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繼電器控制LED燈

接線圖

繼電器控制LED燈

程式碼

int relayPin = 8;

// the setup routine runs once when you press reset:
void setup() {
  // initialize the digital pin as an output.
  pinMode(relayPin, OUTPUT);
}

// the loop routine runs over and over again forever:
void loop() {
  digitalWrite(relayPin, HIGH);
  delay(1000);
  digitalWrite(relayPin, LOW);
  delay(1000);
}

LED數碼管

接線圖

LED數碼管

程式碼

// the setup routine runs once when you press reset:
void setup() {
  // initialize the digital pin as an output.
  pinMode(4, OUTPUT);
  pinMode(5, OUTPUT);
  pinMode(6, OUTPUT);
  pinMode(7, OUTPUT);
  pinMode(8, OUTPUT);
  pinMode(9, OUTPUT);
  pinMode(10, OUTPUT);
  pinMode(11, OUTPUT);

  digitalWrite(4, HIGH);
  digitalWrite(5, HIGH);
  digitalWrite(6, HIGH);
  digitalWrite(7, HIGH);
  digitalWrite(8, HIGH);
  digitalWrite(9, HIGH);
  digitalWrite(10, HIGH);
  digitalWrite(11, HIGH);
}

// the loop routine runs over and over again forever:
void loop() {
  digitalWrite(4, LOW);
  delay(1000);
  digitalWrite(5, LOW);
  delay(1000);
  digitalWrite(6, LOW);
  delay(1000);
  digitalWrite(7, LOW);
  delay(1000);
  digitalWrite(8, LOW);
  delay(1000);
  digitalWrite(9, LOW);
  delay(1000);
  digitalWrite(10, LOW);
  delay(1000);
  digitalWrite(11, LOW);
  delay(1000);
  digitalWrite(4, HIGH);
  delay(1000);
  digitalWrite(5, HIGH);
  delay(1000);
  digitalWrite(6, HIGH);
  delay(1000);
  digitalWrite(7, HIGH);
  delay(1000);
  digitalWrite(8, HIGH);
  delay(1000);
  digitalWrite(9, HIGH);
  delay(1000);
  digitalWrite(10, HIGH);
  delay(1000);
  digitalWrite(11, HIGH);
  delay(1000);
}