This is a simple little real time clock (RTC) breakout board based on the PCF8523 chipset. The breakout allows your microcontroller project to keep track of time even if it is reprogrammed, or if the power is lost. It is perfect for datalogging, clock-building, time stamping, timers and alarms, etc. This new version of the board now includes STEMMA QT / Qwiic connectors making this easier than ever to use!