Dimmer per strisce led con Arduino

Codice per la versione senza display:

/**************************************
 * Dimmer per strisce led             *
 *                                    * 
 * Esperienze Elettroniche 2021       *
 **************************************/

#define pwmPin 3
#define adcPin A0

int adcValue = 0;
int pwmValue = 0;

void setup() {
  analogWrite(pwmPin, 0);
}

void loop() {
  adcValue = analogRead(adcPin);

  pwmValue = map(adcValue, 0, 1024, 0, 255);

  analogWrite(pwmPin, pwmValue);

  delay(50);
}

Codice per la versione con display (occorre installare la libreria LiquidCrystal_I2C):

/**************************************
 * Dimmer per strisce led             *
 *                                    * 
 * Esperienze Elettroniche 2021       *
 **************************************/

#include <LiquidCrystal_I2C.h>

#define adcPin A0
#define pwmPin 3

// Change the address according with the device in use
LiquidCrystal_I2C lcd(0x3F, 16, 2);

// Custom haracters definition (rectangles used for progress bar)
uint8_t full[8] =
{
    0b11111,
    0b11111,
    0b11111,
    0b11111,
    0b11111,
    0b11111,
    0b11111,
    0b11111,
};

uint8_t empty[8] =
{
    0b11111,
    0b10001,
    0b10001,
    0b10001,
    0b10001,
    0b10001,
    0b10001,
    0b11111,
};

int adcValue = 0;
int pwmValue = 0;

void setup() {
  // Set mosfet control pin as output
  analogWrite(pwmPin, 0);

  // Initialize display
  lcd.backlight();
  lcd.init();
  
  lcd.print(" PWM Led Dimmer");

  // Create custom chars
  lcd.createChar(0, full);
  lcd.createChar(1, empty);
  
  delay(3000);
  
  lcd.clear();
  lcd.setCursor(3, 0);
  lcd.print("LUMINOSITA'");
}

void loop() {
  // Read analog value from potentiometer
  adcValue = analogRead(adcPin);

  // Truncate value to 8 bit
  pwmValue = map(adcValue, 0, 1023, 0, 255);

  // Set pwm output
  analogWrite(pwmPin, pwmValue);

  // Display pwm value
  printBar(pwmValue);

  delay(50);
}

void printBar(int value){
  int i=0, j=16;
  lcd.setCursor(0, 1);
  unsigned char b=(value+1)/16;
  while(b > i){
    lcd.write(0);
    i++;
    j--;
  }
  while(j > 0){
    lcd.write(1);
    j--;
  }
}