This repo is a part of the Hitchco MK4 project. You can read more about the project here.
The PCB was designed in KiCAD and manufactured by OSHPark. It's essentially a giant shield for an Arduino Mega that drives many Power MOSFET devices, and conditions the inputs from the car. It also has many connectors for illuminated pushbuttons.
Many through-hole components were used for ease of assembly, and overall design simplicity.
The following diagram describes how signals are moved through the system:
