PCF8523 Real Time Clock for Raspberry Pi

PCF8523 Real Time Clock for Raspberry Pi

Marsoni

M251S

$10.69

Get it in 3 business days with 1 day shipping. Friday, May 29

PCF8523 Real Time Clock for Raspberry PiDESCRIPTION This is a great battery backed real time clock (RTC) that allows your Raspberry Pi project to keep track of time if the power is lost. Perfect for data logging, clock building, time stamping, timers and alarms, etc. Equipped with PCF8523 RTC, it works great with the Raspberry Pi and has native kernel support. Works perfectly with any Raspberry Pi (or similar single board linux computer) including the Pi 1, Pi 2, Pi 3, Pi Zero, A+, B+, Pi

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It is very nice, I have many watches, but this one is the main one I use for casual wear. One thing I do not like: After about two days of either use or not use, the time gets off, by a couple hours but you can put it back pretty easily. And the "day display" on the watch never stays correct due to the fact that every month doesn't have 31 days in it. But other than that, it is a great watch for show, not to keep track of time.

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Reviewed in the United States on April 11, 2026