Hi, I wanted to see if there is free software that I can use to design a simple two-sided circuit board (top and bottom layer only). I need something that will be compatible with the DKRed and PCB Builder service when I finish the design. Thanks.
Welcome to the Digi-Key Technical Forum. You should be able to use the KiCad EDA tool. Here is the link : https://www.digikey.com/en/resources/design-tools/kicad?_ga=2.237566921.815038075.1664383094-1846503222.1664383094
This will work with the DKRed and PCB builder.
If you choose to use Kicad, after you’ve gotten your board designed instructions on how to generate the design files for DKRed are located here: