Comment by whynotmaybe
1 day ago
For me, it helped me to look at open source hardware like adafruit's.
The Mini Sparkle is a 4 layer and available on their github https://github.com/adafruit/Adafruit-Mini-Sparkle-Motion-PCB
There are many more available at OSHWA : https://certification.oshwa.org/list.html
I also did forget to mention, but this project is OSHWA certified too :D
https://certification.oshwa.org/ca000068.html
Number 68 in Canada? Nice!