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This type of situation brings up the question of circuit protection. Considering how easy it can be to fry the MPGuino, how easy would it be to damage the cars control system at the same time?
What I want to know is if there is a way to add circuit protection to the unit? Possibly optoisolators and fuses. Has anyone else tried this? Would the optoisolaters cause problems with signal delay or loss? I have looked at these units for a while but this is a situation that I have always worried about. I would personally isolate both the data lines and would install a fast acting fuse on the power line. Anyone else tried this? Could the car get damaged by sending 5v or grounding any of the lines?
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