9_8 Blink Row of LEDs

Blink Row of LEDs

Code

The code in the editor below is ready to run! Plug Code Lab Mini in to your computer's USB port with the cable 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.

Restore 12 14 18 24 30

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/* Blink on and off a row of LED lights in sequence */ void setup(){ //Set up your LEDs pinMode(8,OUTPUT); //LED pinMode(9,OUTPUT); //LED pinMode(10,OUTPUT); //LED pinMode(11,OUTPUT); //LED pinMode(12,OUTPUT); //LED } void loop(){ /*create a variable named i that has a starting value of 8. Until i equals 12, run the code between the curly braces, then increase the value of the 'i' variable by 1*/ for(int i=8;i<13;i++){ digitalWrite(i,HIGH);//turn on the LED whose port number is equal to 'i' delay(500); //wait 500 milliseconds (0.5 seconds) with the LED on digitalWrite(i,LOW); //turn off the LED whose port number is equal to 'i' delay(500); //wait 500 millisecond (0.5 seconds) with the LED off before running the 'for' loop again } } // (c) 2023 Let's Start Coding. License: www.letsstartcoding.com/bsdlicense

 

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Compile errors:

Serial port monitor: Input: Send Close

 

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

Can you complete the challenges? Change the code in your code editor above. Upload your code to see the effect when you're finished. Complete a challenge? Check it off the list!

Comment out’ the second delay by adding two forward slashes (//) to the left of the word ‘delay’. Before you upload, predict what will happen when you do this.

Change either (or both) delays to a much smaller delay.