AR02 Switch

・Use Pull-up

Normally, When you use switch, you have to connect resister.
But to use Pull-up fanction in Arduino, you can use switch without rester.

Circuit

Conect Digital pin

Code

#define SW1 0
#define SW2 1

#define LED1 2
#define LED2 3

void setup() {
  pinMode(SW1, INPUT_PULLUP);
  pinMode(SW2, INPUT_PULLUP);
  pinMode(LED1, OUTPUT);
  pinMode(LED2, OUTPUT);
}

void loop() {
  while(digitalRead(SW1) == LOW){
  	digitalWrite(LED1, HIGH);
    delay(500);
    digitalWrite(LED1, LOW);
  }
    
  while(digitalRead(SW2) == LOW){
    digitalWrite(LED2, HIGH);
    delay(500);
    digitalWrite(LED2, LOW);
  }
}elay(1000);

}