Have decided to buy my first piece of automotive test equipment-- an ELM327 OBD-II laptop computer interface. $10 from a top-rated seller on the giant auction website.
The ST1119 IC is said to be better, but only one place I can find sells a finished module and it's $60. I'm not ready to devote a lot of time to a soldering iron if I can avoid it. I know I'll have to, but every piece of equipment I can buy, I will.
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