4_0 Random Blink Delays

Random Blink Delays

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 an LED with random delays */ void setup(){ pinMode(8,OUTPUT); //LED light } void loop(){ digitalWrite(8,HIGH); //Turn on LED 8 delay(random(10,2000)); // delay between 10 and 1999 milliseconds (0.01 seconds to almost 2 seconds) digitalWrite(8,LOW); //Turn off LED 8 after the random delay delay(random(10,2000)); //delay between 10 and 1999 milliseconds before starting the loop again //Note: each time 'random()' runs, it selects a new number, so every loop will be different! } // (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!

Change the range of delays the random function can ‘choose from’.

Make another LED light blink randomly with separate delays from LED 8. Hint: You’ll need at least 4 more lines of code inside the void loop. Use the example code as a pattern.

Add another LED that blinks on and off with LED 8.