让RGB LED变得更亮？

Question

我一直在尝试制作一个红绿灯模拟器，但在使一个RGB灯亮起来(在代码中用(颜色)Pin2表示)时遇到了麻烦。第一个灯光工作正常，但左侧的RGB不能正常工作。我成功地在白光时使它变亮，但当我试图使它变黄时，光是如此暗淡，我几乎看不见它。它是正确连接的，所以我认为代码中可能有错误。如果有人需要https://www.tinkercad.com/things/g0UkhvSKylW-copy-of-traffic-light-with-pedestrian-crossing，这里是该项目的链接

(对于混乱的代码，我也很抱歉，我还不太习惯arduinos，所以我知道代码不是很好)

int redLight = 13;
int yellowLight = 12;
int greenLight = 11;
int redLight2 = 10;
int yellowLight2 = 9;
int greenLight2 = 8;
int redPin = 7;
int bluePin = 6;
int greenPin = 5;
int redPin2 = 4;
int bluePin2 = 3;
int greenPin2 = 2;

void setup() {
  pinMode(redLight, OUTPUT);
  pinMode(yellowLight, OUTPUT);
  pinMode(greenLight, OUTPUT);
  pinMode(redLight2, OUTPUT);
  pinMode(yellowLight2, OUTPUT);
  pinMode(greenLight2, OUTPUT);
  pinMode(redPin, OUTPUT);
  pinMode(bluePin, OUTPUT);
  pinMode(greenPin, OUTPUT);
}

void loop() {
  //Note: leftmost traffic light is used for refrence
  //all other lights are based on each others timing
  while(digitalRead(redLight) ==HIGH){
    redLightOn();
    break;
  }
  while(digitalRead(greenLight) == HIGH){
   //pedestrian light is white
    digitalWrite(redPin, 255);
    digitalWrite(greenPin, 255);
    digitalWrite(bluePin, 255);
    //pedestrian light is off
    digitalWrite(redLight2, HIGH);
    delay(6000);
    digitalWrite(bluePin, 0);//make sure to turn blue pin off!
    digitalWrite(redPin, 255);
    digitalWrite(greenPin, 40);
    delay(1000);
    digitalWrite(redPin, 0);
    digitalWrite(greenPin, 0);
    delay(500);
    digitalWrite(redPin, 255);
    digitalWrite(greenPin, 40);
    delay(1000);
    digitalWrite(redPin, 0);
    digitalWrite(greenPin, 0);
    delay(500);
    digitalWrite(redPin, 255);
    digitalWrite(greenPin, 40);
    delay(1000);
    digitalWrite(greenLight, LOW);
    digitalWrite(redPin, 0);
    digitalWrite(greenPin, 0);
    digitalWrite(bluePin, 0);
    digitalWrite(yellowLight, HIGH);
    //pedestrial light flashing
    digitalWrite(redPin, 255);
    digitalWrite(greenPin, 40);

  delay(5000);
    //yellow light changes to red
    digitalWrite(yellowLight, LOW);
    digitalWrite(redLight, HIGH);
  }

//Initial starting light: starts off red
  digitalWrite(redLight, HIGH);
}
//create an initial red light function
void redLightOn(){
    digitalWrite(redLight2, LOW);
    digitalWrite(greenLight2, HIGH);
    digitalWrite(redPin2, 255);
    digitalWrite(greenPin2, 255);
    digitalWrite(bluePin2, 255);
    //pedestrian light on white
    digitalWrite(redPin, 255);
    digitalWrite(greenPin, 40);
    //pedestrian light is off
    delay(6000);
    digitalWrite(bluePin2, 0);//make sure to turn blue pin off!
    digitalWrite(redPin2, 255);
    digitalWrite(greenPin2, 255);
    delay(1000);
    digitalWrite(redPin2, 0);
    digitalWrite(greenPin2, 0);
    delay(500);
    pYellow();
    delay(1000);
    digitalWrite(redPin2, 0);
    digitalWrite(greenPin2, 0);
    delay(500);
    pYellow();
    delay(1000);
    digitalWrite(greenLight, LOW);
    //digitalWrite(redPin, 0);
    //digitalWrite(greenPin, 0);
    //digitalWrite(bluePin, 0);
    digitalWrite(greenLight, LOW);

    //pedestrial light off
  
    digitalWrite(greenLight2, LOW);
    digitalWrite(yellowLight2, HIGH);
    delay(5000);
    digitalWrite(yellowLight2, LOW);
    digitalWrite(redLight, LOW);
    digitalWrite(greenLight, HIGH);
}

void pYellow(){
    digitalWrite(redPin2, 255);
    digitalWrite(greenPin2, 40);
}

Answer 1

你似乎把digitalWrite和analogWrite搞混了。digitalWrite函数接受引脚编号和高位或低位。在undefined中传递一个整数值。我猜测0的整数将被关闭，而其他任何值都将被打开。

看起来您想要将引脚设置为模拟引脚，然后使用analogWrite更新它们。使用此命令，您可以使用值0- 255设置0- 5v之间的任何电压电平。

此外，检查其代码或硬件的一个好方法是简单地将LED的黄色引脚连接到5V电源线，看看它变得有多亮。最后，你有没有一个共同的LED下拉电阻，或者你有每个颜色的独立电阻？如果是这样的话，可能其中一个值是错误的，或者你在黄线上的某个地方有一个不可靠的连接。

Answer 2

我看不出你的代码有什么问题。实际上，这不是一个软件问题，而是一个物理问题。如果您测量LED支脚之间的电压，您可能会看到该电压根据您的代码而变化。问题是，亮度是你用眼睛测量的东西。有一些情况，比如你从同一家供应商购买了不同颜色的LEDS，但灯泡看起来不同。

如果你想在所有颜色中获得均匀的亮度，你可以尝试从代码中使较浅的颜色变暗，或者尝试在腿上使用不同的值电阻。