This example shows you how to read an analog input pin, map the result to a range from 0 to 255, use that result to set thepulse width modulation(PWM) of an output pin to dim or brighten an LED and print the values on the serial monitor of the Arduino Software (IDE). 该例展示了...
const int analogInPin = A0; // Analog input pin that the potentiometer is attached to const int analogOutPin = 9; // Analog output pin that the LED is attached to int sensorValue = 0; // value read from the pot int outputValue = 0; // value output to the PWM (analog out) void...
The analogWrite function has nothing whatsoever to do with the analog pins or the analogRead function.这个analogWrite⽅法与模拟引脚或者analogRead⽅法毫不相⼲ Syntax 语法 analogWrite(pin, value)Parameters 参数 pin: the pin to write to.pin：输出的引脚号 value: the duty cycle: between 0 (...
The parameters of the function of the function include:The minimum input (in this example is 0)，The input maximum value (in this example 1023)，The minimum output (in this example 0)，The output maximum value (in this example is 100).最后，我们使用`Serial.print()`函数将转换后的值打印到...
① 模拟输入引脚是带有ADC(Analog-to-Digital Converter,模数转换器)功能的引脚。 ②它可以将外部输入的模拟信号转换为芯片运算时可以识别的数字信号,从而实现读入模拟值的功能。 ③模拟输入功能需要使用analogRead() 函数。 参数:参数pin是指定要读取模拟值的引脚,被指定的引脚必须是模拟输入引脚。如analogRead(A0),即...
This 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're using, be sure to use another PWM capable pin. On most Arduino, the PWM pins ...
int UVOUT = A0; //Output from the sensor int REF_3V3 = A1; //3.3V power on the Arduino board void setup(){ Serial.begin(9600); pinMode(UVOUT, INPUT); pinMode(REF_3V3, INPUT); Serial.println("MP8511 example"); } void loop(){ ...
Example 例子 Sets the output to the LED proportional to the value read from the potentiometer. int ledPin = 9; // LED connected to digital pin 9 int analogPin = 3; // potentiometer connected to analog pin 3 int val = 0; // variable to store the read value ...
Demonstrates the use of analog output to fade an LED. 演示怎样使用模拟输出调整 LED 亮度。 This example demonstrates the use of theanalogWrite()function in fading an LED off and on. AnalogWrite usespulse width modulation (PWM), turning a digital pin on and off very quickly with different ratio...
depends on an analog input.取决于模拟输入。 The circuit:电路: * LEDs from pins 2 through 11 to ground*从引脚2到11的LED地面 created 4 Sep 2010创建2010年9月4日 by Tom Igoe汤姆Igoe This example code is in the public domain.这个例子的代码是在公共领域。 http://www.doczj.com/doc/85639c31...