1_3 Blink Two Synced LEDs

Blink 2 Synced LED Lights

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 in sync */ void setup(){ pinMode(8,OUTPUT); //Set pin 8 to receive power pinMode(12,OUTPUT); //Set pin 12 to receive power } void loop(){ digitalWrite(8,HIGH);// turn on LED 8 digitalWrite(12,HIGH);//turn on LED 12 delay(1000);//delay 1000 milliseconds (1 second) digitalWrite(8,LOW);//turn off LED 8 digitalWrite(12,LOW);//turn off LED 12 delay(1000);//wait 1000 milliseconds 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 delay function values in the code to change how fast or slow the LEDs blink.

Change the line pinMode(12,OUTPUT); to pinMode(12,INPUT);. What difference do you now see between the two LEDs?

Try to make the LEDs alternate so that one is on while the other is off. Hint: You need to make a change to two digitalWrite( ) functions.