#include <LiquidCrystal.h>
// RS, E, D4, D5, D6, D7
LiquidCrystal lcd(12, 11, 5, 4, 3, 2);
unsigned long previousMillis = 0;
const unsigned long interval = 1000;
int seconds = 0;
int minutes = 0;
int hours = 0;
void setup() {
lcd.begin(16, 2);
lcd.print("Digital Clock: ");
}
void loop() {
unsigned long currentMillis = millis();
if (currentMillis - previousMillis >= interval) {
previousMillis = currentMillis;
seconds++;
if (seconds >= 60) {
seconds = 0;
minutes++;
}
if (minutes >= 60) {
minutes = 0;
hours++;
}
if (hours >= 24) {
hours = 0;
}
updateDisplay();
}
}
void updateDisplay() {
lcd.setCursor(0, 1);
if (hours < 10) lcd.print("0");
lcd.print(hours);
lcd.print(":");
if (minutes < 10) lcd.print("0");
lcd.print(minutes);
lcd.print(":");
if (seconds < 10) lcd.print("0");
lcd.print(seconds);
}