RTC I2C Real Time Clock Module 5PCS AT24C32 DS1307 Arduino compatible

Description

Product Overview

The DAOKAI 5‑piece RTC I2C Real Time Clock module is engineered to provide developers with a compact, high‑accuracy timing solution that integrates seamlessly into a broad spectrum of embedded systems. Each kit includes five identical modules, each featuring the industry‑standard DS1307 real‑time clock chip paired with a 32 Kbit AT24C32 EEPROM memory. The DS1307 communicates over the I²C bus, allowing straightforward connection to any microcontroller that supports I²C, such as Arduino, AVR, ARM Cortex‑M, and PIC devices. The module is built on a small SMD footprint, measuring just 4.09 × 3.07 × 0.51 inches, and weighs only 0.71 oz, making it ideal for space‑constrained applications.

Beyond the core timing functionality, the module incorporates a dedicated charging circuit for a 2032 rechargeable lithium battery. This battery, when fully charged, can sustain the DS1307 clock for up to one year without external power, ensuring uninterrupted timekeeping even during power outages. The design also includes automatic brown‑out detection and seamless switching between main power and battery backup, guaranteeing data integrity and reliable operation.

Usage

Designed for hobbyists, educators, and professional engineers, this module fits a variety of use cases. In hobbyist projects, it can be used to add date and time stamps to data logging systems, control timed events in home automation, or synchronize displays in wearable devices. In educational settings, the module serves as a hands‑on tool for teaching I²C communication, timekeeping algorithms, and low‑power design principles. For industrial applications, the module’s robust battery backup and low power consumption make it suitable for remote sensors, environmental monitoring stations, and any system that requires reliable time reference without frequent maintenance.

The module’s I²C address is configurable, allowing multiple devices to be cascaded on the same bus. This feature enables developers to expand their system with additional EEPROM or sensor modules without address conflicts. The included AT24C32 EEPROM provides non‑volatile storage for configuration data, calibration parameters, or user settings, ensuring that critical information is retained across power cycles.

Why Choose Us

DAOKAI is a recognized manufacturer in the semiconductor market, known for delivering components that meet stringent quality standards. Each module undergoes rigorous testing for timing accuracy, power consumption, and durability before shipment. Our commitment to quality is reflected in a 4.6‑star rating from over 20 verified customers, highlighting reliability and ease of integration.

We provide comprehensive documentation, including wiring diagrams, example code for popular development platforms, and detailed specifications. Our technical support team is available to assist with integration challenges, firmware updates, and troubleshooting, ensuring that you can get your product to market quickly and confidently.

Furthermore, the module is backed by a warranty that covers manufacturing defects, reinforcing our confidence in the product’s longevity and performance.

Key Features

• High‑precision DS1307 RTC with automatic leap‑year compensation for accurate date and time.
• Integrated AT24C32 EEPROM provides 32 KB of non‑volatile storage for user data.
• Built‑in charging circuit for 2032 lithium battery delivers up to one year of backup power.
• Low power consumption and automatic brown‑out detection ensure reliable operation in energy‑constrained environments.
• Responsive customer support and comprehensive documentation for fast development.

FAQ

Does the module include a battery?

No, the kit does not include a 2032 lithium battery. You will need to purchase a compatible battery separately and insert it into the designated holder on the module.

Can I use multiple modules on the same I²C bus?

Yes, the DS1307 address can be changed via solder pads, allowing you to cascade several modules together without address conflicts.

What is the operating voltage range?

The module operates from 2.0 V to 5.5 V, making it compatible with both 3.3 V and 5 V logic levels commonly found in Arduino, AVR, and ARM platforms.

How do I program the EEPROM?

You can use standard I²C EEPROM libraries available for Arduino, STM32, and PIC to read and write data to the AT24C32 memory. Example sketches are provided in the documentation.