< A Beginner's Arduino Guide < Projects
In this chapter, you will learn how to get the LED to flash on an Arduino board. This is one of the simplest projects that you can undertake.
// this runs only once on power up
void setup() {
pinMode(13, OUTPUT);
}
// the loop function runs continuously until the device is powered down
void loop() {
digitalWrite(13, HIGH); // turn on LED
delay(1000); // wait for a second
digitalWrite(13, LOW); // turn off LED
delay(1000); // wait for a second
}
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