DS1307 Real Time Clock (RTC) Module for Arduino

The DS1307 Real Time Clock (RTC) Module is a low-power, full binary-coded decimal (BCD) clock/calendar with 56 bytes of NV SRAM. It communicates via the I2C protocol, making it easy to connect with Arduino, Raspberry Pi, and other microcontrollers.

This module keeps accurate time (hours, minutes, seconds) and date (day, month, year) — even during power loss — using its CR2032 backup battery. The DS1307 RTC is ideal for projects that require precise time tracking such as data logging, alarms, event scheduling, and automation systems.

Available exclusively at Electroxbd, Rajshahi, Bangladesh — your Trusted Source for Reliable Electronic Parts.

⚡ Features of DS1307 Real Time Clock Module

• Real-Time Clock Functionality: Keeps time and date continuously.

• Battery Backup: Retains time even during power interruptions.

• I2C Interface: Simple two-wire serial communication.

• Low Power Consumption: Ideal for battery-operated systems.

• Wide Voltage Range: Works with 3.3V and 5V logic.

• Built-In 56 Bytes NV SRAM: Store small user data conveniently.

• Compact Design: Fits easily into embedded systems.

• High Accuracy: Maintains stable timekeeping with minimal drift.

🧠 Working Principle

The DS1307 RTC module uses an I2C communication interface to send and receive data with the microcontroller. The DS1307 chip includes a crystal oscillator and backup battery, ensuring continuous timekeeping even without an external power supply.

When powered, the Arduino communicates with the module using the SDA and SCL pins. The module returns time and date values, which can be displayed on an LCD, saved to EEPROM, or used to trigger events like alarms or data logging.

The backup battery ensures that the time and date remain accurate even when your main power source is disconnected — perfect for standalone and long-term monitoring systems.

⚙️ Technical Specifications

• IC: DS1307 RTC

• Communication Interface: I2C (SDA, SCL)

• Operating Voltage: 3.3V – 5V DC

• Clock Format: 12-hour or 24-hour selectable

• Backup Battery: CR2032 lithium cell (included)

• Memory: 56 bytes NV SRAM

• Accuracy: ±2 minutes per month (typical)

• Oscillator: 32.768 kHz crystal oscillator

• Operating Temperature: 0°C to +70°C

• Dimensions: Approx. 28mm x 25mm

• Weight: 10g (approx.)

🧩 Applications

1. Data Logging Systems – Record accurate time and date for every data entry.

2. Alarms & Reminders – Trigger actions or notifications based on set times.

3. Home Automation Systems – Schedule devices to operate at specific times.

4. IoT Devices – Integrate real-time tracking for smart IoT applications.

5. Robotics Projects – Sync time-based movements and functions.

6. Digital Clocks – Build your own Arduino-powered clock.

7. Event Scheduling Systems – Automate timed events in electronic systems.

8. Energy Monitoring Projects – Track consumption with precise timestamps.

This module is ideal for students, developers, and professionals looking for reliable real-time tracking in their embedded projects.

💻 How to Use with Arduino

1. Connect SCL → A5, SDA → A4, VCC → 5V, GND → GND.

2. Install the RTClib library in the Arduino IDE.

3. Load the DS1307 example sketch to initialize the module.

4. Upload the sketch to read or set the current time.

5. Display the time using Serial Monitor or an LCD screen.

This simple setup allows your Arduino to keep accurate time even when powered off, thanks to the onboard CR2032 battery.

🧾 Advantages

• Maintains accurate date/time during power failures

• Compatible with all major microcontrollers

• Compact and easy to integrate

• Built-in memory for small data storage

• Low cost, reliable, and essential for time-based automation

🏪 Why Buy from Electroxbd

• 100% tested DS1307 RTC modules for accuracy

• Affordable pricing for students and professionals

• Fast delivery all over Bangladesh

• Friendly customer support for Arduino projects

• Located in Rajshahi, your local electronics supplier

Electroxbd guarantees you reliable modules for stable timekeeping in all projects.

📍 Our Office Address:

Electroxbd
H#1/1, Opposite of RH Chhatrabash, Madrasa More,
Debisingpara, Boalia, Rajshahi, Bangladesh.

✅ Conclusion

The DS1307 Real Time Clock RTC Module for Arduino is a vital component for projects that require consistent time and date management. With its I2C communication, battery backup, and high precision, it ensures your devices stay synchronized — even when the power goes out.

Buy the DS1307 RTC Module today from Electroxbd, Rajshahi — your Trusted Source for Reliable Electronic Parts in Bangladesh.

Common Questions:

Q: What is the price of DS1307 Real Time Clock RTC Module For Arduino in Bangladesh?

A: The latest price of DS1307 Real Time Clock RTC Module For Arduino in Bangladesh is 130 BDT.

Q: Where to buy DS1307 Real Time Clock RTC Module For Arduino in Bangladesh?

A: You can buy the DS1307 Real Time Clock RTC Module For Arduino at the best price from ElectroXBD in Bangladesh.