xbstw, the temperature control is the final piece to the puzzle I haven't figured out yet. At first I thought it would be easy, since the heat blend door is moved by a servo controlled by a logic board.
The logic board tells the motor how far to open the blend door based on a voltage input from the temperature dial. It's basically a rheostat (potentiometer) that sends 20 or so different voltage levels to the logic board.
Getting Fusion Brain to emulate the different voltage outputs is the final piece of the puzzle.
I am sorry for late reply, get too busy recently.
I am thinking about this too.
My original plan is to physically interface the HVAC control, using servos to turn the knobs, the solution turns out to be too bulky, since I need to preserve the HVAC assembly, mount the servos onto it, and hide them into the dash. Although I am pretty sure this plan would work, there not enough space.
Then the only way to go is to digitally control it, switches can be replaced by relays. For the potentiometer part, the only solution seems to be "Digitally controlled potentiometer", since it is not analog, if build one from scratch, the difficult part is how to program the IC that controls it. A good news is that phidgets seems making something that may be useful in this case.
Above are all the info I have about this, hope that helps.
I have decided to upgrade to Windows 7 Ultimate. It previously had Windows XP SP3. I figured it would make things easier.
Taking suggestions for what to name the van PC. Currently it's "Vanputer" which is a bit uncreative. I am thinking "Enterprise".
The next step is to install the rear view camera. That should be relatively painless. Being a conversion van with a high top, I have a really good perspective and two choices (plus a justification to put up a rear view camera).
- Put it on the high top part. The high top is made of fiberglass. The pro is easy drilling. The cons are it's irreversible (think big empty hole if you want to sell), and the high top angles upward, which will make the camera's angle awkward.
- Install it in the auxiliary brake light. I got an extra brake light out of a junk yard to test this out, and drilled a hole in the center with a step bit. It fits for the most part, but the brake light is curved so mounting it flush will be difficult. Possible con is tampering with the legality of the brake light, although I am uncertain if it's illegal or not. New conversion vans come like this. Here is a picture:
If I go with the brake light option, I'll have them replace the incandescent bulbs with LEDs.
How did the windows 7 install go? I would go with the brake light location. Then just stuff a few red LEDS in there, you will be fine and LED's will be much brighter than incandescent lamps.
The Windows 7 installation went beautifully. I don't know why I didn't do it sooner. And yes, I'll likely go with the brake light option. While I'm getting the camera installed, I'm going to talk to the installer on options for the vanputer. I am trying to do HVAC control through the vanputer which would free up some dash space. If that doesn't work, I'll probably relocate the HVAC to the overhead console like I've seen in some SUVs.
That is awesome! I thought about doing carputer installs in the past, but now that I have a conversion van (Named mine "Enterprise" as well... Fairly common for techie conversion van owners I suspect). I will start a thread about my project as well... Good luck! I will enjoy following your Savana project!
Update: The project is on hold while I return the unit to the manufacturer (blk02si) for some further modification/diagnostics.
It's looking good! Can't wait to see it finished.