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int a = digitalRead(output);
b= !a;
digitalWrite (output,b);

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بله میتونید همین کد رو استفاده کنید.
کد:
/*
  Blink
  Turns on an LED on for one second, then off for one second, repeatedly.


  Most Arduinos have an on-board LED you can control. On the Uno and
  Leonardo, it is attached to digital pin 13. If you're unsure what
  pin the on-board LED is connected to on your Arduino model, check
  the documentation at http://www.arduino.cc


  This example code is in the public domain.


  modified 8 May 2014
  by Scott Fitzgerald
*/




// the setup function runs once when you press reset or power the board
void setup() {
  // initialize digital pin 13 as an output.
  pinMode(13, OUTPUT);
}


// the loop function runs over and over again forever
void loop() {
  int a = 0;
  digitalWrite (13, a);
  delay(1000);              // wait for a second
  int b = !a;
  digitalWrite(13, b);    // turn the LED off by making the voltage LOW
  delay(1000);              // wait for a second
}