哎，別笑，總比刷抖音強點吧

1、效果

2、代碼

const int buttonPin=2;
const int ledPin=13;int buttonState=0;void setup() {// put your setup code here, to run once:pinMode(buttonPin,INPUT);pinMode(ledPin,OUTPUT);
}void loop() {// put your main code here, to run repeatedly:buttonState=digitalRead(buttonPin);if(buttonState==HIGH){digitalWrite(ledPin,HIGH);}else{digitalWrite(ledPin,LOW);}
}

3、效果

4、代碼

const int buttonPin=2;
const int ledPin=13;int buttonState=0;
int ledState=0;void setup() {// put your setup code here, to run once:pinMode(buttonPin,INPUT);pinMode(ledPin,OUTPUT);
}void loop() {// put your main code here, to run repeatedly:while(digitalRead(buttonPin)==LOW){}if(ledState==0){digitalWrite(ledPin,HIGH);ledState=1;}else{digitalWrite(ledPin,LOW);ledState=0;}delay(500);
}

5、總結

1、重新復習了下拉電阻的概念。
2、while(digitalRead(buttonPin)==LOW){}這句代碼，Arduino系統內部是有中斷器的，可以監聽外部的輸入