Few days ago I found a perfect open source alternative for expensive overpriced blockclock by coinkite(coldcard.
I am already boycotting all NVK-coldcard products and I hope he won't be angry and pissed (again) because someone made cheaper and better product (again) and made it open source.

Let me present you BTClock , made by Djuri B. from Netherlands.
Open-source block-shaped clock that is showing Bitcoin related information including Block height, Moscow Time (Sats per Dollar), Price, Time, Halving Countdown.

You can currently purchase BTClock fully assembled and tested for €190, or you can purchase individual parts and build it yourself.
It is using genius design with multiple small eInk displays mounted on top of PCB.
Compared to $400 for nvk-mini, this is a bargain!

https://www.talkimg.com/images/2024/01/11/sO4S1.jpeg  https://www.talkimg.com/images/2024/01/11/sO79W.png

Build instructions:
https://github.com/btclock/btclock_v2/wiki

Source code: https://github.com/btclock

Official website: https://btclock.store/