05-28-2020, 09:56 PM
(This post was last modified: 06-14-2020, 05:03 PM by The Fat Bastid.)
Hello all!
I'm working on a headunit + audio system for my 2003 mercury marauder.
It has the ford 'standard' 1.5 din radio.
Looks pretty close to double din, right? Almost. it can fit in the opening but you have to trim a little lip on the dashboard typically. Here is what it looks like with a standard double din in the dash.
So I'll be using an empty shell of a broken ford radio as the base of this build so it should just slide right...in theory.
Here is the system:
Let's dig into some parts:
radio shell, got a busted radio and took out all the guts.
3d printed a bezel for the radio to hold the screen.
a 7" 1024x600 capacitance touch screen. from buydisplay. This is the biggest I can go for the opening. The top and bottom of the screen will make a TIGHT fit into it. I need to make a power connection for it instead of using the supplied barrel jack.
Sourced the oem connectors from TE and made a little breakout pcb for them so it can connect to the stock system as needed, for things like steering wheel controls.
Built a obd2 scanner using the design from https://github.com/Spartelfant/ELM327-BT .This connects by bluetooth to the pi.
automotive turn on/off power system from https://www.tindie.com/products/picotouc...w-version/ . The pi can not just be powered off, also sometimes you want to leave it running for a bit, or if you quickly turn the car on and off, this handles all that.
A raspberry pi 4 4gb. the brain. One thing to note here is that it's usb3 port is actually much faster than it's sd slot. They JUST released the beta bios for usb boot so the plan is to get a m2 ssd, put it in an enclosure, and keep everything on there. (OS, Music, etc) it should see a substantial increase in performance.
https://allo.com/sparky/digione.html This is not a DAC but just a transport. It adds digital out, that is it. One problem here is that it plugs onto the pi's gpio pins, blocking them all even if it doesn't use them all. The power unit uses some of these pins. I may end up just soldiering the wire on the pin underneath, still thinking about it.
a minidsp c-dsp 8x12 https://www.minidsp.com/products/car-aud...c-dsp-8x12 this acts as the DSP and DAC to the amps and in turn the speakers.
And finally the 3 speaker amps (only one shown) which are 4x100 tpa3251 class D amps from http://www.3e-audio.com/ with a 3d printed case to house the amp, a trigger switch, boost converter, fuse.
Apologies for the lack of "up and running" photos. It did work after testing and set up.
Some parts that I still need to get are a gps and antenna, real time clock, bt dongle, mic, etc. One thing about this is that I want the headunit to contain everything I need. I do not plan to use my phone with it at all. Also not shown is the all the custom speaker work. My car came with just 4 6x8s and 1 6.5" sub but I am putting in 3 way component fronts, 2 way component rears, and the sub, a total of 11 channels. Custom work has to be done and that will be a hell of a lot of speaker wires running around!
wish me luck!
I'm working on a headunit + audio system for my 2003 mercury marauder.
It has the ford 'standard' 1.5 din radio.
Looks pretty close to double din, right? Almost. it can fit in the opening but you have to trim a little lip on the dashboard typically. Here is what it looks like with a standard double din in the dash.
So I'll be using an empty shell of a broken ford radio as the base of this build so it should just slide right...in theory.
Here is the system:
Let's dig into some parts:
radio shell, got a busted radio and took out all the guts.
3d printed a bezel for the radio to hold the screen.
a 7" 1024x600 capacitance touch screen. from buydisplay. This is the biggest I can go for the opening. The top and bottom of the screen will make a TIGHT fit into it. I need to make a power connection for it instead of using the supplied barrel jack.
Sourced the oem connectors from TE and made a little breakout pcb for them so it can connect to the stock system as needed, for things like steering wheel controls.
Built a obd2 scanner using the design from https://github.com/Spartelfant/ELM327-BT .This connects by bluetooth to the pi.
automotive turn on/off power system from https://www.tindie.com/products/picotouc...w-version/ . The pi can not just be powered off, also sometimes you want to leave it running for a bit, or if you quickly turn the car on and off, this handles all that.
A raspberry pi 4 4gb. the brain. One thing to note here is that it's usb3 port is actually much faster than it's sd slot. They JUST released the beta bios for usb boot so the plan is to get a m2 ssd, put it in an enclosure, and keep everything on there. (OS, Music, etc) it should see a substantial increase in performance.
https://allo.com/sparky/digione.html This is not a DAC but just a transport. It adds digital out, that is it. One problem here is that it plugs onto the pi's gpio pins, blocking them all even if it doesn't use them all. The power unit uses some of these pins. I may end up just soldiering the wire on the pin underneath, still thinking about it.
a minidsp c-dsp 8x12 https://www.minidsp.com/products/car-aud...c-dsp-8x12 this acts as the DSP and DAC to the amps and in turn the speakers.
And finally the 3 speaker amps (only one shown) which are 4x100 tpa3251 class D amps from http://www.3e-audio.com/ with a 3d printed case to house the amp, a trigger switch, boost converter, fuse.
Apologies for the lack of "up and running" photos. It did work after testing and set up.
Some parts that I still need to get are a gps and antenna, real time clock, bt dongle, mic, etc. One thing about this is that I want the headunit to contain everything I need. I do not plan to use my phone with it at all. Also not shown is the all the custom speaker work. My car came with just 4 6x8s and 1 6.5" sub but I am putting in 3 way component fronts, 2 way component rears, and the sub, a total of 11 channels. Custom work has to be done and that will be a hell of a lot of speaker wires running around!
wish me luck!