Dash-mounted Screen in R34 Skyline

[ZilverZilvia]

Hey, wassup. I was just curious, but in the R34 skyline, in the center of the dash there is the screen that has all the read-outs. I was just wonderin where does it get all the readings from (such as throttle position, boost pressure, oil temp ect.)? Does it get it from the cpu or from different sensors in the car? It also has the air/fuel ratios and the exhaust gas temperature as well as a nice diagram showing the g forces being experienced. Is the g-force meter built in???

[ZilverZilvia]

This is the screen im talking about
(to the left of the pic in the center of the dash that sais GT-R NISMO)

[sami]

Considering that the ECU needs to get the readings from sensors, that's where the display (computer) gets them as well.

All modern GT-R's (R32 to R34) have acceleration sensors because of ATTESSA, that is where the computer gets the g-forces. It's just a matter of calculating the readouts.

I'm building something similar to that computer, have almost all the hardware, just need to install them and write software for the sensors.

[ZilverZilvia]

Originally Posted by sami

Considering that the ECU needs to get the readings from sensors, that's where the display (computer) gets them as well.

All modern GT-R's (R32 to R34) have acceleration sensors because of ATTESSA, that is where the computer gets the g-forces. It's just a matter of calculating the readouts.

I'm building something similar to that computer, have almost all the hardware, just need to install them and write software for the sensors.

So does the display computer (the screen) get the readouts directly from the sensors or from the cpu (that gets it from the sensors)?
Could the display computer (and screen) be used on a car other than the skyline (if you can calibrate it for new sensors and create a new software) or would that be impossible?? I ask that because your building somethin similar, and the computer readouts look AWSOME!!!

[sami]

Originally Posted by ZilverZilvia

So does the display computer (the screen) get the readouts directly from the sensors or from the cpu (that gets it from the sensors)?
Could the display computer (and screen) be used on a car other than the skyline (if you can calibrate it for new sensors and create a new software) or would that be impossible?? I ask that because your building somethin similar, and the computer readouts look AWSOME!!!

I wouldn't use that equipment on anything else that where it was designed for. You have to look at it from the basics and how you would do it. The sensors give out a reading, for example 0-5v. You build an analog to digital (AD) converter and pass it to the computer. ECU is a sort of computer as well so it really depends on the design of the system how everything was implemented.

I bet it is something like this:

sensor output -> AD converter -> computer

computer
|->ECU
|->display

It could be that the ECU and the computer are one and the same. Impossible for me to say unless I could get my hands on the schematics.

[ZilverZilvia]

Originally Posted by sami

It could be that the ECU and the computer are one and the same. Impossible for me to say unless I could get my hands on the schematics.

OOO MAN!!!! That would have looked so nice in my 240sx lol

BUT, now this is going to be either a reely STUPID sugestion or a super bright 1 (i think im leaning toward the dumb 1 ), if you split all the sensor readings (or put in sensors from the skyline in addition to the ones already in the car if its not possible to split readings or if the readings are totally different, have 2 sensors for each} for 1 to go to the cpu to control the engine in my 240sx and the other to a analog to digital converter, then to the skyline cpu (which is not conected to any engine {if thats possible }) which in turn will give it to the screen (since it is either relying on the cpu or needs it for somethin{since i do not now anything about this watsoever})??? So the car would have 2 cpus (1 for the engine and the other 1 just interpreting the data then sendin to the screen) and mabe 2 sensors for everything. You know wat, i think im a genius!!!!{Mabey thats what my mom ment when she always sais that i am special}

[sami]

Look into these items, that would give you a start.

Computer: http://mini-itx.com/
Display: http://xenarc.com/
ADC: http://www.embedded.com/story/OEG20010418S0038

[ZilverZilvia]

Thanx sami. So...could i hook up that exact screen (from the r34 or any other skyline) to my cpu? LOL i must sound really stupid Does anyone know where i can get the skematics for it (so i can shut up)???

[GrahamM]

[flomastr]

Sami:

Thank you for giving me another link to put into my explorer/favorites/happy_geek folder.

much appreciated.