digitalWrite()¶
Write a HIGH or a LOW value to a pin configured as OUTPUT.
Library Documentation¶
Discussion¶
If the pin has been configured as an OUTPUT
with pinMode() its voltage will be set to the corresponding value:
3.3V for HIGH
, and 0V (ground) for LOW
.
Because it is soldered to an LED and resistor in series, your board’s BOARD_LED_PIN will respond slightly more slowly as an output than the other pins.
Example¶
The following example sets the built-in LED pin to HIGH
, makes a
one-second-long delay, sets the pin back to LOW
, and delays again,
causing a blinking pattern (you could also use
toggleLED()):
void setup() {
pinMode(BOARD_LED_PIN, OUTPUT); // sets the digital pin as output
}
void loop() {
digitalWrite(BOARD_LED_PIN, HIGH); // sets the LED on
delay(1000); // waits for a second
digitalWrite(BOARD_LED_PIN, LOW); // sets the LED off
delay(1000); // waits for a second
}
See Also¶
License and Attribution
Portions of this page were adapted from the Arduino Reference Documentation, which is released under a Creative Commons Attribution-ShareAlike 3.0 License.