類比訊號輸入練習

 跟隨佑來認真教練習類比訊號輸入

影片

程式碼

int sensor = A0;

int sensorRead = 0;

int newdata = 0;

int bright = 0;//亮度值

int printout = 0;//印出條件

void setup() {

  // put your setup code here, to run once:

  Serial.begin(9600); //設定傳輸位元

}

void loop() {

  // put your main code here, to run repeatedly:

   sensorRead = analogRead(sensor);//類比訊號源 亦可直接打A3:

   newdata = map(sensorRead, 0, 1023, 0,500);//設定newdata 的數據由0~1023轉成0~500:

  

   bright = map(newdata ,0 ,500 ,0 ,255);//設定亮度輸出值由0~500轉成0~255:

   analogWrite(3 ,bright);//設定類比輸出到A3與輸出數值:

   if (printout !=newdata ){ //設定電壓有變才印出數值:

   Serial.print("V=");

   Serial.print(newdata);

   Serial.print(";L=");

   Serial.println(bright);

   delay(500);//設定電壓有變時取樣間隔時間:

}

   printout = newdata;

   delay(20);

}