Features

• DS1302 RTC Real-time Clock
• 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 2100
• Serial I/O for Minimum Pin Count
• 2.0V to 5.5V Full Operation
• Uses Less than 300nA at 2.0V
• Single-Byte or Multiple-Byte (Burst Mode) Data Transfer for Read or Write of Clock or RAM Data
• Board Size: 44mm x 24mm

DS1302 RTC Real-time Clock module mainly makes use of DS1302 chip. It is an ultra-low-power multi-function clock/calendar chip that is released by DALLAS DS1302 is the company launched trickle charge the clock chip, which contains a real-time clock/calendar and 31 bytes of static RAM.

The DS1302 RTC Real-time Clock module provides seconds, minutes, hours, days, date, months, and year information. This real-time clock module communicates with a microprocessor via an I2C interface and has a battery backup

Note CR2032 Battery Not supplied 

Development  Resources: demo codes, schematics, datasheets, etc

Reference for Arduino and reference to all matters

Ardunio from Wikipedia

Resources: Instructables

Real-Time Clock – DS1302

Notes:

1. There may be slight size deviations due to manual measurement, different measuring methods and tools.
2. The picture may not reflect the actual colour of the item because of different photographing light, angle and display monitor.

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