/*FadeThis example shows how to fade an LED on pin 9 using the analogWrite()function.The analogWrite() function uses PWM, so if you want to change the pin you'reusing, be sure to use another PWM capable pin. On most Arduino, the PWM pinsare identified with a "~" sign, like ~3, ...
This example code is in the public domain.https://www.arduino.cc/en/Tutorial/BuiltInExamples/Fade*/intled =9;//the PWM pin the LED is attached tointbrightness =0;//how bright the LED isintfadeAmount =5;//how many points to fade the LED by//the setup routine runs once when you p...
This example shows how to fade an LED using the analogWrite() function. 本例展示了如何使用模拟写 analogWrite 函数来调节 LED 亮度。 The circuit: 电路连接 - LED attached from digital pin 9 to ground through 220 ohm resistor. 从数字针 9 连接 LED 并通过 220 欧姆电阻接地。 created 1 Nov 2008...
为了使LED熄灭并点亮,请逐渐将PWM值从0(一直关闭)增加到255(一直打开),然后再返回0,以完成循环,在上面给出的代码中,使用称为亮度的变量设置PWM值。每次循环,它都会增加变量 fadeAmount 的值。 analogWrite()可以非常快速地更改PWM值,因此代码末尾的延迟控制淡入速度,尝试更改延迟的值,看看它如何改变fading效果。 ...
Arduino例程解读与实验（4.Fade 渐明渐暗）/ Fade//渐明渐暗 This example shows how to fade an LED on pin 9 using the analogWrite()function.//该例程展示如何使用analogWrite()函数实现与9脚连接的LED灯渐明渐暗变化。The analogWrite() function uses PWM, so if you want to change the...
原文地址 - https://www.arduino.cc/en/Tutorial/Blink 闪烁 这个例子展示了你能拿 Arduino / Genuino 板子来干的最简单的事:使开发板上的 LED 灯闪烁。 硬件需求 Arduino 开发板 LED (非必要) 220欧电阻(非必要) 电路 这
AnalogWrite函数使用PWM机制,用不同的高/低电平比例,非常快地打开和关闭一个数字引脚,以实现一个LED灯渐明渐暗的效果。 10.png 11.png /* Fade This example shows how to fade an LED on pin 9 using the analogWrite() function. The analogWrite() function uses PWM, so if you want to change the ...
int brightness = 0; //表示LED的亮度 int fadeAmount = 5; //LED亮度变化增量 void setup() { pinMode(11, OUTPUT); // 设置11号口为输出端口 } void loop() { analogWrite(11, brightness); //把brightness值写入端口 brightness = brightness + fadeAmount; //使亮度在下一次循环发生改变 ...
到了第32行，通过递增fadeAmount的值来增加亮度，这个值被设定为5。第35行引入了一个if语句 通过比较运算符来检查亮度值。如果亮度小于或等于零，或者大于或等于255，那么就会执行if语句内部的代码；否则，代码将跳过这一部分。因此，这个代码段会不断递增亮度，直到它达到或超过255。一旦达到这个阈值，代码会将fade...
This example shows how to fade an LED on pin 9 using the analogWrite() function. The analogWrite() function uses PWM, so if you want to change the pin you're using, be sure to use another PWM capable pin. On most Arduino, the PWM pins ...