ch7_2可變電阻控制LED亮度,用Serialport回傳可變電阻及LED亮度數值
老蔡mytsaii教學網頁,hi 你好,我是老蔡mytsaii ch7_2可變電阻控制LED亮度,用Serialport回傳可變電阻及LED亮度數值 //ch7_ //轉VR2控制LED亮度 //LED接D3 //VR2接A2,要先將SW2-1 on。 //使用序列埠呈現VR值與LED值 //定義接腳 const int VR_pin=A2; const int LED_pin=3; int LED_value; void setup() { pinMode(LED_pin,OUTPUT); digitalWrite(LED_pin,0); Serial.begin(9600); } void loop() { int VR_value=analogRead(VR_pin); LED_value=map(VR_value,0,1023,0,255); analogWrite(LED_pin,LED_value); Serial.print("VR value is :"); Serial.println(VR_value); Serial.print("LED value is :"); Serial.println(LED_value); delay(1000); }