14. PCB and Parts

14.1. Description

A printed circuit board (PCB) mechanically supports and electrically connects electrical or electronic components using conductive tracks, pads and other features etched from one or more sheet layers of copper laminated onto and/or between sheet layers of a non-conductive substrate. Components are generally soldered onto the PCB to both electrically connect and mechanically fasten them to it.

Printed circuit boards are used in all but the simplest electronic products.

CityOS Air has its own PCB version that could be downloaded from here.

14.2. Where to buy?

PCB	Recommended PCB manufacturer: https://www.allpcb.com/ Select: Height: 53 mm Width: 54 mm Layers: 2 Thickness: 1.6 All other selection options should be the default ones.
eBay	Pin Headers: https://ebay.to/309bIgu
AliExpress	PCB Board Screwless Spring Terminal: http://bit.ly/37RKxcB Select: 4P