Current version of the OpenAuto Pro is 10
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Ford Crown Victoria Completed Install
#1
Finally got around to documenting the OpenAuto Pro Project for my 2000 Crown Victoria.

           

Video(s) of the project:



Parts involved in this build:
Raspberry Pi 7" Official Touchscreen - https://www.amazon.com/dp/B0153R2A9I/
Raspberry Pi 3b+ - https://www.amazon.com/gp/product/B07P4LSDYV/
12V 4 channel relay - https://www.amazon.com/dp/B00LW2GM84/
5V 1 channel relay - https://www.amazon.com/dp/B00LW15A4W/
12V - 5V 10amp buck converter - https://www.amazon.com/dp/B01M03288J/
USB sound card - https://www.amazon.com/dp/B016CU2PEU/
USB Bluetooth Dongle - https://www.amazon.com/dp/B07J5WFPXX/
Startech USB 3.0 4-Port Hub - https://www.amazon.com/dp/B004C3W25M/

The Crown Victoria stereo area was just a little bit too small for the 7" raspberry pi touchscreen, so I designed the screen mount to sit slightly proud of the opening. It then seemed natural to stack the relays & buck converter behind the pi. You can see my design for the mounts below:

       

The whole set up takes very little space, requires no modification to the dash, and installs like an aftermarket stereo. The (bulky) bezel of the raspberry pi touchscreen provides a clean look imho.

Here's a photo of everything installed and mounted behind the touchscreen. Please check the above video for a more complete breakdown. 

   

Everything is wired to use a 3 relay set up. I can't find the original post, but please credit to the author. I used this schematic:

   

Perhaps some of the more electrically inclined folks can let me know if I need a diode in that set up. I'm obviously using a 12v 4 channel relay (instead of two 12v relays) to keep things more compact. I also use one of the extra 12v relays to control illumination on the backlight.

It has been a fun project during lockdown! The final step is to re-print the mounts in ABS plastic. They're currently printed in PETG which melts quite easily in an enclosed vehicle during the summer (even in the shade). But to print ABS, I need an enclosure for the printer... and that's another project.

   

All the best,  -drivers.ed
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#2
(06-25-2020, 12:22 AM)driversed Wrote: The final step is to re-print the mounts in ABS plastic. They're currently printed in PETG which melts quite easily in an enclosed vehicle during the summer (even in the shade). But to print ABS, I need an enclosure for the printer... and that's another project.

Are you sure? I don't think so. I have printed a cover vor my tweeters in black PETG and the sit on the dashboard now for 2 years and are still OK. PLA is definitive not able to work in the car (I have learned my lesson) but I think PETG should work.
And you can also test ASA it's similar to ABS but easier to print. But I have no experience with ASA or ABS.
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#3
I also have a few PETG prints in my car and they are holding quite well. No deformation at all.
And summer in my country is pretty hot.
I did print some test parts in PLA and they didn't survive one single day left in the car on a sunny day.
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#4
(06-25-2020, 07:27 AM)Viper Wrote: Are you sure? I don't think so. I have printed a cover vor my tweeters in black PETG and the sit on the dashboard now for 2 years and are still OK. PLA is definitive not able to work in the car (I have learned my lesson) but I think PETG should work.
And you can also test ASA it's similar to ABS but easier  to print. But I have no experience with ASA or ABS.

(06-25-2020, 08:29 AM)Great Wrote: I also have a few PETG prints in my car and they are holding quite well. No deformation at all.
And summer in my country is pretty hot.
I did print some test parts in PLA and they didn't survive one single day lefted in the car in a sunny day.

Perhaps the PETG I'm using is inferior quality for handling the heat? It will hold up to it's own weight, but an external force acting on the parts will cause them to deform (in my video those melted parts were after 2-3 hours in a car on a day in the mid-90's).

I have 2 other brands of PETG I've not opened. I will give them a try next week. With temperatures currently topping 108F in the desert...

thanks -d
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#5
(06-25-2020, 04:22 PM)driversed Wrote: With temperatures currently topping 108F in the desert...

Ok that high temperatures are not so often in Germany but last year we have had also temps above 100F. But I think the intensity of the sun is much lower, so that the temp in the car ist lower too.

Maybe you should give ASA a try. I don't know if it will work without warping in an open encloser but I have heard that it is possible.
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#6
I have PETG stuff in my car for years with no issues, my phone mount is PETG and has not deformed through sevral summers. I think you must have some inferior PETG.
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#7
I'm doing the marauder in the other thread, our dashboards are the same.
The official touch screen looks good in that space! I assumed the it just wouldn't work from its size.
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#8
(06-27-2020, 02:10 AM)The Fat Bastid Wrote: I'm doing the marauder in the other thread, our dashboards are the same.
The official touch screen looks good in that space! I assumed the it just wouldn't work from its size.

I've seen your project in the other thread! Very nice -- and way more deluxe than my set up. If I had to do it again, I would've liked to try your route, using the shell from a busted radio. It just never occurred to me to try that. I do have a few aftermarket stereo install kits for our vehicles, but they are pretty flimsy.

Ultimately 3D printing everything is probably the way to go. I just need to follow Viper and TheBasedDoge's suggestion and try a different PETG. And I still want to get into printing ABS.

Oh - and very jealous of your Marauder! I am a big fan of the Panther Platform, and the Marauder has to be the crown jewel of these cars.
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#9
I finally did reprint my brackets in a different brand of PETG. It does seem to stand up to the heat better.

While I was installing the newly printed brackets, I documented the whole assembly of the headunit:



But I'm still afraid to subject it to a 108F day Smile  I've also built an enclosure for the 3d printer and am trying to print in ABS (Amazon Basics ABS), but I'm still having trouble with warping and weak prints. I hear good things about Hatchbox and eSUN ABS, so I might want to try that.
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#10
Nice clean setup. watching your video it looks like you're using a method that I introduced here. Three relay solution.

Im just wondering, does the rpi actually fully shutdown before 5V relay cuts all the power? Becouse rpi usb out is powering that relay, and I know for the fact that rpi cuts usb power before it is shut down completely. I had to use delay relay that was powered separately from rpi.
Raspberry Pi 4b-4gb / Official 7" touchscreen / OAP 5.0 / Honor 8x (AndroidAuto 5.) / USB sound card / USB microphone
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