Arduino RGB LED 透明
我有一个 RGB LED，有 9、10、11 引脚和接地引脚。 已为 R、G 和 B 提供了电阻器。
当我这样做时：
analogWrite(r, 255); // I see a red color
analogWrite(g, 0);
analogWrite(b, 0);
analogWrite(r, 0);
analogWrite(g, 255); // I see a green color
analogWrite(b, 0);
analogWrite(r, 0);
analogWrite(g, 0); // I see a blue color
analogWrite(b, 255);
当我这样做时：
analogWrite(r, 153);
analogWrite(g, 102);
analogWrite(b, 51);
在我看来，它看起来不是棕色的，更像是蓝色。 我是否错过了一些我需要做的事情？
I have an RGB LED and have pins to 9, 10, 11 and a pin to ground.
Resistors have been provided for R, G, and B.
When I do:
analogWrite(r, 255); // I see a red color
analogWrite(g, 0);
analogWrite(b, 0);
analogWrite(r, 0);
analogWrite(g, 255); // I see a green color
analogWrite(b, 0);
analogWrite(r, 0);
analogWrite(g, 0); // I see a blue color
analogWrite(b, 255);
When I do:
analogWrite(r, 153);
analogWrite(g, 102);
analogWrite(b, 51);
it does not look brown to me, more like a blue color.
Am I missing something I need to do?
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棕色是一种很难实现的颜色。 （它实际上是深红色。棕色不在彩虹中。）
确保您的颜色平衡：写下暗白色/灰色、128、128、128，并确保它看起来是白色的。然后写下 255, 255,255 并确保它看起来是白色的。如果这些看起来不是白色，请调整电阻器以减少流过太亮组件的电流（注意不要允许太大的电流并烧坏 LED。
Brown is a very difficult color to achieve. (It's actually dark red. Brown isn't in the rainbow.)
Make sure that your colors are balanced: write a dim white / gray, 128, 128, 128 and make sure this looks white. Then write a 255, 255,255 and make sure this looks white. If these don't look white, adjust your resistors to reduce current through the component that is too bright (be careful not to allow too much current and burn out the LED.
它很奇怪，但蓝色似乎与您想要实现的棕色完全相反。此外，当我尝试反转颜色（255 - x）时，我得到了蓝色。也许 PWM 配置有问题？
Its weird, but blue color seems exactly opposite to brown color, that you are trying to achieve. Moreover, when I've tried to invert the color (255 - x), I've got blue colors. Maybe something is wrong with PWM configuration?
RGB LED是共阳极还是共阴极，
通常RGB LED是共阳极的。
这意味着：降低analogWrite值，提高亮度（发出更多光）
http://www.hertaville.com/wp-content/ uploads/2011/07/rgb.jpg
你还需要电阻，注意在电阻相同的情况下，蓝色比绿色或红色发出更多的光，所以你需要设置更高的值电阻值。
is the RGB LED common anode or common cathode,
usually RGB LEDs are common anode.
this means: lowwer the analogWrite value, higher brightness (more emitted light)
http://www.hertaville.com/wp-content/uploads/2011/07/rgb.jpg
you also need resistors, notice that blue emits more light with the same value of resistans, than green or red, so you need to set a higher resistor value.