i made this shield to controlling a Gearbox on a Mercedes.
But it can be used to almost anything if you want to control things in an Old car.
It has a lot of input and output. that can be used direct.
And also has build in CANBUS CAN BUS MCP2515 (controller) and the MCP2551 (transceiver)
It is for the Mega 2560
I made a little document to show the feature,
What do you think of this ?