Monitoring temps controlling relays from computer

Discussion in 'The Projects Forum' started by Dominick, Apr 20, 2009.

  1. Dominick

    Thread Starter Member

    Dec 6, 2008
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    I'm looking to build most of this myself.
    A. for experience and
    B. if successful implement it

    This is a 2 part project first part is I would like to Monitor water temps
    of a closed loop solar hot water system there will be a few pumps and
    a few valves including temp sensors through out the system.

    Part 2 is Monitoring 3 zones of air allowing me to open/shut zone valves
    to heat/cool what ever zone is calling for it.

    I know there are devices I can buy that will already do this for me
    but i'm more in it for the fun of building the system myself.

    I was thinking of using analog to digital converters over the RS-232
    not sure if I should use the RS-232 for relay switching tho and I do not know at this point how many input and out put channels I need just yet.
    And lastly the program that will control/Monitor it all with be labview.

    Thanks in advance and I hope I put this in the right part of the forum.
     
  2. Dominick

    Thread Starter Member

    Dec 6, 2008
    28
    0
    Now that I think about it should I use the LPT port instead?
     
  3. beenthere

    Retired Moderator

    Apr 20, 2004
    15,815
    282
    I might suggest you are getting a bit ahead of yourself. Think first of what temperature sensors to use, how many of them need to be switched to the A to D converter, what level of resolution will you need, and so on.

    If you are planning to use a stand-alone A to D converter, how will you synchronize the input switching, and how will the receiver know which sensor output is being sent?
     
  4. Dominick

    Thread Starter Member

    Dec 6, 2008
    28
    0
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