* Using rtc.lostPower() with DS1307 might not work correctly because it doesn't have the lostPower feature. * Using !rtc.isrunning() with DS3231 might not effectively check for power loss, and you may ...

Designing a Real-Time Clock (RTC) using an Arduino is a useful project for timekeeping and timestamping in various applications. You can use a dedicated RTC module like the DS3231 or DS1307, which ...

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 ...