1_6 Alternate LED Blinks

Alternate LED Blinks

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.

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Monitor Upload Your Code!

/* Blink two LEDs back and forth */ void setup(){ pinMode(8,OUTPUT); //Set LED 8 to receive power pinMode(12,OUTPUT); //Set LED 12 to receive power } void loop(){ digitalWrite(8,HIGH);// turn on port 2 digitalWrite(12,LOW);//turn off port 6 delay(1000);//delay 1000 milliseconds (1 second) digitalWrite(8,LOW);//turn off port 2 digitalWrite(12,HIGH);//turn on port 6 delay(1000);//wait 1000 millisecond before restarting the loop } // (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!

Update the delays in the program. How small can you make them before it's impossible to know which LED is on?

Add a third LED pin that blinks at the same time as LED 8 blinks. Don't forget the pinMode() function!

Add a third LED pin that blinks separately from the other two, so that it is on when the other two are off.