33 lines
726 B
C++
Executable File
33 lines
726 B
C++
Executable File
/*
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27 模拟输出3 - for
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太极创客
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www.taichi-maker.com
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此程序用于太极创客<<零基础入门学用Arduino教程>>
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27 模拟输出3 - for
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演示如何通过for循环语句实现LED明暗交替（呼吸灯）效果。
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2017-04-28
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*/
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void setup() {
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pinMode(9, OUTPUT); //设置9号引脚为输出模式
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Serial.begin(9600); //启动串口通讯
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}
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void loop() {
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// LED由暗到明
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for (int brightness = 0; brightness <= 255; brightness++){
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analogWrite(9, brightness);
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Serial.println(brightness);
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delay(10);
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}
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// LED由明到暗
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for (int brightness = 255; brightness >=0 ; brightness--){
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analogWrite(9, brightness);
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Serial.println(brightness);
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delay(10);
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}
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}
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