DS3234 RTC Real Time Clock Module for Arduino and Raspbeery
This is a digital RTC - Real Time Clock made specifically to be used with the Arduino, Raspberry Pi and all other general-purpose microcontrollers which support the SPI interface. The RTC can be used to store and retrieve the current time. Once saved the RTC will use its inbuilt battery to keep time even when the Arduino or the external microcontroller is powered off. The module can keep time for long periods upto 2 years(depending on the battery you use).
Here is a real time clock based on the DS3234 Real Time Clock IC. The DS3234 is a low-cost, extremely accurate SPI bus real-time clock with an integrated temperature-compensated crystal oscillator and crystal.
The RTC maintains seconds, minutes, hours, day, date, month, and year information. The date at the end of the month is automatically adjusted for months with fewer than 31 days, including corrections of leap year. The clock operates in either the 24-hour or 12-hour format with AM/PM indicator. Two programmable time-of-day alarms and a programmable square-wave output are provided.
The underside of the board holds a 12mm coin-cell battery holder for battery backup.
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