The PCB thing is huge. Back in the 90s I was carefully tracing out circuits with a resist pen, etching them with a ferric chloride bath and hand-drilling the c

The PCB thing is huge. Back in the 90s I was carefully tracing out circuits with a resist pen, etching them with a ferric chloride bath and hand-drilling the component holes. Not only was this extremely finicky and time-consuming, it was expensive! I only ever made a handful of boards of my own design.