#include <FastLED.h> #define LED_PIN_1 3 #define LED_PIN_2 6 #define LED_COUNT_1 53 #define LED_COUNT_2 7 #define BRIGHTNESS 255 #define LED_TYPE WS2812B #define COLOR_ORDER GRB CRGB leds_1[LED_COUNT_1]; CRGB leds_2[LED_COUNT_2]; int pin_switch = 10; // 定义数字输入口pin10接收开关状态 int switch_state = 0; // 定义开关状态变量 void setup() { FastLED.addLeds<LED_TYPE, LED_PIN_1, COLOR_ORDER>(leds_1, LED_COUNT_1); FastLED.addLeds<LED_TYPE, LED_PIN_2, COLOR_ORDER>(leds_2, LED_COUNT_2); FastLED.setBrightness(BRIGHTNESS); Serial.begin(9600);//设置串口波特率为9600kbps pinMode(pin_switch, INPUT); // 初始化数字输入口 } void loop() { switch_state = digitalRead(pin_switch); // 读取开关状态 if (switch_state == LOW) { // 开关按下 } else { // 开关未按下，灯带状态为白色呼吸灯 bool breathing = true; // 定义一个变量用于记录呼吸灯状态 while (breathing) { // 当呼吸灯状态为true时，执行循环 int brightness = 0; for (int i = 0; i < 7680; i++) { brightness = (exp(sin(i / 50.0 * PI)) - 0.36787944) * 108.0; for (int j = 0; j < LED_COUNT_1; j++) { leds_1[j].setRGB(brightness, brightness, brightness); } FastLED.show(); delay(10); switch_state = digitalRead(pin_switch); if (switch_state == LOW) { // 如果开关被按下，退出循环 breathing = false; break; } } } } }开关按下时，从第一个灯珠向最后一个灯珠亮绿色，最后一个灯珠绿色保留，然后第一个灯珠再向倒数第二个灯珠亮绿色，倒数第二个灯珠也保留，以此类推直到灯珠全部点亮

这是Arduino的代码示例，用于控制LED灯带的亮灭效果。代码中定义了两个LED灯带，分别连接在引脚3和引脚6上，使用了FastLED库来控制LED的亮灭，并设置了亮度、颜色顺序等参数。在循环中，通过数字输入口读取开关状态，如果开关未按下，则执行呼吸灯效果，即从第一个灯珠开始向最后一个灯珠逐个点亮，并在点亮后保留绿色，直到所有灯珠都点亮。如果开关被按下，则退出循环，灯光停止。

相关问题

#include <FastLED.h> #define LED_PIN_1 3 #define LED_PIN_2 6 #define LED_COUNT_1 53 #define LED_COUNT_2 7 #define BRIGHTNESS 255 #define LED_TYPE WS2812B #define COLOR_ORDER GRB CRGB leds_1[LED_COUNT_1]; CRGB leds_2[LED_COUNT_2]; void setup() { FastLED.addLeds<LED_TYPE, LED_PIN_1, COLOR_ORDER>(leds_1, LED_COUNT_1); FastLED.addLeds<LED_TYPE, LED_PIN_2, COLOR_ORDER>(leds_2, LED_COUNT_2); FastLED.setBrightness(BRIGHTNESS); } void loop() { int brightness_2 = 0; int fadeAmount = 5; for (int i = 0; i < 7680; i++) { int brightness_1 = (exp(sin(i / 50.0 * PI)) - 0.36787944) * 108.0; for (int j = 0; j < LED_COUNT_1; j++) { leds_1[j].setRGB(0, brightness_1, 0); } FastLED.show(); delay(20); } }在呼吸灯之后增加一个效果，增加一个流水灯的效果

以下是增加流水灯效果的代码：

#include <FastLED.h> 
#define LED_PIN_1 3 
#define LED_PIN_2 6 
#define LED_COUNT_1 53 
#define LED_COUNT_2 7 
#define BRIGHTNESS 255 
#define LED_TYPE WS2812B 
#define COLOR_ORDER GRB 

CRGB leds_1[LED_COUNT_1]; 
CRGB leds_2[LED_COUNT_2]; 

void setup() { 
  FastLED.addLeds<LED_TYPE, LED_PIN_1, COLOR_ORDER>(leds_1, LED_COUNT_1); 
  FastLED.addLeds<LED_TYPE, LED_PIN_2, COLOR_ORDER>(leds_2, LED_COUNT_2); 
  FastLED.setBrightness(BRIGHTNESS); 
} 

void loop() { 
  int brightness_2 = 0; 
  int fadeAmount = 5; 
  for (int i = 0; i < 7680; i++) { 
    int brightness_1 = (exp(sin(i / 50.0 * PI)) - 0.36787944) * 108.0; 
    for (int j = 0; j < LED_COUNT_1; j++) { 
      leds_1[j].setRGB(0, brightness_1, 0); 
    } 

    // 流水灯效果
    for (int j = 0; j < LED_COUNT_2; j++) { 
      leds_2[j] = CRGB::Black; // 先将所有LED设置为黑色
      leds_2[((i/20)+j)%LED_COUNT_2] = CRGB::Red; // 设置流水灯的红色
    } 

    FastLED.show(); 
    delay(20); 
  } 
}

在此代码中，增加了一个for循环来控制流水灯效果。在每个循环中，使用for循环来逐个设置LED的颜色。在每个流水灯的位置设置红色，其他LED设置为黑色。使用模运算和延迟来控制流水灯的速度和效果。

#include <FastLED.h> #define LED_PIN_1 3 #define LED_PIN_2 6 #define LED_COUNT_1 42 #define LED_COUNT_2 7 #define BRIGHTNESS 255 #define LED_TYPE WS2812B #define COLOR_ORDER GRB CRGB leds_1[LED_COUNT_1]; CRGB leds_2[LED_COUNT_2]; void setup() { FastLED.addLeds<LED_TYPE, LED_PIN_1, COLOR_ORDER>(leds_1, LED_COUNT_1); FastLED.addLeds<LED_TYPE, LED_PIN_2, COLOR_ORDER>(leds_2, LED_COUNT_2); FastLED.setBrightness(BRIGHTNESS); } void loop() { int brightness_2 = 0; int fadeAmount = 5; for (int i = 0; i < 7680; i++) { int brightness_1 = (exp(sin(i / 50.0 * PI)) - 0.36787944) * 108.0; for (int j = 0; j < LED_COUNT_1; j++) { leds_1[j].setRGB(brightness_1, brightness_1, brightness_1); } FastLED.show(); delay(20); } }让第二个LED灯带在第一个LED灯带呼吸的状态下同时慢慢亮起

可以尝试在循环中添加对第二个LED灯带的控制，使其跟随第一个灯带的呼吸状态，并且慢慢亮起。具体代码如下：

#include <FastLED.h> 

#define LED_PIN_1     3 
#define LED_PIN_2     6 
#define LED_COUNT_1   42 
#define LED_COUNT_2   7 
#define BRIGHTNESS  255 
#define LED_TYPE    WS2812B 
#define COLOR_ORDER GRB 

CRGB leds_1[LED_COUNT_1]; 
CRGB leds_2[LED_COUNT_2]; 

void setup() { 
  FastLED.addLeds<LED_TYPE, LED_PIN_1, COLOR_ORDER>(leds_1, LED_COUNT_1); 
  FastLED.addLeds<LED_TYPE, LED_PIN_2, COLOR_ORDER>(leds_2, LED_COUNT_2); 
  FastLED.setBrightness(BRIGHTNESS); 
} 

void loop() { 
  int brightness_2 = 0; 
  int fadeAmount = 5; 

  for (int i = 0; i < 7680; i++) { 
    int brightness_1 = (exp(sin(i / 50.0 * PI)) - 0.36787944) * 108.0; 

    for (int j = 0; j < LED_COUNT_1; j++) { 
      leds_1[j].setRGB(brightness_1, brightness_1, brightness_1); 
    } 

    // 将第二个灯带的亮度设为第一个灯带的亮度
    for (int k = 0; k < LED_COUNT_2; k++) { 
      leds_2[k].setRGB(brightness_1, brightness_1, brightness_1); 
    } 

    // 逐渐增加第二个灯带的亮度
    if (brightness_2 < brightness_1) { 
      brightness_2 += fadeAmount; 
      if (brightness_2 > brightness_1) { 
        brightness_2 = brightness_1; 
      } 
      for (int k = 0; k < LED_COUNT_2; k++) { 
        leds_2[k].setRGB(brightness_2, brightness_2, brightness_2); 
      } 
    } 

    FastLED.show(); 
    delay(20); 
  } 
}

需要注意的是，这段代码中的呼吸效果是由第一个灯带控制的，第二个灯带只是跟随变化，如果需要更改呼吸效果，需要修改对第一个灯带的控制。