DS1307 Real Time Clock (RTC) Module
The DS1307 Real Time Clock (RTC) Module is a popular timekeeping module designed to maintain accurate time and calendar information even when the main system power is removed. Based on the DS1307 RTC IC, it communicates via the I2C interface, making it easy to connect with Arduino, Raspberry Pi, ESP32, STM32, PIC, AVR, and many other development platforms. A backup coin cell battery ensures that the clock continues running during power outages, preserving the current time and date.
This module is ideal for applications requiring reliable timekeeping, such as data logging, automation systems, clocks, alarms, timers, and IoT devices. Many versions also include an onboard 32.768kHz crystal oscillator and AT24C32 EEPROM for additional non-volatile data storage, making the module a versatile solution for embedded electronics projects.
Features:
- Accurate real-time clock and calendar functions.
- Battery backup for continuous timekeeping during power loss.
- Simple I2C communication interface.
- Supports seconds, minutes, hours, day, date, month, and year.
- Automatic leap year compensation.
- Low power consumption.
- Onboard crystal oscillator for stable operation.
- Easy interface with popular microcontrollers.
- Compatible with Arduino, Raspberry Pi, ESP32, STM32, AVR, and PIC.
- Compact PCB for embedded applications.
- Optional onboard EEPROM on many module versions.
Specification:
| Parameter | Value |
|---|---|
| RTC IC | DS1307 |
| Communication Interface | I2C |
| Operating Voltage | 5V DC |
| Backup Battery | CR2032 Coin Cell (not always included) |
| Clock Accuracy | Depends on crystal accuracy |
| Time Format | 12-hour / 24-hour |
| Calendar | Year, Month, Date, Day |
| Time Data | Hours, Minutes, Seconds |
| Leap Year Compensation | Supported |
| Crystal Frequency | 32.768kHz |
| EEPROM | AT24C32 (available on many versions) |
Pinout:
Applications:
- Digital clocks.
- Alarm systems.
- Data logging projects.
- Home automation.
- Industrial controllers.
- IoT devices.
- Scheduling systems.
- Attendance systems.
- Time-stamping applications.
- Embedded control systems.
Package Includes:
- 1x DS1307 Real Time Clock (RTC) Module.