消除彈跳debounceDelay

 int led = 10;

int sw1 = 3;

int value=0;

int ledState=LOW;

int debounceDelay=20;

void setup()

{

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

  pinMode(led,OUTPUT);

  pinMode(sw1,INPUT_PULLUP);

}

void loop() {

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

value=digitalRead(sw1);

if(value==0)

{

  delay(debounceDelay);

  while(digitalRead(sw1)==LOW)

   ;

  ledState=!ledState;

  digitalWrite(led,ledState);

}

}