Mar 112012

Made some running LEDs to have something quick and fun to show my kids.
This is what it looked like. I am using the even numbered digital outputs, connected to a LED with a 220 ohm resistor to ground.

They really liked it. When I first set it up, I only used red LEDs, but they wanted me to switch to what is shown in the picture.

Here is a short video of the live action :-), FunWithLEDs

The programming was intense, not! It is a really easy thing to use Arduino with its IDE and all help and examples available.

This is what the coding ended up in.

  Fun with LEDs

int pin;

void setup() {                
  // initialize the digital pins as output.
  for (pin=0; pin < 13; pin++) {
    pinMode(pin, OUTPUT);     

void loop() {
  for (pin=0; pin < 13; pin++) {
    digitalWrite(pin, HIGH);   // set the LED on
    delay(30);              // wait
    digitalWrite(pin, LOW);    // set the LED off
    delay(30);              // wait

That's it! I am not sure what the next project will be. Either a Display project, or a HomeAutomation project controlling some Nexa power outlet switches.


  One Response to “Arduino project – Fun with LEDs”

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