Arduino 模拟信号的读入并转化为0-5V电压

int ledIn = A0;  
  
void setup(){  
  Serial.begin(9600);  
}  
  
void loop(){  
  int sensorValue = 易做图ogRead(ledIn);  
  // 将模拟信号转化为0-5V的电压  
  float voltage = sensorValue * (5.0 / 1023.0);  
  // 打印电压  
  if(voltage>1) Serial.println(voltage);  
}