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
    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
    Now that I think about it should I use the LPT port instead?
  3. beenthere

    Retired Moderator

    Apr 20, 2004
    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