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Digital Panel for your old car (blog.bricogeek.com)
submitted 2 years ago by to c/raspberrypi@lemmy.ml
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I found this tutorial about how to use a raspberry pi to add a digital panel to old cars (canbus port needed)

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[–] 8 points 2 years ago (4 children)

Seriously only downvotes?

Has no one driven a car with swapped wheels making the speed optimistic or pessimistic?

What about broken/missing temp sensors? Oil pressure gauges? Battery voltage?

The only thing you really need is a speed gauge, and you can get that from the wheels, the gearbox, and GPS. Making it easily three way redundant and have the ability to have a backup via your phone or manual gauge.

This looks like a good fun project, you could make it a HUD and keep all your old gauges.

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  • [–] 4 points 2 years ago* (last edited 2 years ago)

    For too many people, cars are beyond comprehension.

    Most people can't even explain how a toaster works.

    As Asimov said, it's like magic...its just not as advanced tech as one would think is required.

    The increased safety in cars since the 90's is mostly to do with massively improved cabin strength (see growth in A and C pillars), and airbags. Crumple zones already existed and were constantly being improved. But you can't control the crumple if the cabin collapses.

    I'm painfully aware of the lack of safety capability of my 80's car when I'm driving.

    Even cars in the 90's were still mostly using the same tech as always, with modest improvements.

    Speedo's didn't really start changing from cable until the 90's. Not that being super accurate is meaningful anyway - they never have been.

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  • [–] 1 point 2 years ago* (2 children)

    You don't even need to swap wheels. If a car is sold with multiple wheel size options, there's a solid chance that the speedo is calibrated for one size only.

    My car is a 2012 model and the speedo is off by at least 10% compared to speed radar displays I've driven by.

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  • [–] 2 points 2 years ago (1 child)

    That would be very naughty of the manufacturer on a 2012… the wheel speed sensor would be connected to a computer and speed PID reported on the canbus, the computer should be calibrated to the trim level of the car (and the wheels that it came with) to report the correct speed.

    Having said that manufacturers often overestimate speed by ~5% to prevent being blamed for speeding offences.

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