4_9 Random Tones, Blinks, Buzzes, and Delays (Attention Grabber)

Random Tones, Blinks, Buzzes, and Delays (Attention Grabber)

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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/* Use random() to select the tone you play, the LED you light, and how long your delays last for a truly random sound and light party */ void setup(){ //RGB LED pins pinMode(9,OUTPUT); pinMode(10,OUTPUT); pinMode(11,OUTPUT); pinMode(2,OUTPUT); //Speaker } void loop(){ digitalWrite(random(9,11),HIGH); //Turn on a random pin 9, 10, or 11 tone(2,random(40,1200)); //Play a random tone with hertz from 40 to 1199 delay(random(10,2000)); //Random delay from 10 to 1999 milliseconds digitalWrite(random(9,11),LOW); //Turn off a random port 9, 10 or 11 noTone(2); //Stop the tone playing delay(random(10,2000)); //random delay from 10 to 1999 milliseconds } // (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’ between the beeps.

Add the other 2 LEDs to the random range of LEDs.