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High Accuracy DS3231 I2C RTC Module w/ AT24C02 EEPROM for Arduino
Based on DS3231£¬ this is high-precision real-time clock module. DS3231 can not only do the timing£¬ set two alarms and it can also measure temperature. 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: 3.0 ~ 5.5VDC - Working current: 3mA (Max) - Interface: standard I2C interface (400kHz) - Timing accuracy: ±2ppm @ 0~+40'C; ±3.5ppm @ -40~+85'C - Temperature measurement accuracy: ±3'C - Temperature resolution: 0.25'C - SQW is programmable square wave output pin - Arduino Library: DS3231 - Great for Arduino DIY project