Page 3 of 4 FirstFirst 1234 LastLast
Results 21 to 30 of 32

Thread: Controlling AC/Heater with computer

  1. #21
    Constant Bitrate
    Join Date
    Nov 2000
    Location
    VA , USA
    Posts
    193

    Post

    YES!! I love pain ;-) errr well on to the more serious side of this dicussion.

    DodgeCummins : about the fan speeds on my car (ford contour with almost the same A/C/heat control layout on the dash) it is a resistor for the blower speed (only reason I know is because there was a recall on it and if it blew it would only run at the highest speed) I will hopefully know more this weekend when I borrow michell's ? on demand from a friend (some sort of auto manuals on CD is all I know and since he wil loan it to me I will see if it has what I need in it) and as for me there is no way I can move them to an ash tray since my car does not have one :-) and I am not going to move them into the glovebox that would suck having to open up the glovebox everytime I want to adjust the temp/fan. I hope it is a lot easyer that you think it is dodge but if not I will just have to continue thinking about it and working on it for a longer time

  2. #22
    Newbie
    Join Date
    Mar 2001
    Location
    DDO
    Posts
    34

    Post

    Ok.. Here's a question.

    How do you plan on attaching a thermal diode (or anything like it) to your pc to read the temperature?


  3. #23
    Constant Bitrate
    Join Date
    Jun 2000
    Location
    Grand Rapids, MI
    Posts
    129

    Post

    NuBooJew,

    There are resisters called thermisters that will vary their resistance depending on the temperature. There are instructions on the Basic Stamp site for interfacing them to the stamp without much difficulty.

    You can get thermisters from Radio Shack for a few dollars or less.

  4. #24
    Newbie
    Join Date
    Mar 2001
    Location
    DDO
    Posts
    34

    Post

    Ok... I'm new to the world of Basic Stamps and I have a question.

    I know BASIC stamps are often used for parallel LCDs, so could one be used for both a parallel LCD (displaying both time and temperature) and connected to a pc telling it the temp? Or does the i/o circuitry prohibt it from performed to separate taks to separte ports impossible.

    ps.. Like I said I'm new to the concept, but I'm partial to dealing with Parallax (dealer in my area).. Which basic stamp should I look at?

    Thanks

  5. #25
    Constant Bitrate
    Join Date
    Nov 2000
    Location
    VA , USA
    Posts
    193

    Post

    ok A bit more info about the back of a ford control the I have them numbered
    1. The Fan Speed switch
    2. Output selection switch
    3. Temp control

    1. The Back of this hooks to 4 wires that are in the order of (love doing text graphics here if anybody needs better pics of what I am talking about just let me know and I will try to draw them up for you.
    1 4
    2 3

    2. This controls the output of the air and seems to be the most complex part of it. It has 4 wires on the top and then 6 air ? hose type things lower down.
    Wires
    1 2 3 4
    Hoses
    1 2
    3
    4 5
    6

    3. Well it has 3 wires running to the switch but I am not sure how to describe this one I guess I will have to get some real pics tommorrow so everybody can see what I am talking about.


    [This message has been edited by moxnix (edited 03-23-2001).]

  6. #26
    Low Bitrate
    Join Date
    Mar 2001
    Posts
    66

    Post

    moxnix,
    does you controller look like mine above? that is a ford.
    anyway, someone was saying that #3 (temp control) was a
    varable resistor which is what mine looks like and i think it only
    has 2 or 3 wires so that would make sense. I'll look closer at
    lunch, but i don;t think that i have all those hoses on #2 you
    were talking about. I have a little black box directly mounted
    behind the vent control switch and then wires coming out.

    -paul


    AIM: plaiming2
    YIM: plaiming

  7. #27
    Constant Bitrate
    Join Date
    Nov 2000
    Location
    VA , USA
    Posts
    193

    Post

    plaiming2 : mine has the tamp control and the vent control reversed from the pic up there (that is the reason my numbering is a little different from what you would have been based on my numbering mine is
    123 and yours is
    132
    I also went and ripped out my A/C controls so I could take pics and see if they helped anybody have ideas for mine and rather that clog the thread with all these pics I put up a little webpage with them and a little bit of a description and if I know anything about them I tryed to put that there also any comments on content are welcome (I know I have misspellings and bad grammer and who knows what else and the page looks like crap ) I will update the page with any more info I get about my controls and will also update this thread with it in the hopes that people can help me and this will somehow help others also.

  8. #28
    Newbie
    Join Date
    Feb 2001
    Location
    Fox Lake, Il
    Posts
    3

    Post

    moxnix,
    The hoses you are seeing are vacuum hoses from the engine. The knob switches the vacuum from a source to the vacuum operated valve that controls the appropriate door.
    You are right about the blower speeds though. In the different positions, current is sent through different resistors for the different speeds then to the motor. For hi speed, it is sent through a separate relay in most cases to control the high amount of current draw.
    Some cars that have more than 4 speeds are controlled by pwm and no resistors.
    I don't proclaim to know anything about f*rds though. This is all general automotive practices.
    Mitchell On Demand is a good program. I think the newer versions come out on 1 dvd.
    Alldata is another very good automotive manual type program.
    You guys might be able to order service manuals from http://www.helminc.com
    I know that you can at least get GM manuals from them. A word of caution though, all of these resouces are written with the technician in mind and they don't like to sell these manuals to the general public. HTH
    Mike

  9. #29
    Constant Bitrate
    Join Date
    Nov 2000
    Location
    VA , USA
    Posts
    193

    Post

    ok I have the wiring diagram from Mitchell On-Demand(all 13 cd's of it and for the temp control it shows that it is a Variable Resistor I will try to post some more info/diagrams sometime this weekend when I am at home and have some free time.

    The Fan speed is controled by the heater blower series resistor and from what I can tell from the diagram in fan speed order.
    Low = Pin 4
    M1 = Pin 3
    M2 = Pin 1
    Hi = Pin 2

    and the Hi seems to go straight to the blower motor the rest go to a different point on the resistor series (low goes thru the most as you would expect).

    for the output control I am still trying to figure out what the diagram is telling me about the wires for the most part and will post that as I figure it out.

    the tubes I have another diagram for the vacuum system and it goes something like this

    Red White
    Yellow
    Black Gray
    Gray

    Red tube goes to a different part of the same motor as the Yellow tube.
    Yellow tube goes to something labeled Defroster Door Vacuum Motor.
    White goes to A/C-Heater Inlet Door Vacuum Motor.
    Black goes to The Vacuum tank ? (it might just run behind it I dont know for sure yet)
    Blue goes to Heater Door Vacuum motor
    Gray goes to different of same motor as Blue

    Again I am still working on understanding these diagrams because this is not something I work on all the time (computer support is more my style) but it looks like V and NV would mean Vacuum and No Vacuum now I just need to figure out what all the other arrows and things mean.

  10. #30
    Low Bitrate
    Join Date
    Mar 2001
    Posts
    66

    Post

    hey mox,
    is it possible that you don't even have to
    worry about what the tubes do. maybe just by
    changing the voltages/relay of the wires
    that box does the right thing to the tubes.

    -paul

Page 3 of 4 FirstFirst 1234 LastLast

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •