the article on the construction of the pxlBlck_RingClock is available at the following link. The RingClock is very similar to the pxlBlck_SlotClock. Only that the frame is a little more filigree. There is also the option to integrate an RTC in the housing of the RingClock. So the clock can also be operated without a time source via NTP or even wifi. :) Only downside in this case: Of course without wifi it wouldnt be able to receive and display notifications.
Build article is available here: https://nerdiy.de/en/howto-pxlblck-die-pxlblck_ringclock-aufbauen/