Reverse to schematic, or reverse to board-layout ("gerber") level? The schematic typically doesn't care about things like hole spacing, although it might be att

Reverse to schematic, or reverse to board-layout ("gerber") level? The schematic typically doesn't care about things like hole spacing, although it might be attached as footprint metadata to a component. Once you have some nice clean scans which align properly, there exist programs[0] which will turn it into a netlist for you. Then when you're at the stage of producing the new board-layout, printouts (especially on transparencies) at 1:1 to compare against the original board are invaluable. [0] http://www.scancad.com/products/fab.php http://www.scancad.com/products/fab.php is one, I'm sure I've seen free/OSS ones though. https://stacks.stanford.edu/file/druid:np318ty6250/Johnson_Reverse_Engineering_PCBs.pdf https://stacks.stanford.edu/file/druid:np318ty6250/Johnson_R... is more what I'm thinking of, but doesn't appear to provide sources for their work.