Results 1 to 4 of 4

Thread: Anyone have a digital dash?

  1. #1
    Raw Wave shotgunefx's Avatar
    Join Date
    Apr 2005
    Location
    Boston, MA
    Posts
    1,800

    Anyone have a digital dash?

    Hi All,
    I'm new here, but have planning and gathering parts for my carpc for some time now. I'm looking to get some insight and opinions from people who've been down this road before. I've done some searching but haven't quite found the info I'm looking for. If I've missed it, my apologies.

    Here's the hardware I've got so far.

    8" lilliput VGA touchscreen.
    2 Endurastar J4K20 automotive drives. (One for core functions, one for music/etc)
    Traveler keyboard.
    Elmscan scantool.
    Savv backup cam.
    Memsic 2125 Dual-axis Accelerometer
    ...some other goodies

    Still need to aquire a GPS, was looking at a Holux.

    Pretty much the big holes left are what to actually use for a box and how to power it and networking

    I was thinking mini-itx, but not so sure. I'm not too concerned with accessibility, so it could be a 1/2 tower in the trunk (which is what I'm using now for playing around). Opus looks promising for the power supply. The mac-mini is interesting but I don't believe it has serial ports which is a problem. Plus I'd like to utilize both drives.

    For software, I'm pretty much set on linux. I'm thinking as far as the UI, I'm going to write my own as I've got some special requirements.

    The ultimate goal is to replace my gauges with an 8" lilliput touchscreen and a complete digital dashboard. Actually I'm going to leave the gauges in place hidden behind the touchscreen so I can avoid rewiring everything that passes through the instrument panel.

    I can get most of what I need via OBDII, but some of the signals I'm going to read directly (tach/speedo/etc) with a PIC and transmit it to the pc via serial. My car is ISO and I only get 3 or 4 samples a second which is way to slow for the tach and speedo.

    So one of my big problems is going to be getting boot time down. How does suspend to disk stack up? I've only ever used it on my win98 laptop which really never worked. It suspended fine, it's resuming that's problematic. I read an interesting article on IBM's developer works awhile back about using make to parrallize init that was interesting so I'm planning on giving that a try.

    As far as networking, I'd like to get a Bluetooth enabled phone that I could use as a modem. I was looking at the LG PM-325 from Sprint (my current provider), but I've had terrible luck in the past trying to get linux compatibility info from providers. Either it works when they say it doesn't or doesn't when they say it does. Anyone get this to work with linux?

    Any words of wisdom would be greatly appreciated.

    Thanks,
    -Lee

  2. #2
    Maximum Bitrate Mad Ad's Avatar
    Join Date
    Oct 2004
    Location
    Hertfordshire UK
    Posts
    533
    Quote Originally Posted by shotgunefx
    Hi All,
    I'm new here, but have planning and gathering parts for my carpc for some time now. I'm looking to get some insight and opinions from people who've been down this road before.
    Hmmm .... another carpc nut, im not sure if theres many of them about here these days

    I've done some searching but haven't quite found the info I'm looking for. If I've missed it, my apologies.
    Well you know the motto of this forum, and and then again.

    Here's the hardware I've got so far.

    8" lilliput VGA touchscreen.
    Ok, not a bad start

    2 Endurastar J4K20 automotive drives. (One for core functions, one for music/etc)
    Hell they must have cost a mint - 100G/11ms is pretty damn good, -20c good too ... just a shame that even both together you still only have 40Gb, and 4100RPM is slow as treacle .... most recommend a normal 3.5" HDD, do you live in antartica or work in death valley or something?

    Traveler keyboard.
    Elmscan scantool.
    Oh wait - this is a newbie forum, perhaps its a scanner to find some trees?

    Savv backup cam.
    Memsic 2125 Dual-axis Accelerometer
    Hey, that shts got more than two wires, your in deep now

    ...some other goodies
    a jelly belly bean dispenser?

    Still need to aquire a GPS, was looking at a Holux.
    could do worse- perhaps a bit of overkill but i can see a theme here

    Pretty much the big holes left are what to actually use for a box and how to power it and networking
    Phew, you slipped that 3 in 1 question in fast.

    I was thinking mini-itx, but not so sure. I'm not too concerned with accessibility, so it could be a 1/2 tower in the trunk (which is what I'm using now for playing around).
    Yeah, easy, slam it in a tower, box it in with some plywood and glue some carpet to it- noone will ever know.

    Opus looks promising for the power supply.
    Opus is the king of 12v dc/dc around these parts, closely (but no too closely) followed by the carnetix. The Opus 150W is about as far as you can go and has a far wider range of shutdown options than the 90w.

    The mac-mini is interesting but I don't believe it has serial ports which is a problem. Plus I'd like to utilize both drives.
    at 20Gb a drive yeah you need to.

    For software, I'm pretty much set on linux. I'm thinking as far as the UI, I'm going to write my own as I've got some special requirements.
    Well if your adept at it then all well and good, however you cant write everything yourself and youll cut yourself out of 95% of the help if you have problems with the few packages you can get to play nice together. Its up to you but perhaps dual boot an xp partition for all those custom apps that are floating about here.

    The ultimate goal is to replace my gauges with an 8" lilliput touchscreen and a complete digital dashboard. Actually I'm going to leave the gauges in place hidden behind the touchscreen so I can avoid rewiring everything that passes through the instrument panel.
    Thats a bit risky isnt it? Even with the best gear and running linux, I bet it will crash sometimes, then what do you do? Fit a hinge on the lilliput so if the worst happens at least you can see whats going on.

    I can get most of what I need via OBDII, but some of the signals I'm going to read directly (tach/speedo/etc) with a PIC and transmit it to the pc via serial. My car is ISO and I only get 3 or 4 samples a second which is way to slow for the tach and speedo.
    Burble burble burble Get your azz into the OBD forum, really you dont expect us to belive you are a newbie talking like that

    So one of my big problems is going to be getting boot time down. How does suspend to disk stack up? I've only ever used it on my win98 laptop which really never worked. It suspended fine, it's resuming that's problematic.
    You mean suspend to ram (takes a current to keep the ram in a constant state of refresh) or hibernate (dumps memory to disk and shuts down needing no current beyond usual usb and wol sense)? Both work fine in XP, I take it you are not intending to use W98 (I wouldnt) as you know its flakey.

    I read an interesting article on IBM's developer works awhile back about using make to parrallize init that was interesting so I'm planning on giving that a try.
    On Linux, W98 or XP? Most use things like XP lite to hack out what they dont need - as before, the more you look into specialised apps, the less and less people can help you.

    As far as networking, I'd like to get a Bluetooth enabled phone that I could use as a modem. I was looking at the LG PM-325 from Sprint (my current provider), but I've had terrible luck in the past trying to get linux compatibility info from providers. Either it works when they say it doesn't or doesn't when they say it does. Anyone get this to work with linux?
    Well there you go, you wanted linux ..... I mean I dislike the way the M$ monopoly throws its weight around but for sheer compatability in nonstandard applications like this, its nice not to have to worry wether the you have to troubleshoot the o/s for more weeks than it took you to get the hardware together. Anyway, have a look at the TD-SCDMA, not sure if its out yet but its using Trolltech's Qtopia, not sure how useful it will be for you but its a step in the right direction?

    Any words of wisdom would be greatly appreciated.
    Joking aside (hope you have a funnybone ) You are probably better off breaking your post down and taking it to the seperate forums - noobs tend to know a lot less about what they are doing than you do.

    Thanks,
    -Lee
    No problem

  3. #3
    Raw Wave shotgunefx's Avatar
    Join Date
    Apr 2005
    Location
    Boston, MA
    Posts
    1,800
    Thanks for the reply. I posted in Newbie section as I was new to here. Must be stupid today as when I read the forum description "more advanced topics may be moved to the respective forum below at the moderatorís discretion.", I was thinking it was some sort of "sandbox" for new people. Guess I need more sleep and to read the FAQ.

    Your right about splittling up the post, but it was meant as half question/half introduction. I was hoping someone might say "Check out so and so's ride".

    The drives, I got them for $60 bucks a piece new. I live in Boston, MA and I'll tell you, we had weeks of single digit temperatures this winter. How the lilliput will fare, not so sure.

    As far as safety, I've only got a speedo,tach,fuel and oil temperature from the factory. Nothing that would cause a major problem if it suddenly when out. I can estimate the first 3 quite easily. The way it's going to be setup, it will be a snap to reveal the gauges underneath, for the reasons you stated and inspection time.

    The IBM article was on speeding up 'nix. BTW.

  4. #4
    Raw Wave shotgunefx's Avatar
    Join Date
    Apr 2005
    Location
    Boston, MA
    Posts
    1,800
    I've heard VPW is pretty fast (20,30 a second?). I've got slow ISO so I've basically got to read the important stuff directly. Luckily, I got a hold of the tech's training manual for my car which has most of the signals/parameters. All just simple PCM signals.

    Look forward to seeing your pics when your done.

    Quote Originally Posted by joshthepilot
    I have a digital dash. I have a new trans am and created this:

    http://www.mp3car.com/vbulletin/showthread.php?t=45272

    And I say F OBD II.

    My choice of 8051 was the silabs 310 chip. This ports the data as serial data to a computer and serial data to a mini lcd panel (for the unlikely event of pc failure). It also listens to the serial 2 bus for information not retrieved by available signal lines. But this is only for VPW cars. The mini lcd panel can be replaced with a VFD panel and then I have a heads up display also. The small lcd shows digital information of important data. The chip stores the odometer since the instrument cluster used to.

    The cosmetics are not done yet so I am not posting pictures of what it looks like until thats done.

Similar Threads

  1. For those who want true 5.1 Dolby Digital and DTS
    By antimatter in forum Car Audio
    Replies: 89
    Last Post: 06-29-2007, 12:54 PM
  2. Digital WW in dash housing
    By vicky_obee in forum General Hardware Discussion
    Replies: 8
    Last Post: 03-29-2005, 04:01 PM
  3. Digital Dash Now Available
    By gnet in forum Software & Software Development
    Replies: 25
    Last Post: 10-29-2002, 09:29 AM
  4. A different digital dash.
    By MP3DUB in forum General Hardware Discussion
    Replies: 0
    Last Post: 04-05-2002, 10:55 PM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •