Curious-Soul / Interrupt-Arduino-Using-DS3231-RTC Public Notifications Fork 0 Star 0 ...

Limitations The library is using CMP mode of the RTC timer to dive individual timers. Since RTC domain clock is asynchronous to the main clock, it takes up to 3 RTC lcock cycles to syncronize CMP ...

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 ...