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