int sw1 = 12; int led1 = 10; int sw2 = 5; int led2 = 3; void setup() { pinMode(led1, OUTPUT); pinMode(led2, OUTPUT); pinMode(sw1, INPUT_PULLUP); pinMode(sw2, INPUT_PULLUP); //sw를 인풋_풀업으로 하여 스위치가 열려있다면 HIGH //스위치가 닫혀있다면 LOW값을 반환 } void loop() { if(digitalRead(sw1) == LOW) //스위치가 눌리면 digitalWrite(led1, HIGH); //led On else digitalWrite(led1, LOW); //스위치가 닫히면 Off if(digitalRead(sw2) == LOW) digitalWrite(led2, HIGH); else digitalWrite(led2, LOW); }