Array Challenge: No Delay – Kevin Chiasson

This question comes from Kevin Chiasson:

• Arduino Course for Absolute Beginners 2nd Edition
  • Using Arrays
    • Array Basics Part 1
      • Challenge 6: Add an array that will store 4 different delays times.  Use this array to have a different delay period between each LED turning on and off.

Question

“Hello Mike,  I’m stuck on the “Array Challenge”.  I can’t seem to get the delay to change in the array.  The delay does not change no matter what values I put in the delay array.  The lights just keep blinking at a steady pace.  Any help would be appreciated.

Thanks”

/*A sketch to deomonstrate array declaration
   initialization, and referenceing element in an array

   in other words
*/
const byte delayp = 4;
const byte LEDpinArraySize = 5;
//declare and initialize an array to hold pin numbers

byte LEDpinArray[LEDpinArraySize] = {2, 4, 7, 9, 11};
byte delayPeriod[delayp] = {2000, 1500, 2000, 200};

//set some delay times for blinking the LEDs
//int longerDelayTime = 1000;
//int shorterDelayTime = 20;

void setup() {
  // set the modes of the pins in the array to outputs
  pinMode(LEDpinArray[0], OUTPUT);
  pinMode(LEDpinArray[1], OUTPUT);
  pinMode(LEDpinArray[2], OUTPUT);
  pinMode(LEDpinArray[3], OUTPUT);
  pinMode(LEDpinArray[4], OUTPUT);

}

void loop() {
  // Turn off all the LedS
  digitalWrite(LEDpinArray[0], LOW);
  digitalWrite(LEDpinArray[1], LOW);
  digitalWrite(LEDpinArray[2], LOW);
  digitalWrite(LEDpinArray[3], LOW);
  digitalWrite(LEDpinArray[4], LOW);

  //Delay for a moment to see the LEDs stay OFF
  delay(delayPeriod[0]);

  //turn on all the LEDs, one by one
  digitalWrite(LEDpinArray[4], HIGH);


  digitalWrite(LEDpinArray[3], HIGH);
  delay(delayPeriod[1]);

  digitalWrite(LEDpinArray[2], HIGH);
  delay(delayPeriod[2]);

  digitalWrite(LEDpinArray[1], HIGH);
  delay(delayPeriod[3]);

  digitalWrite(LEDpinArray[0], HIGH);
  delay(delayPeriod [0]);

}

 

Your Challenge

Find the error.

Hints

Look at the array declarations.

Solution

[fvplayer src=”https://vimeo.com/343470912″ transcript=”auto” splash=”https://i.vimeocdn.com/video/792629227_1280x720.jpg?r=pad” caption=”Array Challenge – No Delay – Kevin Chiasson”]

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