For practice and for getting an idea about PCB assembly prices, I created Gerbers and a BOM. They are based on Sparkfun's Arduino Pro Mini board (https://github.com/sparkfun/Arduino_Boards). I removed components that I don't need. See attachment for all files.
The Gerbers I exported using PCBWay_2 layer.cam (https://www.pcbway.com/img/images/activity/PCBWay_2_layer.rar). For the BOM I used the template that is linked from the article How to Build a BOM (Bill Of Materials) (https://www.pcbway.com/blog/PCB_Assembly/How_to_Build_a_BOM__Bill_Of_Materials_.html) on pcbway.com. Still I am left with various questions:
- What should I put at the top where it says xxxx xxxx xxxxx xxPCS BOM (Sample Bill of Materials)?
- Did I specify the capacitors and resistors correctly?
- How does the manufacturer know in which direction to insert the polarized capacitors C13 and C19?
- For the resonator, I guessed the package based on the spacing of the connections on the board: 3-SMD 0.126" L x 0.051" W (3.20mm x 1.30mm) Does that make sense?
Background: Eventually, I want to create my own boards for the network nodes in my project SAN (https://github.com/feklee/san). They would be built around an ATMega-328PB. I understand that I also need to add an interface for burning the firmware of the MCU. Anyhow, for making my own board, I want to learn KiCAD first.