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  • Sensing Car Speed, Temperature, Engine Revs e.t.c

    Right I've been having a think about this for a while and I've been trying to find out how to interface a series of sensors (e.g. temperature sensors and voltmeters) so as to be able to determine the car speed / fuel remaining e.t.c. But, I can't seem to find an easy way to read values from these sensors. At school we had these funny "sense and control" boxes that ran off the com ports and could accept various sensors. But, they were very expensive! Any ideas folks - I'm writing software in VB and if I ever get this all sorted it will all be open source

    Cheers

    Andrew
    Mediabox Hardware Project
    Current Stage: A complete redesign, although not much happening right now!

    Mediabox Software Project
    Status: Writing Sync Software (still) and playing around with interface
    To do: Far too much!

  • #2
    Check out http://www.autotap.com/ & http://www.obdiicsu.com/ScanTools/ScanTools.asp
    http://www.mp3car.com/usersites/Maveric/ M.A.V.I.C. System
    Asus MB, PII 266, 192 MB Ram, 6.8" LCD, 6 Disk CD-ROM, 21 Gig HD, All-in-Wonder Video w/ TV Tuner, Irman, Windows ME, Winamp, Cobra III -- All in a custom acrylic case.

    http://www.mp3car.com/usersites/listings/ MP3car Listings - Please add to it! :)

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    • #3
      i have a parallel port device that came as a kit from an electronics company here in australia . dick smiths... cost $40 AUD can take 10 analog inputs etc etc.... i have posted about this elsewhere on this board..... try searching about it.... if you want i can scan the circuit and pm it to you ???
      Volvo V40 Phase 2 2002. T4 turbo upgrade.... currently no mp3 or carputer..... researching options

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      • #4
        Yeah - that would be cool! Cheers.
        Mediabox Hardware Project
        Current Stage: A complete redesign, although not much happening right now!

        Mediabox Software Project
        Status: Writing Sync Software (still) and playing around with interface
        To do: Far too much!

        Comment


        • #5
          Andrew,
          I was thinking along the lines as well...but mine was more towards reading data out of a Haltech programmable ecu since its DOS based. I guess yours would be much better as it would be more flexible and not to mention affordable... I think the best way to get info would be to tap to the ecu. But of course that means that you would have to know which wires to tap to not to mention that there are countless ecu designs out there. But most aftermarket parts such as apexi vafc comes with instructions for most cars...

          Another way is to build seperate sensors and hook 'em up to the computer... but it could get quite messy..

          The next step forward would be wrenching out your speedo and rev meters and replacing them with lcds...rally car style...hehehe

          while you're at it, how bout interfacing to the power windows and central locking as well?

          azzri

          p/s : Sorry bout the lousy english.
          Sproggy Mk2.8 & shutdown controller
          Via C3 800 mini-Itx 256mb Ram, 15G notebook HDD

          Life is like a Proton. You never know what you will get, but sooner or later, something will go wrong coz its a Proton!

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          • #6
            My friend found something interesting....not quite what i have in mind but something along the line i

            guesshttp://board.mr2faq.com/showthread.php?s=&threadid=31291

            Paladin
            Sproggy Mk2.8 & shutdown controller
            Via C3 800 mini-Itx 256mb Ram, 15G notebook HDD

            Life is like a Proton. You never know what you will get, but sooner or later, something will go wrong coz its a Proton!

            Comment


            • #7
              Thats kinda what I want to do, although I can't really tap into any of the existing sensors cause well there arn't any

              Its an old (1993) diesel Vauxhall (GM) Cavallier car (actually my dads but he is giving it to me when I go to uni), and it doesn't have any kind of engine management system (AFAIK). I will do a bit of investigating, but everything is old (the spedometer is cable driven, not electronic!). I guess stuff like fuel level would be easy enough, but I originally wanted to replace the fuel gauges e.t.c. with a nice tft and have it only displaying fuel / temp stuff when there is a problem and on startup. Cheers for the info - perhaps I just need a new car...

              I'm already working on the powered windows and central locking via IR. Also, I plan to buid features like the car won't start if the doors are open e.t.c. Prepare for a diesel like no other...

              Andrew
              Mediabox Hardware Project
              Current Stage: A complete redesign, although not much happening right now!

              Mediabox Software Project
              Status: Writing Sync Software (still) and playing around with interface
              To do: Far too much!

              Comment


              • #8
                haha,
                well, your car aint that bad. I happen to like opels/vauxhall...there are the same right? I'm driving a proton wira here in Kuala Lumpur....its the persona in the UK....hehe.....and the build quality is horrible....hehe.....
                Anyway, tell me what u have in mind and i'll see whether i can help u out with the hardware side. What i can tell u now is that for a rev reading you will need a frequency to voltage IC and then u have to send the input to the serial or parallel port....i think you have to tap wires to the distributor for the frecuency readout. Your speed would have to be a calculation of your current rev and gear......i think its somewhere along that line....not too sure... but basically just tell me the whole list of ideas u have and we can work from there.....

                Im pretty sure there are more guys out there who are interested as well..and could u please tell me more about your power window and centrol locking setup?

                Paladin
                Sproggy Mk2.8 & shutdown controller
                Via C3 800 mini-Itx 256mb Ram, 15G notebook HDD

                Life is like a Proton. You never know what you will get, but sooner or later, something will go wrong coz its a Proton!

                Comment


                • #9
                  I'm on exams at the moment, but as soon as they are over (2 weeks) I'll be back on the project. I'm off to buy a haynes manual for the car which should tell me everything I need to know about the windows and possibly the central locking. Hopefully it will be some help on anything else computery though! Cheers.

                  Andrew

                  ps. yep - this car is the old style opel vectra.
                  Mediabox Hardware Project
                  Current Stage: A complete redesign, although not much happening right now!

                  Mediabox Software Project
                  Status: Writing Sync Software (still) and playing around with interface
                  To do: Far too much!

                  Comment


                  • #10
                    This may or may not be of interest to you

                    I ditched the idea in the end, due to the law in the UK, but some of the posts might be of relevance to you.

                    Rob
                    And you say people actually pay money for M$ Windows?
                    www.mp3mini.co.uk (Does what it says on the URL) www.openclassic.co.uk (The new car, with zero rust!) www.rob-web.co.uk (My other site)
                    Total re-design underway: on the whole progress is very slow as the car is taking up too much time :)

                    Comment


                    • #11
                      rob,
                      Thanks for the info, Its gonna take me a while to read it but i guess its gonna be a good read. Im curious to know why u ditched the idea though. The display you made were pretty cool but have u seen the ones on the Honda s2000? hehe...they are somewhat similar to the ones used in formula one and rally. At least i know it looks similar to the one available in the Sauber Petronas F1 car....coz one of my frens work with them.

                      So did your setup finally work or did you just stop somewhere along the line?

                      Andrew,
                      I think power windows shouldnt be a problem...coz its just a matter of controlling the motors via software! thats where my nighmare starts.....lol....central locking would be a different story. Also, could you tell me there's any Haynes manual for protons? Thanks and good luck in your exams.

                      Paladin
                      Sproggy Mk2.8 & shutdown controller
                      Via C3 800 mini-Itx 256mb Ram, 15G notebook HDD

                      Life is like a Proton. You never know what you will get, but sooner or later, something will go wrong coz its a Proton!

                      Comment


                      • #12
                        you guys want to check out this thread for how to control windows/door locks, etc.

                        http://www.mp3car.com/vbulletin/show...&threadid=8256
                        Debt as of 1/1/05: $34,354.48
                        Debt as of July 4, 2007: $0.00 explanation
                        I'M DEBT FREE!!
                        I'm now a reasonably successful gunblogger.

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                        • #13
                          thanks wizardpc...... Thats the idea i had earlier but it still comes back to my problem of programming it!! I cant program even to safe my own life! er...actually i can do a bit of C .. but i prefer soldering and creating cicuits though. You software is cool...but i was thinking of more toward controlling it with voice and stuff. Maybe using viavoice or something similar to voodo voice. That way it'll be more useful.
                          I guess i have to start learning how to do vb then

                          Paladin
                          Sproggy Mk2.8 & shutdown controller
                          Via C3 800 mini-Itx 256mb Ram, 15G notebook HDD

                          Life is like a Proton. You never know what you will get, but sooner or later, something will go wrong coz its a Proton!

                          Comment


                          • #14
                            If you use L&H Voice Express (and possibly some others...don't know), voice commands will work on my software
                            Debt as of 1/1/05: $34,354.48
                            Debt as of July 4, 2007: $0.00 explanation
                            I'M DEBT FREE!!
                            I'm now a reasonably successful gunblogger.

                            Comment


                            • #15
                              Wizardpc, Hmm...that sound preeetty interesting..... but first i have to get my grubby hands on the relay board

                              azzri
                              Sproggy Mk2.8 & shutdown controller
                              Via C3 800 mini-Itx 256mb Ram, 15G notebook HDD

                              Life is like a Proton. You never know what you will get, but sooner or later, something will go wrong coz its a Proton!

                              Comment

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