Adafruit PCF8523 Real Time Clock Assembled Breakout Board.
This is a great battery-backed real time clock (RTC) that 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. Equipped with PCF8523
RTC - it can run from 3.3V or
5V power & logic!
Works great with an Arduino, CircuitPython and the Raspberry Pi.
Note: This product does not come with a CR1220 coin cell battery.
- PCB & header are included
- Plugs into any breadboard, or you can use wires
- Two mounting holes
- Will keep time for 5 years or more
The PCF8523 is simple and inexpensive but not a high precision device. It may lose or gain up to 2 seconds a day. For a high-precision, temperature compensated alternative, please check out the DS3231 precision RTC. If you need a DS1307 for compatibility reasons, check out the DS1307 RTC breakout