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 Any open source block clocks I can build for cheap? NVKs is too expensive. I mean I get it. They're small batch and nice, not overpriced. Just too expensive for me.  
 @djuri has some good stuff.

https://github.com/btclock/btclock_v2/wiki 
 Yeah! That's the project👆 
 That thing needs a couple more number places tho 🚀 
 It will switch to suffix mode when the time comes, with higher prices the last decimals become less significant. 
Or you can chain two of them and then you have 14 displays, there are SPI and I2C expansion ports available. 

https://m.primal.net/Luzm.png  
 See https://btclock.store for the DIY kit. If you want one I recommend to order fast since I will be away for two weeks after Friday... 
 Check out the cheap yellow display. 

Basically a esp32 with tft panel for like 20$