// read the input on analog pin 0: int sensorValue = analogRead(A0); // Convert the analog reading (which goes from 0 - 1023) to a voltage (0 - 5V): float voltage = sensorValue * (5.0 / 1023.0); // print out the value you read: Serial.println(voltage); } 代码功能 读取电位...
void loop() { // read the input on analog pin 0: int sensorValue =analogRead(A0); // Convert the analog reading (which goes from 0 - 1023) to a voltage (0 - 5V): float voltage = sensorValue * (5.0 / 1023.0); // print out the value you read: Serial.println(voltage); } 火...
模拟I/O 函数 Analog I/O Functions analogWrite(): 描述:在指定引脚输出指定占空比的 PWM 方波 函数原型:analogWrite(pin,value) 参数: pin:输出引脚 value:占空比,介于 0 - 255 之间 返回值:无 analogRead(): 描述:读取指定引脚的模拟信号值 函数原型:analogRead(pin) 参数: pin:要读取的模拟引脚的编...
This example shows you how to read analog input from the physical world using a potentiometer. Apotentiometeris a simple mechanical device that provides a varying amount of resistance when its shaft is turned. By passing voltage through a potentiometer and into an analog input on your board, it...
#include<Servo.h>Servo myservo;// create servo object to control a servoint potpin=0;// analog pin used to connect the potentiometerintval;// variable to read the value from the analog pinvoidsetup() { myservo.attach(9);// attaches the servo on pin 9 to the servo object}voidloop()...
It takes about 100 microseconds (0.0001 s) to read an analog input, so the maximum reading rate is about 10,000 times a second. 该函数100微秒(0.0001秒)读一次数,因此最大的读取速度是每秒10000次。
这时，我们可以在Arduino IDE里编入以下代码：void setup() { // initialize serial communication at 9600 bits per second:Serial.begin(9600);} // the loop routine runs over and over again forever:void loop() { // read the input on analog pin 0:float sensorValue = analogRead(A0);// convert...
6 pinMode(ledPin,OUTPUT); 7 } 8 void loop() 9 { 10 val=analogRead(analogPin); 11 analogWrite(ledPin,val/4); 12 } 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 必杀技: VS+Arduino+VMICRO插件实现Arduino编译和代码跟踪查看...
使用数字输入,可以将5V读取为“HIGH”,将0V读取为“LOW”。可以通过状态来判断开关是否已导通。但是,实际上电压不只是5V和0V,而是各种各样。例如,一节AA电池的电压为1.5V,日本家用插座的电压为100V。 Arduino支持模拟输入,以能够读取这些不同的电压。利用模拟输入功能,能够读取逐渐变化的电子元器件的状态。例如,使...
analog Read(PIN) 数值的读取: 引脚:从输入引脚(大部分板子从0到5, Mini和Nano从0到7, Mega从0到15) 读取数值 返回 从0到1023的整数值 注意事项: 如果模拟输入引脚没有连入电路, 由analog Read() 返回的值将根据多项因素(例如其他模拟输入引脚,你的手靠近板子等)产生波动。