Arduino Photoresistor

When building this device, the first step is to program what you want the LED and the photoresistor to do in Arduino programming software.

building a photo resistor is very easy if you follow this guide step by step.

Step 1: The Code

Use the code found here Instructables does not paste code very well. You will find a comment next to each line of code.

Step 2: Circuit Design

Step 3: Using Serial Port to Find Value

In Arduino IDE press CTRL+SHIFT+M to open the serial monitor. If everything was wired correctly you will see values that show the light the photo resistor is detecting. Place your hand over the photo resistor to find the new value of when the photo resistor is covered. With this photo resistor in changed from 850 to 650, so set Pr_Input = 0.

Share

    Recommendations

    • Make it Glow Contest 2018

      Make it Glow Contest 2018
    • Plastics Contest

      Plastics Contest
    • Optics Contest

      Optics Contest

    Discussions

    0
    None
    seamster

    3 years ago on Introduction

    There is a great little tool in the editor for pasting code in your projects. It won't mess with the format at all. If you open up your project to edit and have a step open, look for the paragraph symbol (kind of like a capital P), and there's a pull-down menu with an option to insert a box for code. It's pretty slick! ;)