43 lines
1.7 KiB
C++
Executable File
43 lines
1.7 KiB
C++
Executable File
/*
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电位器模拟输出
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读取模拟输入引脚，并将读取到的数值映射到0 - 255之间。然后用该映射结果设置
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引脚9的LED亮度，同时通过串口监视器显示这一映射结果。
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电路连接:
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电位器中间引脚连接到模拟输入A0引脚
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电位器两端引脚分别连接在Arduino +5V和接地引脚
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* LED正极通过 限流电阻连接在Arduino的9号引脚
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LED负极接地
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太极创客
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2017-01-08
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<blockquote data-secret="W1T9d0SaZ7" class="wp-embedded-content"><a href="http://www.taichi-maker.com/">欢迎来到太极创客网站!</a></blockquote><iframe class="wp-embedded-content" sandbox="allow-scripts" security="restricted" style="position: absolute; clip: rect(1px, 1px, 1px, 1px);" src="http://www.taichi-maker.com/embed/#?secret=W1T9d0SaZ7" data-secret="W1T9d0SaZ7" width="600" height="338" title="《欢迎来到太极创客网站!》—太极创客" frameborder="0" marginwidth="0" marginheight="0" scrolling="no"></iframe>
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This example code is in the public domain.
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*/
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void setup() {
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Serial.begin(9600); // 串口通讯初始化(9600 bps)
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pinMode(9, OUTPUT); // 设置9号引脚为输出模式
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}
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void loop() {
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int analogInputVal = analogRead(A0); // 读取模拟输入值
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int brightness = map(analogInputVal, 0, 1023, 0, 255); //将模拟输入数值（0 - 1023）等比映射到模拟输出数值区间（0-255）内
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analogWrite(9, brightness); //根据模拟输入值调节LED亮度
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// 将结果通过串口监视器显示:
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Serial.print("analogInputVal = ");
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Serial.println(analogInputVal);
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Serial.print("brightness = ");
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Serial.println(brightness);
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Serial.println("");
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}
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