Keyestudio DS1302 Clock Module For Arduino Diy Starter Kit(Battery type is CR1220 )

The Keyestudio DS1302 Clock Module is a highly efficient real-time clock and calendar expansion board designed for Arduino DIY starter kits. It is perfect for students, educators, and makers who need to add precise timekeeping and power-off timing capabilities to their microcontroller projects. Equipped with a CR1220 backup battery, this module ensures your project keeps accurate track of time even when disconnected from its main power source.

Real-time calendar and clock tracking

The onboard DALLAS DS1302 chip automatically tracks seconds, minutes, hours, days, weeks, months, and years. It features automatic adjustments for leap years and months with fewer than 31 days, supporting both 12-hour and 24-hour formats.

Simple three-wire serial interface

This module communicates with your microcontroller using a synchronous serial interface that requires only three digital ports: RST reset, I/O data line, and SCLK serial clock. It supports reading and writing clock or RAM data in single-byte or burst transfers of up to 31 bytes.

Ultra-low power consumption

Operating with exceptional efficiency, the module consumes less than 1mW of power while maintaining data and clock information. This ensures minimal drain on your system's primary power supply during standard operation.

Long-term backup battery retention

The module includes a BS-1220 battery slot pre-fitted with a non-rechargeable 3V 40mAh CR1220 battery. This backup power source is capable of retaining your timekeeping data for more than one year in the absence of main power.

Compact design and easy mounting

Measuring 50 by 28mm and weighing just 5.8g, the board features a 3mm positioning hole for secure mounting onto your chassis. It connects easily via a 5-pin header interface with a standard 2.54mm pitch.