紅外線遮住是常開或長閉無所謂.接線不是COM-NO 就是 COM-NC..
太晚了.有空我再試試fpe大的方法..

以下是我重複測試最後版..

void setup() {

pinMode(2, INPUT_PULLUP);
pinMode(3, OUTPUT);digitalWrite(3, LOW);
pinMode(4, OUTPUT);digitalWrite(4, LOW);
}

void loop() {

while(true){
if(!digitalRead(2)){

digitalWrite(3, HIGH);digitalWrite(4, LOW);
delay(1000);
digitalWrite(3, LOW);digitalWrite(4, LOW);
delay(1000);
digitalWrite(3, LOW);digitalWrite(4, HIGH);
delay(1000);
digitalWrite(3, LOW);digitalWrite(4, LOW);
delay(5000);
digitalWrite(3, HIGH);digitalWrite(4, LOW); //紅外線一直遮住5秒後.持續停止以防下降

while(!digitalRead(2)){};

if (digitalRead(2 != HIGH) ){
digitalWrite(3, LOW);digitalWrite(4, LOW);}
delay(200);}}}

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