1.5 KiB
Mockingboard schematic and PCB layout
This is a recapture of the Tom Arnold schematic hosted by ReactiveMicro. (A copy is included within for reference.) If I had to guess, it was produced with EAGLE, which was a reasonably popular EDA package at the hobbyist/maker level at the time. This time, I've rearranged the schematic in KiCad, which is fully open-source and likely to remain so for the foreseeable future, while equaling or exceeding EAGLE in its capabilities (without the subscription nonsense that Autodesk has bolted onto EAGLE since its acquisition).
With the schematic, I've tried to keep signals mostly moving from left to right. I've added a few bypass capacitors that weren't in the original schematic, but show up in photos of the assembled cards. I've applied some of the fixes to the design issues noted in the ReactiveMicro wiki.
I imported the original gerbers into the PCB file and have matched up footprints and locations. This prompted a few changes to the schematic to accommodate missing connections, as the gerbers are of a presumed-working configuration. The next step is to regularize the traces as much as possible (run them at multiples of 45° instead of arbitrary angles) and perhaps switch some resistor and capacitor footprints so they won't overlap.