格瑞图:Arduino-0017-内置示例-模拟输入串口输出 AnalogInOutSerial 1、示例代码及解析 (1)代码 /*Analog InputDemonstrates analog input by reading an analog sensor on analog pin 0 andturning on and off a light emittingdiode(LED) connected to digital pin 13.The amount of time the LED will be on...
{//将连接LED的引脚设置为输出模式pinMode(ledPin, OUTPUT); }voidloop() {//读取引脚A0的输入信号,并将该数值赋给变量valval =analogRead(A0);//将引脚A0读取的数值转换为0-255之间//并将该数值写入引脚3analogWrite(ledPin, val /4); } 04 将模拟输入值 映射 为模拟输出值 map(analog,0,1023,0,255...
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...
int uvLevel = averageAnalogRead(ReadUVintensityPin); float outputVoltage = 5.0 * uvLevel/1024; float uvIntensity = mapfloat(outputVoltage, 0.99, 2.9, 0.0, 15.0); Serial.print("UVAnalogOutput: "); Serial.print(uvLevel); Serial.print(" OutputVoltage: "); Serial.print(outputVoltage); Serial...
模拟输出 Analog output analogWrite(pin, value) 在已有的引脚上使能软件PWM功能。PWM可以用在引脚0~16。调用analogWrite(pin, 0) 可以关闭引脚PWM。取值范围:0~ PWMRANGE,默认为1023。 PWM 范围可以使用analogWriteRange(new_range)语句来更改。 PWM 默认频率:1KHz。使用analogWriteFreq(new_frequency) 可以更改频率...
int analogPin = 3; // potentiometer connected to analog pin 3 int val = 0; // variable to store the read value void setup() { pinMode(ledPin, OUTPUT); // sets the pin as output } void loop() { val = analogRead(analogPin); // read the input pin ...
pinMode(ledPin, OUTPUT);} void loop(){ //读取引脚A0的输⼊信号，并将该数值赋给变量val val = analogRead(A0);// 将引脚A0读取的数值转换为0-255之间 // 并将该数值写⼊引脚3 analogWrite(ledPin, val / 4);} 04 将模拟输⼊值映射为模拟输出值 map(analog,0,1023,0,255) 其实也就...
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 (...
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 month, we will first learn how to use the Arduino serial library and the serial monitor to communicate between the Arduino and a PC - something we'll need for setting values for analog output. After that, we will discuss the differences between analog and digital, then learn to output...