KitsGuru DS1302 RTC Real Time Clock module without CR2032 Battery (Set of 2) Electronic Components Electronic Hobby Kit

The DS1302 trickle-charge timekeeping chip contains a real-time clock/calendar and 31 bytes of static RAM. It communicates with a microprocessor via a simple serial interface. The real-time clock/calendar provides seconds, minutes, hours, day, date, month, and year information. Only three wires are required to communicate with the clock/RAM: CE, I/O (data line), and SCLK (serial clock). Data can be transferred to and from the clock/RAM 1 byte at a time or in a burst of up to 31 bytes.1. Real-Time Clock Counts Seconds, Minutes, Hours, Date of the Month, Month, Day of the Week, and Year with Leap-Year Compensation Valid Up to 21002. Single-Byte or Multiple-Byte (Burst Mode) Data Transfer for Read or Write of Clock or RAM DataThe DS1302 is designed to operate on very low power and retain data and clock information on less than 1μW. The DS1302 has dual power pins, one for primary and another for backup. in this example the Priamry power will be provided by the Arduino, and the back up by a CR2032 battery.1. 2.0V to 5.5V Full Operation2. Serial I/O for Minimum Pin Count3. Uses Less than 300nA at 2.0V4. Board Size: 44mm x 24mm