6_5 Toggle Between 3 LEDs

Toggle Between 3 LEDs

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 a button to toggle between 3 LED lights */ int pressCount = 0; //Create a variable called 'pressCount' that is an integer (whole number) and starting value of 0 void setup() { pinMode(4,INPUT_PULLUP); //button //LEDs pinMode(8,OUTPUT); pinMode(10,OUTPUT); pinMode(12,OUTPUT); } void loop() { if(digitalRead(4)==LOW){ //if button 6 is pressed pressCount++; //increase the value of pressCount by 1 delay(250); //delay gives you time to release the button before a press is counted twice } if(pressCount==1){ digitalWrite(8,HIGH); //turn on LED 8 digitalWrite(10,LOW); //turn off LED 10 digitalWrite(12,LOW); //turn off LED 12 } else if(pressCount ==2){ digitalWrite(10,HIGH); //turn on LED 10 digitalWrite(8,LOW); //turn off LED 8 digitalWrite(12,LOW); //turn off LED 12 } else if(pressCount ==3){ digitalWrite(12,HIGH); //turn on LED 12 digitalWrite(8,LOW); //turn off LED 8 digitalWrite(10,LOW); //turn off LED 10 } else{ //if pressCount is anything other than 1,2,or 3 digitalWrite(8,LOW); //turn off LED 8 digitalWrite(10,LOW); //turn off LED 10 digitalWrite(12,LOW); //turn off LED 12 pressCount = 0; //reset the pressCount variable to 0 } } // (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!

Add more LEDs with more else if statements so that you can toggle through all of the LED colors with the button.

Once you've completed the challenge above, change up the order of the 'if' and 'else-if' statements so the light "jumps" between LEDs when the button is pressed.

Add a final pressCount condition so that all of the LED colors are on at the same time.