3_5 Light Sensor Digital Switch

Light Sensor Digital Switch

Code

The code in the editor below is ready to run! Plug Code Lab Mini in to your computer's USB port, make sure that your Code Lab Mini Sensor Trio Add-On (sold separately) is attached, and hit 'Upload Your Code!' to see what it does. Change something in the code, like a delay or pin number. Try to add something new to the program - it's yours to tinker with! You can always press the 'Restore' button to return the code to the working example.

If you haven't set up your Code Lab Mini Sensor Trio Add-On yet, visit Chapter 0 to watch a video showing you how to do that.


/* Turn on an LED with a light sensor reading The light sensor has a range of 0-1023, so 512 is the halfway threshold */ void setup(){ pinMode(A2,INPUT); //light sensor pinMode(12,OUTPUT); //LED } void loop(){ if(digitalRead(A2)==LOW){ //if there is low light on the light sensor... digitalWrite(12,HIGH); //turn on LED 12 } else{ //otherwise if there is high light on the light sensor... digitalWrite(12,LOW); //turn off LED 12 } /*Depending on your room lighting, the LED may be on by default. To see the switch work, shine a light on the light sensor! If the LED is off, cover the light sensor with your hand to turn on the LED. */ } // (c) 2023 Let's Start Coding. License: www.letsstartcoding.com/bsdlicense
 

Walkthrough Video

Watch the video for a line-by-line explanation of how the example program works. Then you'll be ready to make some changes of your own!

Challenges

Coming Soon!