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by hunson_abadeer
1068 days ago
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Right, but that voltage modulation scheme can be distorted by the changing electrical characteristics of your car. Again, imagine a diesel heater kicking in, or windshield wipers, or some other variable load (phone charging)... you can have a clever fault-tolerant modulation scheme, but probably not if you want to also support "blink headlights" as a backup input method? Beyond that, I don't see the "simplicity" argument for analog. You're already messing with the vehicle's wiring. CAN bus is easily accessible from the passenger compartment. Or, running an extra data wire takes 10 minutes. Short-range RF can be easily secured in this application too. Plus, on many newer cars, USB charging ports are displacing 12 V outlets, so it's not even all that future-proof. It's not that I'm desperate to dislike this design, but I'm struggling to see the qualitative improvement over a billion aftermarket designs that most people just kinda don't use... |
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