We have modified a large flat-bed plotter to apply acid-resistant ink directly to copper-clad insulator, and to drill the holes for through-board connections. This plotted circuit board technique greatly speeds up production in prototyping stages, and allows the generation of very complex patterns on large (1.2 m×2.4 m) boards. We discuss briefly the standard methods of circuit board production, and outline the plotted circuit technique. This technique was originally developed in order to produce readout boards for the AMY electromagnetic calorimeter. We discuss some of the features of those circuit boards, as well as our more recent activities in prototyping delay-line circuits.