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Thread: Replacing the dash cluster with a lcd screen

  1. #21
    turbo addict
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    Re: Replacing the dash cluster with a lcd screen

    Just did a measure of the the L body cluster face opening 12" by 5" and my 89 Ls 12' by 4 " openings . had a tought could rum 2 screens on the LS butted together in extended mode have gauges on one screen and MS streets with gps running in the second

  2. #22
    Moderator Turbo Mopar Staff Force Fed Mopar's Avatar
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    Re: Replacing the dash cluster with a lcd screen

    If you have really deep pockets...

    http://www.racepak.com/Components/Dash_Compare.php
    Rob M.
    '89 Turbo GTC

    2.5 TIII stroker, 568 w/ OBX and 3.77 FD

  3. #23
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    Re: Replacing the dash cluster with a lcd screen

    http://es.aliexpress.com/item/7-inch...306802429.html
    I thinking something like this
    or
    http://www.ebay.com/itm/HDMI-VGA-DVI...3D190997459712

    with a piece of smoked glass covering it
    Last edited by bakes; 06-23-2015 at 12:47 AM.

  4. #24
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    Re: Replacing the dash cluster with a lcd screen

    Well I'd go easy on the tint, many LCDs seem dim enough with the sun on them anyway.... though physical brightness control knob wouldn't be a bad idea since it'll be barely bright enough to read at midday to holy crap it's like staring into a searchlight at night.
    DD1: '02 T&C Ltd, 3.8 AWD. DD2: '15 Versa Note SV, replacing.. DDx: '14 Versa Note SV << freshly killded :( ....... Projects: '88 Voyager 3.0, Auto with shift kit, timing advance, walker sound FX muffler on 15" pumpers wrapped in 215/65/R15 H rated Nexens.... and a '95 phord escort wagon PnP head << Both may need to go :( ..... I like 3.0s ... so??? ... stop looking at me like I've got two heads!

  5. #25
    Visit www.boostbutton.com... Turbo Mopar Contributor ShelGame's Avatar
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    Re: Replacing the dash cluster with a lcd screen

    The later SBEC and SBECII's have a 'streaming' data function available. Basically, you build a table of data to send out the serial port, and once you enter the commands to start the stream, the values just keep going. It would be easy to add this function to the older ECU's and should cause no issues since the DRBII won't recognize that they have the function. You could use this stream to send data to your dash (or data logger).

    It also might be possible to move the data table to EEPROM (from ROM/FLASH) and make it editable on the fly...
    https://db.tt/SV7ONZpQ
    Rob Lloyd
    '89 Daytona C/S

    2.5 T1 Auto
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  6. #26
    Supporting Member Turbo Mopar Contributor
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    Re: Replacing the dash cluster with a lcd screen

    Quote Originally Posted by ShelGame View Post
    .... You could use this stream to send data to your dash (or data logger).

    It also might be possible to move the data table to EEPROM (from ROM/FLASH) and make it editable on the fly...
    would need some way to make sure the data stays in sync, i.e. be able to recover from a "lost" byte.
    89 Voyager LE, 2.5T2 - rest in peace
    87 Charger Shelby T2 (2.4 conversion in process)

  7. #27
    Visit www.boostbutton.com... Turbo Mopar Contributor ShelGame's Avatar
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    Re: Replacing the dash cluster with a lcd screen

    Quote Originally Posted by wowzer View Post
    would need some way to make sure the data stays in sync, i.e. be able to recover from a "lost" byte.
    I think it might already. The last byte in the stream is always FF. Not sure if its sent out or not, but it would make sense.

    I'll read up on the protocol some more.
    Last edited by ShelGame; 06-25-2015 at 09:25 AM.
    https://db.tt/SV7ONZpQ
    Rob Lloyd
    '89 Daytona C/S

    2.5 T1 Auto
    13.24 @ 100.5mph
    NHRA #3728 AF/S

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  8. #28
    ...if you know what I mean... Turbo Mopar Contributor csxtra's Avatar
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    Re: Replacing the dash cluster with a lcd screen

    Quote Originally Posted by acannell View Post
    You can probably nail this with just a meter. Draw the schematic, including pin numbers and wire colors. Post it here (phone snapshot fine). Double check your inverter connections are correct. Measure all the voltages in the circuit. Confirm the input and output voltages of the inverter are opposite (they should ALWAYS be opposite unless something is wrong).

    How many 7404 chips do you have? Where did you get them? Make sure its not getting warm to the touch, i.e. blown.

    Post up a pic of your circuit connections.

    I take it your whole setup is known working, known good, using your previous rs232/ttl setup..right? Try hooking it up that way and make sure everything still works.
    Asa, I'll try to dig out my prototype board and put together a schematic and/or take a picture, the problem is that I'm scrambling to get my car ready for SDAC, and this may have to wait until after SDAC is over. I do appreciate the help so far.

    Yes, the setup works fine with the previous RS232/ttl setup, I'm just looking to simplify.

    Thanks for the idea of using static voltages to test the 74LS04's gates, I've got 10 or so of them here, so I'm sure I'll be able to find at least one that successfully inverts.

    Quote Originally Posted by RoadWarrior222 View Post
    I think the drive current of an LS (Low power shottky) part is weak, however should trigger a logic high on 2V input so if you've got 5V tolerant incoming you should be good there, but I'm thinking you might need a good solid 50+mA to drive the comms and you might only be getting 5 or 10 outa that.
    Quote Originally Posted by RoadWarrior222 View Post
    but just a thought before you get another part, hook up all 5 gates in parallel for TX, and just the one for RX
    RW, You might be onto something here. I went back and looked at my notes from when I was trying to get it to work, and I was able to successfully receive values in low-speed mode with the LM Xmit signal inverted by the 74LS04 then into the Netduino RCV, but when I attempted to send the 12h to switch it to high-speed mode, I couldn't get it to work with the Netduino Xmit stepped up to 5V, inverted, then connected to the LM RCV.

    If I do get some time before SDAC to test this out, I'll try running 5 of the gates in parallel on the Netduino Xmit (after stepping up to 5V) and see if that works for sending the signal to the LM to switch speeds.

    Just in case, I found a lot of 10 7404Ns on ebay for cheap, so I'll try that option also.

    Thanks to both of you for the help...
    Warren Hall
    "My Name is Warren and my car is an alcoholic..."
    OVC - SDAC "Our Sh*t Rolls!"
    Cincinnati, OH
    87 CSX # 741
    317WHP - 380 WFt-Lbs (STD-5)
    12.460 @ 113.2 - Race Gas + Methanol Injection
    12.749 @ 109.84 - 91 octane + Methanol Injection (Still tuning...)
    "Illegitimi non carborundum."
    -General Joseph Stillwell
    TD Runlogger Page Has Moved...

  9. #29
    ...if you know what I mean... Turbo Mopar Contributor csxtra's Avatar
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    Re: Replacing the dash cluster with a lcd screen

    Quote Originally Posted by ShelGame View Post
    The later SBEC and SBECII's have a 'streaming' data function available. Basically, you build a table of data to send out the serial port, and once you enter the commands to start the stream, the values just keep going. It would be easy to add this function to the older ECU's and should cause no issues since the DRBII won't recognize that they have the function. You could use this stream to send data to your dash (or data logger).

    It also might be possible to move the data table to EEPROM (from ROM/FLASH) and make it editable on the fly...
    Rob,

    I would be VERY interested in this as a possible addition to the LM codebase (with the data table in the cal itself so it is editable). I have been trying to figure out how to get a higher data rate out of the LM, since it is limited to 7680 baud, and replacing/augmenting the DRBII/OTC "request/throw away the first byte/capture value" approach with a streaming approach would do just that. Not to mention it would simplify the logging code greatly, which would make it easier to do what the original poster is envisioning.
    Warren Hall
    "My Name is Warren and my car is an alcoholic..."
    OVC - SDAC "Our Sh*t Rolls!"
    Cincinnati, OH
    87 CSX # 741
    317WHP - 380 WFt-Lbs (STD-5)
    12.460 @ 113.2 - Race Gas + Methanol Injection
    12.749 @ 109.84 - 91 octane + Methanol Injection (Still tuning...)
    "Illegitimi non carborundum."
    -General Joseph Stillwell
    TD Runlogger Page Has Moved...

  10. #30
    Visit www.boostbutton.com... Turbo Mopar Contributor ShelGame's Avatar
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    Re: Replacing the dash cluster with a lcd screen

    This thread is similar to asa's from a few months back - http://www.turbo-mopar.com/forums/sh...ighlight=gauge
    https://db.tt/SV7ONZpQ
    Rob Lloyd
    '89 Daytona C/S

    2.5 T1 Auto
    13.24 @ 100.5mph
    NHRA #3728 AF/S

    boostbutton.com
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  11. #31
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    Re: Replacing the dash cluster with a lcd screen

    I just had to get started on this. Wen't out an bought an Arduino uno from radio shack and a quick starter kit with a breadboard and jumpers. I then ordered this: https://oceancontrols.com.au/KTA-259.html which supports up to 8 thermocouple inputs and also has a decent proto area where I can make some better connections for the analog inputs.

    I also have a 20x4 character LCD on its way that I am going to set up with a simple sensor value display.


    Ian Adams Function>Form 1990 shadow scrapped, too rusty:( 1991 Spirit R/T Scrapped, parts sold:( 1989 Turbo Caravan Daily beater with built-[I]ish [/I]​engine slowly evolving into weekend turbo beater.

  12. #32
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    Re: Replacing the dash cluster with a lcd screen

    I had the idea to do this myself a while ago, but didn't get past getting the arduino to talk to the LM i had on the bench before it blew up. I'm waiting to get my car back from the body shop so I can start tinkering again.

  13. #33
    Supporting Member Turbo Mopar Contributor
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    Re: Replacing the dash cluster with a lcd screen

    my microcontroller experience with the LM is that several voltages appear to be high impedance and the voltage dropped when interfacing to a Atmel ATMega (the chip used in Arduino) directly. i was a bit surprised but planning to use an op amp as a buffer next time.
    So my advice is to check your sensor voltages with and without the extra electronics attached with a DVM to be certain your addition does not affect the input to the ECU

  14. #34
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    Re: Replacing the dash cluster with a lcd screen

    I've had the idea bouncing around in my head to use two 7" TFT screens and a Raspberry PI. My main focus has been on getting things running mechanically first so its not high on my list.

  15. #35
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    Re: Replacing the dash cluster with a lcd screen

    Heh, that's where I get stuck on things like this, approx priority is mechanicals, bodywork, then deluxe rocket surgery upgrades...... annnnd... you usually see my cars running around in filler and primer, so that's as far as I get
    DD1: '02 T&C Ltd, 3.8 AWD. DD2: '15 Versa Note SV, replacing.. DDx: '14 Versa Note SV << freshly killded :( ....... Projects: '88 Voyager 3.0, Auto with shift kit, timing advance, walker sound FX muffler on 15" pumpers wrapped in 215/65/R15 H rated Nexens.... and a '95 phord escort wagon PnP head << Both may need to go :( ..... I like 3.0s ... so??? ... stop looking at me like I've got two heads!

  16. #36
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    Re: Replacing the dash cluster with a lcd screen



    Got most of the code done for the LCD and analog inputs, now to figure out the multiplexer and add the temp inputs.
    Ian Adams Function>Form 1990 shadow scrapped, too rusty:( 1991 Spirit R/T Scrapped, parts sold:( 1989 Turbo Caravan Daily beater with built-[I]ish [/I]​engine slowly evolving into weekend turbo beater.

  17. #37
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    Re: Replacing the dash cluster with a lcd screen

    Quote Originally Posted by shackwrrr View Post

    Got most of the code done for the LCD and analog inputs, now to figure out the multiplexer and add the temp inputs.
    Your enthusiasm and effort are chipping away at my anti-arduino sentiments. If you have a serial port on there its a hop skip and jump to talk to the chrysler ECU and get whatever data you want from it (or send to it).

  18. #38
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    Re: Replacing the dash cluster with a lcd screen

    Quote Originally Posted by acannell View Post
    Your enthusiasm and effort are chipping away at my anti-arduino sentiments. If you have a serial port on there its a hop skip and jump to talk to the chrysler ECU and get whatever data you want from it (or send to it).
    I go for the arduino due to being electrical component dumb for the most part. I'm also really bad at programming so the dumbed down C+ is good for me. It does have serial and many people have managed to interface with CAN-C and multiple other OBD protocols. For the time being though this is going on my 91 diesel truck so no computer to Leach info from.
    Ian Adams Function>Form 1990 shadow scrapped, too rusty:( 1991 Spirit R/T Scrapped, parts sold:( 1989 Turbo Caravan Daily beater with built-[I]ish [/I]​engine slowly evolving into weekend turbo beater.

  19. #39
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    Re: Replacing the dash cluster with a lcd screen

    whould this help work at all ??
    http://codeandlife.com/tags/serial/

  20. #40
    Boost, it's what's for dinner... Turbo Mopar Staff Aries_Turbo's Avatar
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    Re: Replacing the dash cluster with a lcd screen

    Subscribed......

    Quote Originally Posted by turbovanman
    This one is easy, I have myself to blame, I rush things, don't pay attention to gauges when I should, change to much stuff at once then expect miracles, the list is endless.

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