DS1307 RTC Module v1.1 with CR1220 Battery - I2C Real Time Clock for Arduino

DS1307 RTC Module v1.1 with CR1220 Battery - I2C Real Time Clock for Arduino

Keep accurate time in your projects with the DS1307 Real Time Clock module. This OPEN-SMART RTC v1.1 board features the reliable DS1307 RTC IC, a pre-installed CR1220 backup battery to maintain time even when main power is off, a 32.768kHz crystal, and a clean 4-pin I2C interface - ready to connect to any Arduino, ESP32 or microcontroller in seconds.

Key Features

• DS1307 RTC IC - accurate timekeeping: seconds, minutes, hours, day, date, month, year
• CR1220 coin cell battery pre-installed - maintains time without main power supply
• 32.768kHz crystal oscillator - precise clock source included on board
• 4-pin I2C interface: SCL, SDA, VCC, GND - easy connection to any microcontroller
• SQW / OUT pin - programmable square wave output for clock and interrupt applications
• Compact blue PCB with mounting holes - OPEN-SMART branded, quality construction
• Compatible with Arduino, ESP32, ESP8266, STM32 and Raspberry Pi

Specifications

• RTC IC: Maxim DS1307
• Interface: I2C (SCL, SDA)
• I2C Address: 0x68 (fixed)
• Supply Voltage: 3.3V - 5V DC
• Battery: CR1220 3V coin cell (included)
• Crystal: 32.768kHz
• Output: SQW / square wave output pin
• Timekeeping: Seconds, minutes, hours, day, date, month, year with leap year compensation
• PCB Color: Navy Blue
• Brand: OPEN-SMART

Perfect For

• Arduino and ESP32 Data Logger with Timestamps
• Digital Clock and Alarm Projects
• Scheduled Automation and Timer Systems
• IoT Devices Requiring Accurate Timekeeping
• Smart Home Controllers and Event Schedulers
• Battery-backed Time Retention in Embedded Systems

Order now and add reliable real-time clock functionality to any Arduino or ESP32 project.