Adafruit’s got a handy breakout board for the DS1307 RTC available. This chip isn’t nearly as accurate as the DS3231 used in the Chronodot but it’s quite a bit cheaper. The breakout makes ...
DS1307 modules are readily available, and often the cheapest RTC solution available at most ... The RV-1805 draws so little power that this Sparkfun module gets by without a backup battery at ...