Create better PCBs

Image courtesy of Tom HeldDo you design your own printed circuit boards? Even 4 layer boards can be done by hobbyists today relatively cheap. For simple analog circuits, it is not very difficult to design a circuit that works well. But what about mixed analog/digital circuits? Or analog boards with lots of small components? Do you need 4 layers or is a two-layer-board enough? How should you route power supply lines? What about a ground plane? There are lots of things to think about.  Here are some links to documents that can help you to create better PCBs:

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