Clapper LEDs

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.

/* Clap light that turns on an LED when the sound trigger 'hears' a clap, then turns it off when it 'hears' another clap */ int clapCount = 0; //create a variable named clapCount that is an integer (whole number) with starting value of 0 void setup() { pinMode(A3,INPUT); //sound trigger pinMode(8,OUTPUT); //LED light } void loop() { if(analogRead(A3) > 600){ //if the sound reading is greater than 600 clapCount++; //increase the value of clapCount by 1 delay(100); //Pause for 1/10th of a second so one clap doesn't count twice } if(clapCount == 1){ //if clapCount equals 1 digitalWrite(8,HIGH); //turn on the LED } else{ //Otherwise, if clapCount is anything other than 1 digitalWrite(8,LOW); //turn off the LED clapCount = 0; //Reset the variable to 0. } } /*Note: To test if this is working, lightly tap the sound trigger. If your light is constantly flicking on and off without a clap, raise the number in the first 'if' statement If you can't get your light to change even when you clap or snap, lower the number in the first 'if' statement */ // (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!

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