The most popular RTC for the Arduino is the DS1307. However, it does have some drawbacks, the most notable of which is that its operating voltage is 5v, which means it cannot be used with 3.3v ...

A customizable smart alarm clock built using Arduino. This project features a real-time clock (RTC) module, an LCD display, and buttons to set and manage alarms. Ideal for learning embedded systems ...

Desk Clock with Temperature and Humidity Display A versatile Arduino-based desk clock project that displays time, date, temperature, and humidity using a 16x2 LCD display, DHT11 sensor, and DS3231 RTC ...