LED Clock Arduino ⏰✨

A modular, feature-rich LED clock with alarms, menu navigation, and startup animations – all running on an Arduino!

Features

• Real-time clock (DS3231)
• LED or 7-segment display (MAX7219/TM1637)
• Alarm with EEPROM storage
• Button-based settings menu
• 12/24h support and animated startup

---

Wiring Diagram

RTC Module (DS3231)

RTC Pin	Arduino Pin
SDA	A4 (Uno)
SCL	A5 (Uno)
VCC	5V
GND	GND

Buttons

Button	Arduino Pin
Mode Button	2
Up Button	3
Down Button	4

Display (MAX7219 or TM1637)

Refer to your display's documentation; connect via SPI or DIO/CLK as required.

Optional Buzzer

Buzzer Lead	Arduino Pin
+	13
-	GND

---