4_8 Random Beep and Blink Delays

Random Beep and 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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/* Use random() to select the tone you play, the LED you light, how strong the motor buzzes and how long your delays last for a truly random attention-getter */ void setup(){ //Single Color LED Pins pinMode(8,OUTPUT); pinMode(12,OUTPUT); //RGB LED pins pinMode(9,OUTPUT); pinMode(10,OUTPUT); pinMode(11,OUTPUT); pinMode(2,OUTPUT); //Speaker pinMode(3,OUTPUT); // Motor } void loop(){ digitalWrite(random(8,13),HIGH); //Turn on a random pin 8, 9, 10, 11, or 12 tone(2,random(40,1200)); //Play a random tone with hertz from 40 to 1199 analogWrite(3,random(1,256)); //Turn on the motor at a random power delay(random(10,300)); //Random delay from 10 to 300 milliseconds digitalWrite(random(8,13),LOW); //Turn off a random pin 8, 9, 10, 11, or 12 noTone(2); //Stop the tone playing digitalWrite(3,LOW); //Turn off the motor delay(random(10,300)); //random delay from 10 to 300 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!

Convert the digitalWrite function that turns on a random LED to an analogWrite function that sets a random LED to a random brightness.

Add the LED pixels to this project - making random pixels turn random colors. You can refer to a few projects back if you need to get set up to use the LED pixels.