Library: DS3231 This library has been made to easily interface and use the DS3231 RTC with an Arduino or chipKit. The library will also work with the DS3232 RTC chip but you will not be able to use the internal SRAM. The DS3231 is a low-cost, extremely accurate I2C realtime clock (RTC) with an in
Library: DS1307 This library was made because I wanted an easy way to interface and use the DS1307 I²C Real-Time Clock without the need for the Wire library. The DS1307 serial real-time clock (RTC) is a low-power, full binary-coded decimal (BCD) clock/calendar plus 56 bytes of NV SRAM. Address a