LaserControl.ino

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## 📄 Code (`LaserControl.ino`)

```cpp
// LaserControl.ino
// Author: bocaletto-luca
// MIT License — 2025
//
// 12 V Laser PWM controller with toggle switch and potentiometer.

const int laserPin = 9;    // PWM output to MOSFET gate
const int potPin   = A0;   // Power adjust
const int btnPin   = 2;    // Toggle ON/OFF

bool laserOn       = false;
int  lastBtnState  = HIGH;
unsigned long lastDebounce = 0;
const unsigned long debounceDelay = 50;

void setup() {
  pinMode(laserPin, OUTPUT);
  pinMode(btnPin, INPUT_PULLUP);
  Serial.begin(9600);
  Serial.println("🔴 LaserControl ready.");
}

void loop() {
  // 1) Debounce and toggle laserOn
  int reading = digitalRead(btnPin);
  if (reading != lastBtnState) {
    lastDebounce = millis();
  }
  if ((millis() - lastDebounce) > debounceDelay) {
    if (reading == LOW && lastBtnState == HIGH) {
      laserOn = !laserOn;
      Serial.print("Laser ");
      Serial.println(laserOn ? "ON" : "OFF");
    }
  }
  lastBtnState = reading;

  // 2) Read potentiometer and set PWM if laser is ON
  if (laserOn) {
    int potVal = analogRead(potPin);
    int pwmVal = map(potVal, 0, 1023, 0, 255);
    analogWrite(laserPin, pwmVal);
  } else {
    analogWrite(laserPin, 0);
  }

  delay(10);
}