button_entprellen_software_arduino.ino

const int button = 12;    // Button Pin
const int led = 13;      // LED Pin


int led_status = HIGH;         
int button_status;             
int vorheriger_button_status = LOW;   

long letztes_prellen = 0;  
long entprellzeit = 60;    

void setup() {
  pinMode(button, INPUT);
  pinMode(led, OUTPUT);

  digitalWrite(led, led_status);
}

void loop() {
  int aktueller_status = digitalRead(button);

  if (aktueller_status != vorheriger_button_status) {
    letztes_prellen = millis();
  } 
  
  if ((millis() - letztes_prellen) > entprellzeit) {
    if (aktueller_status != button_status) {
      button_status = aktueller_status;

      if (button_status == LOW) {
        led_status = !led_status;
      }
    }
  }

  digitalWrite(led, led_status);

  vorheriger_button_status = aktueller_status;
}