我是基于arduino UNO R3套件来实现的RGB三色灯案例。在这整套的套件中,备有RGB三色灯集成器件。
关于RGB三色灯的电路原理,各位直接在网上就可以搜索到,这里就不过多赘述。接下来就是关于RGB三色灯的实例。
RGB三色灯——流水灯效果:
#define RED 12
#define GREEN 8
#define BLUE 7
void red(void);
void green(void);
void blue(void);
void setup() {
// put your setup code here, to run once:
pinMode(RED, OUTPUT);
pinMode(GREEN, OUTPUT);
pinMode(BLUE, OUTPUT);
digitalWrite(RED, LOW);
digitalWrite(RED, LOW);
digitalWrite(RED, LOW);
}
void loop() {
// put your main code here, to run repeatedly:
red();
delay(1000);
green();
delay(1000);
blue();
delay(1000);
}
void red(void)
{
digitalWrite(RED, HIGH);
digitalWrite(GREEN, LOW);
digitalWrite(BLUE, LOW);
}
void green(void)
{
digitalWrite(RED, LOW);
digitalWrite(GREEN, HIGH);
digitalWrite(BLUE, LOW);
}
void blue(void)
{
digitalWrite(RED, LOW);
digitalWrite(GREEN, LOW);
digitalWrite(BLUE, HIGH);
}
RGB三色灯——呼吸灯效果:
#define LED_red 11
#define LED_green 10
#define LED_blue 9
void breath(int pin);
void setup() {
// put your setup code here, to run once:
pinMode(LED_red, OUTPUT);
pinMode(LED_green, OUTPUT);
pinMode(LED_blue, OUTPUT);
}
void loop() {
// put your main code here, to run repeatedly:
breath(LED_red);
breath(LED_green);
breath(LED_blue);
}
void breath(int pin)
{
for(int i = 0; i <= 255; i++)
{
analogWrite(pin, i);
delay(5);
}
for(int i = 255; i >= 0; i--)
{
analogWrite(pin, i);
delay(5);
}
delay(100);
}
这里要提醒一下各位:在Arduino UNO板上,有pwm输出口,需要各位注意看,并且在这里我是用到了analogWrite(int pin, int value)函数,是arduino函数库中专门用来pwm调试输出的。