Lesson 5: The Blink Sketch- Light an LED

 

The resistor limits the amount of current

   Example Sketch: Blink

// the setup function runs once when you press reset or power the board

void setup() {

// initialize digital pin LED_BUILTIN as an output.

pinMode(LED_BUILTIN, OUTPUT);

}

// the loop function runs over and over again forever

void loop() {

digitalWrite(LED_BUILTIN, HIGH); // turn the LED on (HIGH is the voltage level)

delay(1000); // wait for a second

digitalWrite(LED_BUILTIN, LOW); // turn the LED off by making the voltage LOW

delay(1000); // wait for a second

}

In setup, we define the built-in LED(Pin 13) as an Output. You could assign another pin (2-12) as an output as well.

The check mark verifies that the code is grammatically correct, such as all statements end with semicolons, all functions are enc,osed in curly brackets {.   }. the right arrow uploads it to the board. Make sure you select the correct board and port.

Try changing the delay times in the code! Then change pin numbers!