pinMode(led,OUTPUT);
   pinMode(laserOut,INPUT);
}

void loop()
{
   digitalWrite(led,digitalRead(laserOut));
}

Result

Try to block the laser and watch the effect. The LED on 13 pin will reflect the state of the output pin of the laser photoelectric switch.

Additional Information

NOTE: Class 3R are usually up to 5 mW and involve a small risk of eye damage within the time of the blink reflex. Staring into such a beam for several seconds is likely to cause damage to a spot on the retina.