BUILD LASER LIGHT BARRIER DETECTION USING ARDUINO AND NODEMCU

Laser light barrier detection


  • Introduction
  • Hardware - Software
  • Little more about tutorial
  • Coding - Sketch
  • Execution

INTRODUCTION

  • In this tutorial, it is shown how to build a laser light barrier detector. It will demonstrate and show that if anything comes in-between laser light sender and receiver it will turn on LED and Buzzer will turn on.
  • This tutorial explains the basic use of laser module and photoresistor along with how to trigger on Buzzer and LED on a specific event.


HARDWARE
  • NodeMCU
  • Male-Female Jumper Wires
  • BUZZER
  • LED
  • Laser Module
  • Photo Resistor
  • Resistor


SOFTWARE
  • Arduino IDE


LITTLE MORE ABOUT TUTORIAL
  • The sketch(code) written in C programming language
  • Laser module emits the laser light
  • The resistance of a photoresistor decreases with increase in incident light intensity.
  • Place laser and photoresistor face towards each other.
  • In this example we will continuously emit laser light towards photoresistor.
  • The photoresistor will detect laser light and generates voltage output accordingly
  • Read photoresistor input from analog pin
  • When we place barrier in-between laser light and photoresistor, photoresistor will change it's resistance and provide input to attached pin
  • By reading this analog input pin value we can identify that there is a barrier in-between.
  • Once INPUT analog pin (A0) detect value of voltage unusual(in this case 1000) it will ring buzzer and trun on LED to demonstrate event.

SKETCH - CODE


Sketch

EXECUTION - DEMO

Please check out the video link  Demo - Video

Thanks.

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