7_4 Blink Delay / 2

Blink Delay / 2

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

Monitor Upload Your Code!

/* Blink an LED with a delay variable that gets cut in half every loop */ int wait = 5000; //Create a variable called 'wait' that is an integer (whole number) and has a starting value of 5000. void setup(){ pinMode(8,OUTPUT); //LED light } void loop(){ digitalWrite(8,HIGH); //turn on the LED light delay(wait); //delay for the number of milliseconds equal to 'wait' variable. First loop=5000, second loop=2500, and so on digitalWrite(8,LOW); //turn off the LED delay(wait); //delay for 'wait' number of milliseconds wait = wait/2; // divide 'wait' variable by 2. The single = sign means you're assigning the variable a new value. } // (c) 2023 Let's Start Coding. License: www.letsstartcoding.com/bsdlicense

 

It looks like your computer isn't set up to code yet. Setup My Computer

Success!

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!

Change wait = wait/2 to wait = wait*2. If you don’t change the starting value of the wait variable, how long will the light stay on after 3 loops?

Add more LEDs to this program that all blink together.

Make the ‘wait’ variable divide by a different number. Try to predict the impact this will have on the blink rate before you upload the code.