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The battery-backed real time clock (RTC) from Adafruit allows your microcontroller project to keep track of time even if it is reprogrammed, or if the power is lost. Perfect for datalogging, clock-building, time stamping, timers and alarms, etc. The DS1307 is the most popular RTC chip, and works best with 5V-based chips such as the Arduino or Raspberry Pi!
Please Note. Tighter shipping regulations introduced in 2017 relating to the shipping of battery products means this item is shipped without a battery. We do stock the required CR1220 battery here, however batteries can only be shipped to UK and certain EU destinations via DHL ground services. For a full list of available Lithium Battery shipping destinations please click here. If your country is not listed, we cannot ship a battery to you, and recommend that you purchase one locally.