Opendiag OBD-II Schematics & PCB Layout
Back in 2000, I created my first open-source hardware: An RS-232 to OBD-II interface. I’m no longer interested in this project, but it gets a surprising amount of traffic every day. I’m keeping it available for those who want it.
Today there are far better approaches for connecting computers to cars, so please keep in mind that this information hasn’t been updated since 2002.
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