哎，别笑，总比刷抖音强点吧

1、效果

2、代码

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、代码

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、总结

1、重新复习了下拉电阻的概念。
2、while(digitalRead(buttonPin)==LOW){}这句代码，Arduino系统内部是有中断器的，可以监听外部的输入