Stop designing the same board twice.

Every board here builds, routes and ships its whole review package — the prompt that made it, a BOM of curated in-stock parts, gerbers, a netlist, a copper analysis, DRC results, SPICE scenarios, and an explicit list of what has not been validated. Search by what you want it to do, pull the whole design, and start from a real board instead of a blank file. Read each board's status before you fabricate it — most are engineering prototypes, not released designs.