格瑞图:Arduino-0006-内置示例-亮度调节 Fade 格瑞图:Arduino-0007-内置示例-读取模拟电压 Read Analog Voltage 1、示例代码及解析 (1)代码 /*Blink without DelayTurns on and off a light emitting diode (LED) connected to a digital pin,without using the delay() function. This means that other code ...
这行代码使 LED_BUILTIN 引脚回到 0V,使 LED 熄灭。在点亮与熄灭之间,你会希望有足够的时间间隔,使人肉眼能看出点亮和熄灭的变化,delay() 命令就是让开发板在 1000毫秒(1秒)时间内停下来什么都不做。当你使用 delay() 命令,在你指定的延时时间内什么都不会发生。当你明白各个基本例子后,可以查看 BlinkWitho...
delay(30); } } 2、亮度调节 - Fading This example demonstrates the use of analog output (Pulse Width Modulation (PWM)) to fade an LED. PWM is a technique for getting an analog-like behavior from a digital output by switching it off and on very fast and with different ratio between on ...
然后你关闭LED灯: digitalWrite(13, LOW); 那是把pin13短接到0V,从而关闭LED灯。在LED灯开和关之间,你想要足够的时间来让人看到这个变化,所以delay()命令告诉开发板1000毫秒内什么都不做。当你用delay()命令,在这段时间里没有其他的事情发生。如果你明白这个基本例子,查看BlinkWithoutDelay的例子来学习当在做其...
查看对应D5LED匹配IO13和蜂鸣器,源码修改如下,即可实现呼吸灯效果 1.1 源码分享 /*FadeThis example shows how to fade an LED on pin 9 using the analogWrite()function.The analogWrite() function uses PWM, so if you want to change the pin you'reusing, be sure to use another PWM capable pin. On...
Fade: Demonstrates the use of analog output to fade an LED. 褪色: 演示使用模拟输出褪色的LED。 2.Digital 2.Digital Blink Without Delay: blinking an LED without using the delay() function. 毫不拖延地闪烁:闪烁的LED不使用延 迟()函数。 Button: use a pushbutton to control an LED. 按钮:使用...
ezLED(int pin) ezLED(int pin, int mode) void turnON() void turnON(unsigned long delayTime) void turnOFF() void turnOFF(unsigned long delayTime) void toggle() void toggle(unsigned long delayTime) void fade(int fadeFrom, int fadeTo, unsigned long fadeTime) ...
5.1.4Fade 5.1.5ReadAnalogVoltage 5.2数字信号处理开发例程 5.2.1BlinkWithoutDelay 5.2.2Button 5.2.3Debounce 5.2.4DigitalInputPullup 5.2.5StateChangeDetection 5.2.6toneKeyboard 5.2.7toneMelody 5.2.8toneMultiple 5.2.9tonePitchFollower 5.3模拟信号处理开发例程 ...
Fade For “analogWrite()”, use PWM capable pin. PWM capable Pin 8, 9, 10, 11, 12, 13, 16, 17, 18, 20, 21, 23, and 24. ReadAnalogVoltage ADC pin used, up to 3.3V and can be calibrated by using analogSet(float gain, float offset). 02. Digital BlinkWithoutDelay LED_BUILTIN...
If you follow the ‘standard’ Arduino pin mapping and use SCLK for D13 then you’ll notice that this is where the built-in LED is normally connected Instead of the standard blink script you can easily fade the LED up and down in brightness. This is the test sketch I normally run ...