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Thread: Renault Megane II Eeepc install. Original HeadUnit (SPDIF sound future planning)

  1. #1
    Newbie burleanu's Avatar
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    Exclamation Renault Megane II Eeepc install. Original HeadUnit (SPDIF sound future planning)

    Hello to all CarPc fans!!!

    After a lot of time spent here on forum, reading what ever people had done in there car, I start to build my own one.

    I will try to summarize what I had made.

    First the idea came from another member of the forum that has a Megane, Cris.
    When I seen his set-up (on these forum) I definitely wanted to have a PC in my car. Of course I can’t get close to his set-up but I want to have as clean and simple as possible and more important on the smallest budget possible.
    In time I had seen people using eeepc as computer, and I start to make my studies. I can say it took one year until I start to build something.

    The support for the monitor I make it at my job, on a laser cutting machine. If someone wants I can give the DXF of it.
    The support that you see in pictures is not exactly the last version of it but the base idea is the same.
    By using this type of support I was able to keep original HU and like that I was able to have “alive” the display of HU, plus even the dim function for night is used because the LCD backlight of the monitor is using the same power supply (is LED Backlight).
    I just made on that support the important buttons of the unit and I connect then direct to the HU, after searching on the original face the wiring contacts.
    The On/C button has to functions. Inside of that I put two SMD push buttons; one is turning ON the HU and the other one the PC. So if I press on the left side of the button is the HU and if I press the right side is the PC. The “CE” button is doing “Cd Eject” and the blue ones are for sounds, traffic info and mode (I only have to change the label on them). For the moment they are not illuminated but if are not ok I will ad some LEDs in the back of them. They are coming from a small pocket calculator. The missing buttons for volume +/-, scan +/- and source are on the wheel control.

    The location of the pc is inside, behind the glove box, connected with screws to a reinforcing bar of the car. Inside there is a lot of space and is open air so I don’t think that I will have problem with pc overheat. I hope to not have some issues with the pc because every time I’ll have to take glove box out to reach it.

    The power supply for the pc is made with an LM138 Adjustable Voltage Regulator and is set at 9.75V, and is only active when the engine is started. The PC is having the original battery.

    For people ho want to extend the cable for monitor on eeepc (if is still any remaining) I only can say it took me 5 hours. The rest of the soldering went ok but that one was enough difficult. I had lost only the keyboard on the process on relocating connections because it break it self, the plug for it is extended OK but the keyboard is having now some lines inside broken. Until I find another one I use OSK from windows or an USB one. I’m planning also to buy a touch screen, but in the future.

    For the sound first I used the normal analog AUX input of the HU but afterward I had seen that people that like to mod the eeepc discovered that the sound processor of it is capable to give 5.1 sounds on analog and also the spdif digital, and from the guys ho have the HU version “tuner list” I discovered that the HU is capable to accept sound on spdif via a small PIC emulator, ho is fooling the HU that is connected to a CD Changer, so I will start to build that to have maximum quality on sound. For the moment I’m steel looking for the PIC.
    For "rounding" the sound inside car I ad also an amplifier for a subwoofer, and for that I used as a box the space from the spare wheel. I only lift the bottom of the trunk with about 5 cm and made a door on which I install the speaker and the amplifier. The spare wheel is still there in the original position. The total volume for the air is about 45-50 liters (I think), which is sufficient for the moment. The "box" is "sealed" but now I’m thinking if I need to ad some tubes to make it "vented".
    That’s about all my setup.
    I hope that I don’t miss something.

    So,
    This is my Harware:

    Eeepc 4g (second hand buy)
    Homemade DC-DC power supply for computer (LM138 Adjustable Voltage Regulator)
    Extended original monitor from eeepc
    Special support to hold the monitor
    Cygnet Bluetooth GPS (had remain from my old pocket pc)
    Stock HU (behind the monitor, working as suport too)
    Spdif connection thanks to tlcdcemu PIC emu version and eee-pc.ru mod spdif_701
    Magnat Ultra 2000 for woofer
    Special enclosure for woofer
    Front camera (original camera form pc) - will be connected soon
    Rear view (plan to buy usb camera with night vision)

    Feel free to ask anything regarding the install

    Regards to all,
    And a big THANKS to this forum and for all the info that is having inside.












































  2. #2
    Variable Bitrate
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    I LOVE the use of the calculator buttons! Very creative.
    2003 Lexus SC430 - Black with Ecru. VaisTech & NavTool with Centrafuse integrated into factory nav screen (hands-free Bluetooth, Voice Command, mp3's, videos, HD Radio, Sirius Sat. radio, DVD, Internet, & digital gauges (via OBD-II)), & LuxLink module.

  3. #3
    Tainted Love Cris's Avatar
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    Creative indeed! Looks really good Burleanu! Very clean! Congratulations!

  4. #4
    Newbie burleanu's Avatar
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    Thanks to all.
    Chris, coming from you it makes me very happy. You have all my respects. I only have to say that I got this "virus" from you, man, when I had seen first time you creation!

    Respectele mele Chris, venind din partea nu poate dacat sa ma bucure! Oricum pot zice ca de la tine am luat "virusul", cand ti-am vazut creatia.

    Cheers to all
    Thanks!

  5. #5
    Constant Bitrate Lincolnman's Avatar
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    Ingenious!
    Electronics work on magic smoke - don't let it out.

  6. #6
    Newbie mirciu's Avatar
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    super!! foarte ingenioasa instalarea, dar am si eu o nedumerire, cat de vizibil este ecranu. din amintiri bordul e oarecum inclinat in zona in care ai instalat ecranul si din experienta eeepcul nu are un unghi foarte bun de vedere!!
    in orice caz, bravo merita efortul

  7. #7
    Newbie burleanu's Avatar
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    Merci!
    Vizibilitatea ecranului este excelenta, exceptand momentele in care soarele bate direct pe ecran (rare cazuri, ce-i drept). Gandestete ca un eeepc are LED backlight, si acum merge alimentat direct de la ecranul default al masinii (ala de sus al casetofonului) si acolo in luminozitate maxima primeste 12V (13,6-14V mai exact) deci ledurile sunt aprinse la maxim maxim. Daca folosesti un eeepc inpreuna cu eeectrl setat la luminozitate maxima iti vei da seama, mai ales ca atunci tensiunea de alimentare ii in jur de 12V, oricum mai putin un pic si la mine atinge aproape 14 deci mult mai "bright". Poate ca ledurile vor avea viata ceva mai scurta, dar daca rezista car-pc-ul cat rezista ledurile sunt multumit.
    Ca sa iti faci o idee poti vedea in poza cu logo de xp, ca e facuta cam de la nivelul ochilor soferului cu blitz cu tot (ca era cam multa lumina ce intra prin parbriz, in partea de sus a cadrului, si ar da restul intunecat) , iar daca vezi in poza in care touch padul din departare este soare afara(se vede o raza de soare pe scaun) , si totusi ecranul se vede destul de bine.
    Deci pot spune ca sunt foarte multumit de vizibilitatea ecranului.
    IN poza in care apare ecranul intunecat este dat din reglajul de luminozitate al luminii bordului (deci implicit ecranul), este pt a arata ca e functional.

    ---------------------------------------------------

    For english readers sorry for long answer in romanian language.
    I'll summarize:
    I was asked by mirciu how visible is the screen.
    Explanation in short is so:
    On eeepc if you use eeectrl program you can set the brightness of the screen to more than is from original setting with almost 100% more and at that time is getting almost 12V at the entrance of LEDs for backlight, and with that setting on the screen is very nice. On mine because is connected to the build in display of the head-unit, when the engine on is almost 14V, even more bright (maybe shorter life on LED but...). The picture with less visibility on the screen is made on purpose to show that the adjustment of backlight is working (You can see also the letters of the radio info are less visible)
    So the answer is that is very visible and very satisfied with the visibility.

    Cheers!

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