RGB LED Beginner Tutorial & Random Colors Every 2 Seconds [external source]

Community Education
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CODE:

const byte blue = 9;
const byte red = 10;
const byte green = 11;
void setup() {
  // put your setup code here, to run once:
  pinMode(blue, OUTPUT);
  pinMode(red, OUTPUT);
  pinMode(green, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
  analogWrite(blue, random(0, 256));
  analogWrite(red, random(0, 256));
  analogWrite(green, random(0, 256));
  delay(500);
}
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Are the current limiting resistors for the LEDs on the little PC board? If not, where are they?

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Please edit & post your code properly, or this can go to the project gallery!

5

Read the forum guidelines to see how to properly post code.
Use the IDE autoformat tool (ctrl-t or Tools, Auto format) before posting code in code tags.

6

Hello
You shall extend your "RGB LED Beginner Tutorial" with this smart and small solution for "Random Colours Every 2 Seconds".

constexpr byte LEDs[] {10,11,12};
void setup() {
  for (auto LED : LEDs) pinMode(LED, OUTPUT);
}
void loop () {for (auto LED : LEDs) analogWrite(LED, random(0,256)); delay(2000);}
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Yes, all the resistors are already wired on the pc board.

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Thank you very much, I fixed the code. :slightly_smiling_face:

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Done, Thank you for the warning.

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It's a great idea, but I try to leave the arrays and "for" statement statements out of the beginner tutorials.

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Beginner for C++ :nerd_face:

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yeah but this is beginner arduino tutorial

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Thanks for the info :slight_smile:

1 Like
14

Np, thank you for watching :slight_smile:

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Your code is too long :wink:

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Longer codes are easier to understand for beginners in my opinion, but I appreciate your feedback.

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