Arduino 簡易訊號偵測，紅外線拼接

 void setup() {

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

  Serial.begin(9600);

  pinMode(5,INPUT);

}

void loop() {

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

  delay(100); //延遲毫秒

  if(digitalRead(5)==0) //0=LOW

  // If no signal print collision detected

  Serial.println("Balls");

  if(digitalRead(5)==1) //1=HIGH

  //else

  // 11 If signal detected print collision detected

  Serial.println("No Balls.");

}