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Thread: Proposed idea

  1. #1
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    Proposed idea

    I have been toying with the idea of putting a carputer in my 1992 Dodge D250 truck. I have lots of space in the dash area. I am wanting to completely remove the analog gauges and put a 7 or 8 " screen where the speedo is right now. I want to competely replace that with a lcd gauge cluster powered by a mac mini. My question is how do I get compatible inputs from the analog sending units. Is there a universal sending unit converter, or how do I handle this?

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    Just be careful if this is going to be used on public roads....in the U.S. that can be illegal.

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    MySQL Error soundman98's Avatar
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    Quote Originally Posted by justchat_1 View Post
    Just be careful if this is going to be used on public roads....in the U.S. that can be illegal.
    what law does that fall under? i have periodically kept up on the digital gauge threads that pop up, and have not seen to much mention of that.

    i believe that you would need a fusion brain(or similar) to get the signal into the computer, and dash command software(not sure if either work with mac though).

    the problem that all of the digital gauge idea threads run into is that you will really need to setup a dedicated computer specifically for the gauges, and will also need system redundancy-- at least 2 power supplies, maybe even 2 computers.

    most of the threads move from replacing the factory gauges to adding a screen near them to get more information. it doesn't matter if you want to run linux, mac, or pc, i have not heard of any computer os that didn't have some sort of problem(s) after tons of shutdowns and startups. the general consensus is that while home built computers are a great novelty item in a car, they are simply not reliable enough to trust as the main way you know what the car is doing.

    search around the forums for digital gauges, or similar terms-- there should be at least a couple threads on the matter.

    sorry, just re-read all of that-- and it comes off very negative-- i don't mean to shoot you out of the sky, i am just trying to make sure you realise the full consequences of using a computer based system to monitor most vehicle functions.

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    Novelty?

    Novelty? a carputer correctly build and configured is as reliable as the factory gauges, I mean factory gauges where built by human as well.

    What do you guys think?

    "Most of the users you'll see in this site are still learning specially me"

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    Quote Originally Posted by soundman98 View Post
    what law does that fall under? i have periodically kept up on the digital gauge threads that pop up, and have not seen to much mention of that.
    Neither had I until recently but apparently using a computer screen instead of gauges could be illegal if the screen is not functioning properly (very likely with the hackjob thats required). I'm not sure if its a minor ticket, a major thing or even something few cops would know about but I did hear it from a reliable source.

    Quote Originally Posted by popi79 View Post
    Novelty? a carputer correctly build and configured is as reliable as the factory gauges, I mean factory gauges where built by human as well.

    What do you guys think?

    A simple micro-controller running only basic logic is very very robust. A personal computer running a full operating system and additional software on top of it has thousands of times more potential for failure.

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    MySQL Error soundman98's Avatar
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    Quote Originally Posted by justchat_1 View Post
    Neither had I until recently but apparently using a computer screen instead of gauges could be illegal if the screen is not functioning properly (very likely with the hackjob thats required). I'm not sure if its a minor ticket, a major thing or even something few cops would know about but I did hear it from a reliable source.
    hmm, i wonder if this is part of the "video screen should not be viewable to the driver in a moving vehicle" law. i can defiantly see how they relate, just never heard of it yet-- will have to keep that in mind.

    i imagine then that it would be at the cops discretion(like most violations like that)-- so be nice when he pulls you over

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    Quote Originally Posted by soundman98 View Post
    hmm, i wonder if this is part of the "video screen should not be viewable to the driver in a moving vehicle" law. i can defiantly see how they relate, just never heard of it yet-- will have to keep that in mind.

    i imagine then that it would be at the cops discretion(like most violations like that)-- so be nice when he pulls you over
    Does that mean that everyone driving with a HUD in the new european cars are driving illegally?

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    Quote Originally Posted by soundman98 View Post
    hmm, i wonder if this is part of the "video screen should not be viewable to the driver in a moving vehicle" law. i can defiantly see how they relate, just never heard of it yet-- will have to keep that in mind.

    i imagine then that it would be at the cops discretion(like most violations like that)-- so be nice when he pulls you over
    You have tweaked a nerve with me about all this distraction crap while driving. If cell phones, and lcd displays are considered a distraction, then the gov't should outlaw passengers, children, radios and make it mandatory that all vehicles be equip'd with a unidirectional viewfinder to keep you from seeing anything but the road in front of you. This is all a crock of Cr**. I will concede that texting is a hazard, but talking on cell is in the same category as conversing with a passenger or yelling at the kids or checking out the hot chick on the sidewalk. That is my 3.5cents.(adjusted for taxes and inflation).

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    Back to the original Q's: I have read that pre '96 vehicles are OBDI, am I going to have to create my own interface cable? My dodge is a diesel so it does not have very many gauges or sensors. It only has ABS, Water in Fuel, and has an electrically driven speedo, temp gauge, fuel gauge, and volt meter. Each of the gauges is interfaced with a ribbon cable. I am thinking that I can go to the mfr and get the pinouts and create somekind of interface Am I way off the mark?

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    MySQL Error soundman98's Avatar
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    if you are only interested in replacing only the gauges that are on the factory panel, and will not be adding any, than it should be as 'simple'(loosely speaking-- it is definitly not easy) as connecting the correct wire to a computer input device-- and then programming the computer to tell it what to do when it gets a signal(or varied signal) on that wire.

    though, if you want to add gauges, then you will probably need to add the appropiate sensors.

    and i hear ya on distractions, that is sometimes why it is at the cops discression (i imagine that they could also give a ticket for being distracted while driving for yelling at the kids in the back seat)--though i don't agree with the blinders comment-- then you won't be able to see idiots darting out from side streets, or the pretty ladies!

    from what i understand, the law for the video screens was put in place because a video screen is at least, if not worse than texting-- it just draws your attention with flashing pictures, and is the reason all aftermarket dvd/nav units have that annoying warning on them. the hot chick, conversation with the passenger, or kids in the back seat are all distracting, but are only usually temporary compared to a video (moving image on a screen) playing in front of the driver.

    just note: i am kind of playing devils advocate here--i have disabled the parking brake feature on my personal dvd hu i dont support the laws, i only learn them to find a way around them...

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