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Raspberry Pi - Carputer Build

Discussion in 'Audio & Video' started by JRS, Feb 12, 2022.

  1. Feb 12, 2022 at 8:56 AM
    #1
    JRS

    JRS [OP] New Member

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    Have a 2012 DCLB WT model and originally wanted to add a backup camera, nav, and hands-free. Things quickly snowballed. Searching shows that something like this hasn't been done on this forum so I'm letting you guys know of another HU option.

    Disclaimer - way more work than it looks. Much easier to use a suction cup with your phone or tablet.

    Open Auto Pro is a software for Raspberry Pi, not a new OS. You get all of the desired in-car features like Android Auto, Car Play, BT, OBD-II, etc., but you still have a full-fledged Linux distro with a ton of GPIOs. The hardware and software side are really up to you and what you want to make of it.

    Basic rundown of my setup:
    Since I was already this deep, I swapped the gauge cluster and HVAC LEDs to white and made the needles red. Nothing new there, but I'll echo everyone else, really gives ya the fizz.

    There are a lot of specifics I could get into, so if you have any questions, just let me know.
    20220212_093437.jpg

    20220211_221820.jpg

    20220208_212644.jpg

    20220211_210503.jpg

    20220211_212206.jpg
     
    vtl, Filthyphil, DesertRoads and 8 others like this.
  2. Feb 12, 2022 at 9:21 AM
    #2
    Tundra1D6

    Tundra1D6 Well that escalated quickly…

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    Care to share the bulb size and difficulty of changing out the ugly orange dash bulbs?
     
  3. Feb 12, 2022 at 10:23 AM
    #3
    JRS

    JRS [OP] New Member

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    The cluster and HVAC are easy. They are well designed snap-fit assemblies and the boards are big. These take SMD 3528s. Buy (100) packs on Amazon of whatever color(s) you want to go with. Using a chisel tip on the solder gun and a pair of tweezers, you heat up one side and pry it upwards. Heat the other side and lift off. I put a small dab of new solder onto the PCB pads and reapplied the new LEDs.

    The 4WD knob takes SMD 3014 and those are a pain in the ass because they're so small. Same process as above, but I found that pre-applying solder to the LED before applying to the board worked better. You'll burn through a bunch of these learning the technique. Fortunately, they also come in (100) packs. I had some additional practice when making the encoder light pipes since I used the 3014s on those as well.

    Haven't taken apart all of the other controls yet. From past posts it looks like they're 5mm diodes. Not currently planning on swapping those because they're mostly out of sight and I'm tired of working on this project for now.

    All of the above assumes you have an actual solder station. The cheap, garbage guns won't cut it here.

    20220210_181623.jpg
     
  4. Mar 1, 2022 at 9:20 PM
    #4
    SRPoor

    SRPoor New Member

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    Thanks for posting. This along with software like openpilot is exciting to see.
     
  5. Mar 4, 2022 at 6:07 AM
    #5
    JRS

    JRS [OP] New Member

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    Hadn't heard of that project before and it looks great. Has me picturing encoded motors all over to overcome the lack of TSS.
     
  6. Mar 4, 2022 at 8:12 AM
    #6
    FredB32

    FredB32 New Member

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    You missed my favorite part: I love the mic location to just above the steering wheel...it feels like that would be a good spot somewhat insulated from a lot of the potential cabin noises (vents, windows, etc.). Did you print the housing for that? What kind of mic is it?
     
  7. Mar 4, 2022 at 8:16 AM
    #7
    NoRcptn

    NoRcptn Better than mediocre poster

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    Geezus. And I was worried about installing my drivers side grab handle. Your setup looks badass.
     
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  8. Mar 4, 2022 at 8:19 AM
    #8
    JRS

    JRS [OP] New Member

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    That's exactly why I put it there, and the fact that there is a removable insert on top of the steering column shroud which gives a clean wire pass-through. It's a cheap lavalier mic from Amazon. Took a few iterations to get the print to function correctly. Here's a CAD shot to give you an idea:
    mic.jpg
     
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  9. Mar 4, 2022 at 8:23 AM
    #9
    FredB32

    FredB32 New Member

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    Very nice. So, does the housing actually clip in place there with the tabs on the bottom? I'll have to take a look at mine later today, it might be something to consider.

    What is the reasoning for the holes in the side of the housing?
     
  10. Mar 4, 2022 at 8:28 AM
    #10
    JRS

    JRS [OP] New Member

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    If you take yours out you'll understand the clips and shroud base. This is now easy to squeeze and remove but stays locked in. Lavalier mics are omnidirectional. Side ports are for the radial mics. Not sure if they're necessary but my thought was if my wife was with we could both be talking even though she's in the passenger seat.
     
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  11. Mar 4, 2022 at 8:33 AM
    #11
    FredB32

    FredB32 New Member

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    Ah...makes sense. I'll have to take a peek at my mic (Kenwood that came with the HU). I didn't notice anything other than the obvious input on the front...but I honestly haven't looked that closely!
     
  12. Mar 27, 2022 at 8:47 AM
    #12
    Yzed608

    Yzed608 New Member

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    Awesome project! Way more ambitious than I'd ever be for something like this, just wanted to give you props for figuring all of it out.
     
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  13. Mar 28, 2022 at 8:31 AM
    #13
    JRS

    JRS [OP] New Member

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  14. Mar 28, 2022 at 8:51 AM
    #14
    tinman10101

    tinman10101 Ah cha cha cha

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    mad props john to your ambitious undertaking brother!
     
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  15. Mar 28, 2022 at 9:01 AM
    #15
    e30cabrio

    e30cabrio I'm e30cabrio, I'm a modaholic

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    Sequoia LED Headlights! D.T. L.T. headers, dual exh., BDX, S&B intake, 2018 seat skins.
    Wow! Amazing congratulations!
     
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  16. Aug 24, 2022 at 4:51 PM
    #16
    JRS

    JRS [OP] New Member

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    *All of this work makes you better appreciate the features of newer vehicles*

    V02 is finally underway. The hand soldered proto-board couldn't quite survive in the cabin as a short eventually happened and the buttons'/encoders' illumination went down. Also, V01 was so big and clunky that it was nearly impossible to fit within the double DIN and dash 'pocket.' It served its purpose to show what was possible and how it needed to be improved. V02 will have a machined PCB with a miniaturized layout. This should make everything easy to access and way more robust. It'll still use the 7" touch screen and currently printed bezel. Couple things which are changing:
    • Going to try Open Dash in hopes of ditching Open Auto Pro
    • Make the backup cam automatic with reverse gear as well as the anytime button (this turned out to be extremely beneficial)
    • Implement the option for software control of the eventual front and rear auxiliary lighting (for instance - turn the front aux on with highs and turn rear aux on with reverse gear)
    • Make this board be a carrier for the dual channel CAN card with the four channel DPST relay built-in so wiring is easier
    You can check out the CAD, mock of PCB, and schematic. Already planning V03, but assuming this one works well, it'll be quite a while before I get started on it.

    schematic_v02.jpg

    pcb_v02.jpg

    cad_v02.jpg
     
  17. Aug 24, 2022 at 4:56 PM
    #17
    e30cabrio

    e30cabrio I'm e30cabrio, I'm a modaholic

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  18. Sep 2, 2022 at 6:23 PM
    #18
    JRS

    JRS [OP] New Member

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    Made the board...and it didn't work. Learned an important lesson: hand soldered components NEED thermal relief around their pads. Redid the layout with some optimization and copper pours. Currently making this next rev.

    20220829_201847.jpg

    20220829_201912.jpg

    20220902_layout.jpg
     
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  19. Sep 2, 2022 at 6:35 PM
    #19
    ACDC2ZZTop

    ACDC2ZZTop Rock n Roll!

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    All cosmetic so far see my posts in 2nd gen Black out chrome in progress….
    Can you give more specifics on the cluster gauge swap.. not a fan of the orange myself
     
  20. Sep 2, 2022 at 6:48 PM
    #20
    JRS

    JRS [OP] New Member

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    There's another thread here about putting in the Optitron gauges if that's what you're asking. I used my original cluster and swapped the LEDs. Post #3 was my summary on needed components and general how-to. Hope that helps.
     
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  21. Sep 2, 2022 at 6:49 PM
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    texasrho83

    texasrho83 DGAF#1

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    Oof.

    You'll get it man! Too damn cool.
     
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  22. Sep 7, 2022 at 8:26 PM
    #22
    JRS

    JRS [OP] New Member

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    Dang near artwork.

    Another lesson learned: follow the instructions on the side of the bottle. Electroless tin plating really needs 7+mins. Had to take everything off of this board because the solder still wouldn't suck down. Super relieved to say this board is working exactly as it should. Next up is swapping software.

    20220905_230346.jpg

    20220905_163609.jpg
     
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  23. Sep 7, 2022 at 8:52 PM
    #23
    texasrho83

    texasrho83 DGAF#1

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    Is that a stick of RAM I see?
     
  24. Sep 7, 2022 at 9:10 PM
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    JRS

    JRS [OP] New Member

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  25. Sep 7, 2022 at 9:33 PM
    #25
    texasrho83

    texasrho83 DGAF#1

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  26. Sep 7, 2022 at 9:45 PM
    #26
    JRS

    JRS [OP] New Member

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    Smallest I could get - 128GB. Really just wanted those fast IO speeds. At that time I didn't have the quad DPST relay IC, so was a bit hellbent on improving boot time (it didn't improve it).

    Also, I don't store anything locally on any device. All files/media live on the NAS. If out, I grab through VPN/Plex, or we'll just stream.
     
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