Computer in car

Background

I have a toyota corolla in 2003, from the factory only cassette recorders were installed on the official cars. Of course, I never put cassettes in the radio, I managed the radio and the fm modulator.
Not to say that I am particularly pretentious to music, but of course I wanted something more. What were the options:
1. Put the frame on 1 or 2 din and put the usual radio.
2. Buy for $ 70 native, on eBay but already with disks. But without mp3 :)
3. Buy for $ 600 cool, right under my car, with everything ...

But I didn’t particularly like one ...
1. ordinary radio tape recorders deprived of the on-board computer.
2. Sewed on soap :)
3. A little expensive and did not really like ...

So the decision came to put the computer in the car. Here is what happened BEFORE AND AFTER. Interesting? Welcome to habrakat =)
Before: After:

Main part

Immediately, of course, I did not rush to do everything, but for a rather long time I collected everything I needed :)

It turned out that 60% I already had or easily got from friends and relatives.

I will describe a little bundle - Of course it all started with the motherboard:

This is PCM-9386. The main advantage is passive cooling, and a very small size. But the processor is only 600 MHz. 512 MB memory
Price: all trophy, it was already before the start of the project.

As a data carrier, there is a flash drive KF 4gig; the system is on it, and a 40gig 2.5 hard drive.
Price: there was everything too.

Nutrition.
Small power supply from 12v. The car does not stand, not any converters for 220V maximum voltage of 12V.


Price: about 20 - $ 30 (I got it for free) :)

Sound
Of course, you can’t connect car speakers directly to your computer, you had to invent a sound scheme:
USB sound + power filter NEXT more audio filter (ground isolator :) NEXT Amplifier NEXT speakers.
There was no task to make a super sound, as I said before, I went with the fm modulator :) and the speakers remained native.

USB Sound 5.1

Price: $ 16 on eBay The
scarf really produces 5.1, but the car uses only stereo. The board was taken to grow and hopefully get rid of interference. By the way, interference is a separate topic - before installing it you don’t even think about it, but when you test it, you understand that it is tin, you hear everything: how the hard drive turns on and the campaign works, engine speed - generator.

I played for a long time with different filters, only this one

completely got rid of the interference: Price: $ 8 all the same :)
There are a lot of discussions on the Internet about this filter, or rather similar ones, that it distorts the sound, but I didn’t notice much distortion.

Amplifier:

Chinese miracle on 4 channels, and supposedly huge power. Instead of the head unit, it plays well, in my opinion ...
Price: 26 $ ebay

I bought a frame for 2 din.

Price: $ 15

The most expensive part is the monitor:

Price: $ 320
This is a monitor for the lazy. It is exactly under 2 din, with a dot-screen, 2 av inputs, automatic switching on (no need to turn on the handles each time), and automatic switching to the rear camera.

Also, a USB hub with external power was purchased.

Price: $ 19

And a wireless keyboard with a trackball.
I did not find the pictures.
Price: $ 40 like ...

USB GPS - already been, hid under a torpedo, it accepts normally.
USB to OBD2 - bought for $ 10 six months ago, reads sensor readings in real time and error codes.

A few more photos:

Installation process

A working system

We put Windu on the computer (the cat is not included in the package =)

View of the motherboard from above (see the CF memory card)

Put the driver on something ... =)

Conclusion

That's all. All sorts of buttons, wires, fuses, and other small things ...

The case for the motherboard was made of a case from a 16 port switch (iron box). The case is located right behind the monitor.
The amplifier is located in the glove compartment between the seats. To do this, I had to slightly reduce it ...
I put the shell for convenient control from the touchscreen.
What are the main functions implemented:
- Multimedia - music, clips, films ...
- GPS - costs iGo 8
- OBD - tracking vehicle parameters.
- Internet - you can follow where the car is located on Google maps, both from the car and from home.

Which will be implemented:
- Rear view camera (everything is ready to put, but I broke the camera)
- Video registration
- Monitoring tire pressure - while the devices for the campaign are expensive ~ $ 250, we'll wait a bit.
- Radio, yes no radio yet :) I bought a fm radio, but it doesn’t receive well.

Finally:

UPD: added some pictures :)
UPD2: The author of the idea - ivbar was invited to Habr, thanks to danin habrayuzer !