PCB Design Best Practices - turnracing/turnracing-diy GitHub Wiki

Here are some best practices when it comes to designing your PCB!

Terminology

Trace = Copper lines on the PCB that are the equivalent of wires.
Pad = Exposed copper, often rectangles, that the component is soldered onto.
Via = A connection point between two or more layers
Net = Collection of the traces or pads that are linked together, ie. a GND net would define a trace or pad that is connected to ground.
Plane = A copper pour that can be connected to a Net.
Design Rule = A list of minimum values that your PCB must adhere to in order to pass a check and be successfully manufactured.

Recommended Trace Widths

Voltage 0.508mm/20 mil (for 5V / 500mA or less - calculate for anything higher)
Signal 0.254mm/8 mil
Ground 0.254mm/8 mil or 0.508mm/20 mil (for 5V / 500mA or less - calculate for anything higher)

Basic PCB Design

Set your design rule as per your PCB manufacturers capabilities (JLCPCB = https://jlcpcb.com/capabilities/Capabilities, EasyEDA should be set to match this by default)
Check the datasheet of the part you're using to see if there is any recommended circuits
Avoid 90 degree angles on your traces
Cross over traces of other nets at 90 degrees
Keep traces away from other traces or pads as per your design rule - check your PCB manufacturers capabilities
Make use of a Ground plane on your bottom layer, and place signal traces on the top layer

Advanced PCB Design

Use Net ports, NetFlag VCC and NetFlag GND in your schematics
Use differential pair routing for USB data traces as per the spec of USB and your PCB
Make use of a Ground plane on your top and bottom layer and automatically via stitch them together, manually place via's close to signal traces and anywhere the plane comes to a point/end (if the automatic placement has not covered the board well enough).
Keep signal traces on the top layer where possible, use short via traces on the bottom layer.

Via stitch example