Real Time Clock RTC + battery - SparkFun

Module with real time clock and backup battery (battery included). Allows you to read the time in hours, minutes, and seconds date: month, day, year. The communication interface is an I2C bus.

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Price 47,00 zł



Product replaced by the new version: RTC + battery DS1307 v2.




Module with real time clock and backup battery. Allows you to read the time in hours, minutes, and seconds date: month, day, year. The communication interface is I2C bus (SDA and SCL), data update frequency is 1 Hz (1 second). Included in the battery module allows potrzymanie operation of the system up to 9 years without external power.



  • Supply voltage: 5 V
  • Current consumption: less than 500
  • The interface of communication: I2C / TWI (SDA, SCL)
  • Update rate: 1 Hz (1 second)
  • Available data:
    • Time: time (AM, PM), minute, second
    • Date: month, day, year
  • The ability to save data via battery (included)
  • Accurate calendar up to 2100
  • Internal memory total: 56 bytes
  • Tile sizes: 20 x 20 mm (details in documentation)



Voltage supply 5 V connected to pin significant with the same symbol. The I2C bus must be connected to the findings of SCL - clock line and SDA is the data line. Pin SQW output is a square signal with the selected frequency (see page 3 of the documentation). GND is the ground system.


Connection system facilitates tutorial and example for users of Arduino.



Conclusions are fields solders for wlutowanie goldpin connectors (2.54 mm pitch). Thanks to them, it is possible to connect the system with the breakout Board or the main module (for example, STM32Discovery or Arduino) via wires.


The set does not contain strap goldpin, it can be purchased separately.

On request, we can provide the model with zlutowanymi senior goldpin. For this purpose, please leave the details in comments to the order. Option is available only when you purchase strap goldpin.





Posting the payment for the order on our account on a business day up to 13:00 means sending the goods on the same day!


The time of payment depends on the hours of ELIXIR session of the sender's bank and the recipient of the transfer (more information on this subject, for example on the website


The table presents available forms of delivery in Poland


Carrier and

Bank wire

by cash


Poczta Polska

terms of service

9,90 PLN17,90 PLN1-3 days

Kurier GLS

terms of service

14,90 PLN22,90 PLN

1-2 days

Paczkomaty 24/7 

terms of service

12,90 PLN-1-3 days

If the amount to pay for products exceeds 500 PLN
Delivery is for free!


  • Free delivery of orders over 500 PLN does not apply to parcels addressed outside of Poland.
  • Free delivery does not apply when changing orders.
  • The delivery period is counted in working days from the date of dispatch of the order.