This Saturday I  ... of trying to make myself the smallest PCB that I've designed, I'm pretty happy with the result, but i don't think I'll be trying nothing like this any time soon lol

I made the vias using a 0.4mm drill bit and connected both sides with a thin wire a lot of patience

Passing the wires trough all the small holes

And soldering using solder paste and a heat gun

I think one led its good enough for this test, I learned that it is feasible to build such small PCBs, maybe next time I'll use a thinner material.

Here the first blink test using a nodemcu board and the homemade PCB

I'll order some PCBs from jlcpcb on Monday, I'm so excited! Let me know what you think :D