Digital Output 40

Blink and pulse digital pins for LEDs, relays, indicators, and simple actuators.

/*
  Roboda verified Arduino sample 0976
  Feature: Digital Output
  Generated for online build, classroom practice, and hardware upload testing.
*/

const byte ledPin = 8;

void setup() {
  pinMode(ledPin, OUTPUT);
}

void loop() {
  digitalWrite(ledPin, HIGH);
  delay(185);
  digitalWrite(ledPin, LOW);
  delay(185);
}

How it works

Turn a digital output on and off for an LED, relay module, or simple indicator.

1. Connect the LED/resistor or module input to ledPin.
2. Set ledPin as OUTPUT in setup().
3. Use digitalWrite(HIGH) and digitalWrite(LOW) in loop().
4. Change the two delay() values to control blink speed.

Connections