// MCU BASIC: https://www.basic4mcu.com
// DateTime : 2018-04-25 오후 11:35:21
// by Ok-Hyun Park
아두이노에 택트 스위치를 달아서 모터를 구동하려고 합니다
한번만 눌럿을 때 모터를 2초간 50이라는 속도로 돌리고 
떼었을 때에는 멈추도록 했습니다
근데 계속 누르고 있으면 누르고 있는 만큼 모터가 돌아갑니다
여기서 계속 누르고 있어도 한번만 돌릴수 있도록 하는 방법이 뭐가 있을까요 ..?
결론은 누르고 있을때 값이 한번만 찍을수 있게요
//
int button=6;
int var=0;
//
void setup(){
  Serial.begin(9600);
  pinMode(2,OUTPUT);
  pinMode(6,INPUT_PULLUP);
}
//
void loop(){
  int btnClick=digitalRead(button); Serial.println(btnClick);
  //
  if(btnClick==0){ //눌럿을 때
    if(var==0){ var=1; Serial.println("asd"); analogWrite(3,50); delay(2000); analogWrite(3,0); }
  }
  else{ //if(btnClick==1) //떼었을 때
    if(var==1){ var=0; Serial.println("bbb"); }
  }
  //
  delay(100);
}