Making an embedded Linux computer
Wow, I had mistakenly assumed that you couldn't do 0.8 mm BGAs on a hobbyist-level PCB. The solder lands are actually within recommendations.<p>The author mentioned that this is a test board without much hooked up. That really helps, since not every pin needs to be broken out. On a more complex design with higher pin coverage you'd need more layers to be able to route it all.