const byte input_pin = 3;   // Pin 2 am ATtiny45 (PB3)
const byte output_pin = 4;  // Pin 7 am ATtiny45 (PB2)

bool last_state = HIGH;
unsigned long last_trigger_time = 0;
const unsigned long min_interval = 50; // Mikrosekunden

// Für Impulssteuerung
bool pulse_pending = false;
bool pulse_active = false;
unsigned long pulse_start_delay_time = 0;
unsigned long pulse_start_time = 0;

const unsigned long pulse_delay = 20;     // Mikrosekunden Verzögerung vor Impuls
const unsigned long pulse_duration = 20;  // Mikrosekunden Impulsdauer

void setup() {
  pinMode(input_pin, INPUT);
  pinMode(output_pin, OUTPUT);
  digitalWrite(output_pin, LOW);
}

void loop() {
  bool current_state = digitalRead(input_pin);
  unsigned long now = micros();

  // LOW → HIGH Übergang erkennen
  if (last_state == LOW && current_state == HIGH) {
    if (now - last_trigger_time > min_interval) {
      // Impuls vorbereiten mit Verzögerung
      pulse_pending = true;
      pulse_start_delay_time = now;
      last_trigger_time = now;
    }
  }

  // Impuls starten nach Verzögerung
  if (pulse_pending && (now - pulse_start_delay_time >= pulse_delay)) {
    digitalWrite(output_pin, HIGH);
    pulse_active = true;
    pulse_start_time = now;
    pulse_pending = false;
  }

  // Impuls beenden nach pulse_duration
  if (pulse_active && (now - pulse_start_time >= pulse_duration)) {
    digitalWrite(output_pin, LOW);
    pulse_active = false;
  }

  last_state = current_state;
}