Arduino Alarm Clock

How to Make an Arduino Alarm Clock Using a Real-Time Clock and LCD Screen | Arduino

Arduino and DS3231 Real Time Clock Tutorial

Getting Started with DS3231 RTC Module - Interface DS3231 Module with Arduino Uno

Interfacing RTC module (DS3231) with MSP430: Digital Clock

Real Time Clock : Arduino UNO DS3231 Rtc Module LCD 20x4 I2C