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High Accuracy DS1307 I2C RTC Module with AT24C02 EEPROM for Arduino
Based on DS1307£¬ this is high-precision real-time clock module. Onboard AT24C02 EEPROM£¬ you can record more alarms and events information. Onboard CR1220 battery holder£¬ it is convenient to keep timing when main power to the device is interrupted. Features: - Compatibility: Compatible with Arduino UNO R3 / Arduino Mega2560 - Working voltage: 4.5 - 5.5V DC - Working Current: 3mAh (Max) - Interface: standard I2C interface - Timing accuracy: ± 10ppm - SQW is programmable square wave output pin - Arduino Library: RTC - Great for Arduino DIY project