take a look at the Bitaxe by skot. Its open source and a new version uses the BM1366 chip that are used in the S19XPs!

got a link for this?

There you go

https://bitcointalk.org/index.php?topic=5460574.0

And this one is the DIY for BM1397 chip,

https://d-central.tech/product/bitaxe-diy-kit/

The concept is rather interesting, If you have the time take a look at this DIY video https://www.youtube.com/watch?v=vS_Gs5xYmRk , you can learn how to build the thing yourself, great for a learning experience, I wonder if anyone here has tried to do that.