三彩渐变实验

「爱情、让人受尽委屈。」 2022-12-17 15:54 133阅读 0赞

# 三彩渐变实验 #

### 实验现象 ###

控制三基色LED中的红 绿 蓝三种颜色分别慢慢变量，在慢慢变暗

### 原理图 ###

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQ1NjcxNzMy_size_16_color_FFFFFF_t_70_pic_center]

### 代码编写 ###

#define led_r 3
    #define led_g 5
    #define led_b 6
    int pwmvalue;
    void setup() { 
      analogWrite(led_r, 255);
      analogWrite(led_g, 255);
      analogWrite(led_b, 255);
    }
    void red() { 
      pwmvalue = 255;
      for (int i = 0; i < 255; i++) { 
        analogWrite(led_r, pwmvalue--);
        analogWrite(led_g, 255);
        analogWrite(led_b, 255);
        delay(10);
      }
      pwmvalue = 0;
      for (int i = 0; i < 255; i++) { 
        analogWrite(led_r, pwmvalue++);
        analogWrite(led_g, 255);
        analogWrite(led_b, 255);
        delay(10);
      }
    }
    void green() { 
      pwmvalue = 255;
      for (int i = 0; i < 255; i++) { 
        analogWrite(led_r, 255);
        analogWrite(led_g, pwmvalue--);
        analogWrite(led_b, 255);
        delay(10);
      }
      pwmvalue = 0;
      for (int i = 0; i < 255; i++) { 
        analogWrite(led_r, 255);
        analogWrite(led_g, pwmvalue++);
        analogWrite(led_b, 255);
        delay(10);
      }
    }
    void blue() { 
      pwmvalue = 255;
      for (int i = 0; i < 255; i++) { 
        analogWrite(led_r, 255);
        analogWrite(led_g, 255);
        analogWrite(led_b, pwmvalue--);
        delay(10);
      }
      pwmvalue = 0;
      for (int i = 0; i < 255; i++) { 
        analogWrite(led_r, 255);
        analogWrite(led_g, 255);
        analogWrite(led_b, pwmvalue++);
        delay(10);
      }
    }
    void loop() { 
      red();
      green();
      blue();
    }

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