These pages are about designing our own custom printed circuit boards. Our driving project is the DIO Test board. We're starting by using software called kicad.
There's a decent set of kicad videos made by parts distributor Digi-Key: https://www.youtube.com/watch?v=vaCVh2SAZY4 .
Other text and video kicad tutorials can be found online.
On these pages are some hints and things to remember - without watching the videos for the 14th time.