Cool, i wish i had the skills. I'm planning to learn PCB design to build a low power low cost PCB based in the SG2002/LicheeRV Nano design with a MAX17043 battery gauge, gpio buttons and a battery controller like TP4057.
That's cool as a project, but I don't really see the point. Everything's hungry for memory these days. DDR3 is a relative bargain. Why not put a socket on there so you can add a cheap 8GiB laptop DIMM?
Hey! Not everything needs to have a point. (Or else why would there be 20 AI models competing) I did this mostly for the fun and challenges, because why not! :-P
I plan on running Kubesolo on them since 1.0 was recently released.[2]
[1] https://pine64.org/devices/pine_a64/
[2] https://github.com/portainer/kubesolo
Let me know if you are interested ;-)