Comparison of four real-time clocks

SwitchDoc Note

Do not hook up the Adafruit DS1307 board to your Raspberry Pi without clipping the pull-up resistors. You will burn out your I2C bus on the Raspberry Pi if you do. Read my previous column in Raspberry Pi Geek Issue 07 to see how to clip the resistors and use the Adafruit DS1307 on your Raspberry Pi.


The RTC test code and MatPlotLib code is up on GitHub [5], as are all of the Python RTC libraries for all of the tested RTCs. For example code for each RTC, go to the SwitchDoc Labs website [6]-[9].

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