DS1307 Real Time Clock Memory Module by Ldabrye – PCB Precision IC

Description

Product Overview

The DS1307 Real Time Clock (RTC) Memory Module from Ldabrye is a compact, low‑power integrated circuit designed to keep accurate time in a wide variety of electronic projects. Built on a sturdy printed circuit board (PCB) substrate, the module combines a crystal oscillator, a battery backup input, and 56 bytes of non‑volatile SRAM, allowing it to retain date and time information even when the main power source is disconnected. The module operates from a 5 V supply and communicates via a simple I²C interface, making it compatible with most microcontroller platforms, including Arduino, Raspberry Pi, and ESP series boards. Its small form factor (approximately 1.5 × 0.5 in) fits easily onto breadboards and custom PCBs, while the solder‑pad layout provides a secure mechanical and electrical connection. The DS1307 is rated for a temperature range of –40 °C to 85 °C, ensuring reliable performance in both indoor and outdoor environments. With a typical accuracy of ±2 ppm at 25 °C, the module offers precise timekeeping suitable for data logging, scheduling, and synchronization tasks.

Usage

Designed with hobbyists, makers, and professional engineers in mind, the DS1307 module finds application in a broad spectrum of projects. In home automation, it can drive timed lighting, thermostat control, and security system schedules, guaranteeing that events occur exactly when intended. Robotics enthusiasts benefit from its ability to timestamp sensor data, coordinate multi‑motor actions, and manage state machines that require reliable time references. For educational purposes, the module serves as an excellent teaching tool for concepts such as I²C communication, power management, and real‑time data handling. Its battery backup capability means that once the time is set, the clock continues to run without interruption, even during power outages, making it ideal for remote weather stations, data loggers, and portable devices that must maintain accurate timestamps over long periods. The module’s straightforward wiring—VCC, GND, SDA, SCL, and a backup battery connection—allows rapid prototyping and seamless integration into existing designs.

Why Choose Us

Choosing the Ldabrye DS1307 RTC module means selecting a product that balances performance, durability, and ease of use. Each unit undergoes rigorous quality control testing, including functional verification of the I²C interface, battery backup operation, and crystal oscillator stability. The PCB is fabricated from high‑grade FR‑4 material, providing resistance to thermal stress and mechanical vibration, which is essential for projects that experience frequent handling or operate in harsh environments. Ldabrye offers comprehensive technical support, including detailed datasheets, wiring diagrams, and example code libraries for popular development platforms. In addition, a responsive customer service team is available to assist with integration challenges, firmware troubleshooting, and component selection, ensuring that users receive the guidance they need throughout the product lifecycle. With a competitive price point and a reputation for reliability, this module stands out as a cost‑effective solution for both prototype development and small‑scale production runs.

Key Features

• Compact PCB design fits easily on breadboards and custom PCBs, saving valuable space in tight layouts.
• Battery backup keeps accurate time even when main power is lost, ensuring uninterrupted operation.
• I²C interface provides simple, two‑wire communication compatible with most microcontrollers.
• Built‑in 56 byte SRAM allows storage of small data sets alongside time information.
• Responsive technical support and detailed documentation help users integrate the module quickly.

FAQ

What type of battery should I use for the backup power?

A standard 3 V coin cell such as CR2032 is recommended. The module includes a dedicated backup pin that connects directly to the battery, providing continuous power to the RTC when the main supply is disconnected.

Can the DS1307 module operate at 3.3 V?

Yes, the DS1307 is tolerant of 3.3 V operation, but you must ensure that the I²C pull‑up resistors are sized appropriately for the lower voltage to maintain reliable communication.

How accurate is the clock over long periods?

At 25 °C the DS1307 typically maintains an accuracy of ±2 ppm, which translates to about ±1 minute per year. Accuracy can be affected by temperature variations, so for applications requiring higher precision, consider adding a temperature‑compensated crystal oscillator.

Is the module compatible with Arduino libraries?

Absolutely. The popular RTClib library for Arduino supports the DS1307 out of the box, allowing you to set and read time with just a few lines of code.

What is the maximum I²C clock speed supported?

The DS1307 operates reliably up to 400 kHz (Fast‑mode I²C). For most hobbyist applications, the standard 100 kHz speed provides a good balance of stability and simplicity.