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CAT-5 buried, exposed to sun

Discussion in 'Electronic Design' started by Joerg, Feb 3, 2007.

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  1. MassiveProng

    MassiveProng Guest

    No. The division of Teledyne.
  2. qrk

    qrk Guest

    For a "temporary" outdoor suspended run of CAT-5 which has lasted 5
    years, I painted the jacket with white primer paint. This is located
    in Central Calif. Stuff I inspected after 2 years was still in good
    condition. Maybe primer paint, then a coating of latex.
  3. Jim Thompson

    Jim Thompson Guest

    Yep. Latex will even protect exposed PVC pipe from the Arizona sun.

    Hey, Mark! Doing anything interesting yet?

    ...Jim Thompson
  4. jasen

    jasen Guest

    the sheath gets brittle in sunlight, (you may want to cover the exposed
    parts with irrigation pipe.

    250mA, 24V shouldn't be a problem
    the stuff is rated to handle telephone ringing voltages and power over
    ethernet is a higher current.

  5. Joerg

    Joerg Guest

    Why is the old stuff always better than the new stuff? Come to think of
    it I might even have enough feet of the old stuff. When laying the new
    pipes this morning I figured out a shorter route.

    BTW, something bizarre happened: The purple primer for PVC that I had
    was 2-3 years old. It had completely lost its "purpleness". So I had to
    hop into the car and get some more at Ace. Unfortunately they didn't
    have the cable, said they'd probably have it when the dry season starts.
    Anyhow, the guy there had never seen purple primer turn clear, in decades.
  6. jasen

    jasen Guest

    over time? the stuff I used bonded instantly like warm chewiing gum. on
    the roll turns were separated by a layer of plastic

  7. Joerg

    Joerg Guest

    We have that stuff, too. But also tons of huge rock outcroppings. Oh
    well, at least the new pipes are in now. Next is that cable. The store
    had this new "Christy's" PVC cement, says on the can that it can be used
    in wet conditions which was nice because somehow gate valves never close
    better than 99.9%. But it sure was messy since it ain't clear but blue
    (!). For the valve install I had to turn into a contortion artist.
  8. Joerg

    Joerg Guest

    When the water main before our meter busted open they replaced it with
    PVC. That surprised me. What surprised me even more was that they left
    an 45-degree joint exposed and that shows a wee chocolate-color by now.
    Does that mean it's going lalaland? I grew up in an area where water
    lines were always metal (still are AFAIK), no plastics.

    Are you back to chips now or did you take a liking to discrete stuff again?
  9. Jim Thompson

    Jim Thompson Guest

    If it's not exhibiting roughness you can probably save it with a
    coating of latex.
    Metal lines in this "soil" go bye-bye... extreme salinity.
    Right now I'm doing a chip design and some patent infringement stuff.

    ...Jim Thompson
  10. MassiveProng

    MassiveProng Guest

    Put Bluetooth controllers on all the heads! :-] Control them from
    your Wireless G router/switch webpage!. :-]

    That's what they do out here at Legoland and the golf course. The
    guy drives a tractor around and hand controls the sprinkler head banks
    one set at a time. His handset looks like a warehouse inventory RFID
  11. MassiveProng

    MassiveProng Guest

    Make an 802.11G controller that can replace his 24V line.

    Replaceable battery OR Inductive wireless charger where the operator
    places the charging unit nearby every other week or so (as the
    reporting software declares). That would be COOL!
  12. Joerg

    Joerg Guest

    Nah, why not go all out and design a fuel-cell driven radio link and 24V
  13. MassiveProng

    MassiveProng Guest

    What the hell do you think I just said?

    802.11G allows you to add it to your existing wireless network, and
    that is easily controlled via simple software languages that are
    about. The PS and battery IS in the device, of course, but said
    battery requires recharging, hence my dual suggestion about doing so
    manually or designing an additional device for inductively charging

    Where did you get lost. Fuel cells are still a ways off. Solar
    arrays work, but not for lawn sprinkler heads. The inductive setup
    would work fine. All is buried, and the charger can even be a bot
    programmed to make its rounds to the heads for the purpose of charging
  14. MassiveProng

    MassiveProng Guest


    You can also, while the sprinkler heads are active, use a small
    inline turbine to charge the cells whenever the lawn is being
    sprinkled upon with negligible effect on the sprinkle adjustment.
  15. Depends on the climate! But that's the stuff all right.
  16. HEre at the local hardware chain, the cable they sell for sprinkler
    systems IS cat5, and they charge $10 for about 5meters. If you buy a
    box of cat5 it cost about 10c a metre.
  17. Rich Grise

    Rich Grise Guest

    Then laying a piece of PVC across the span, and painting it
    appropriately (i.e, to camouflage), seems to me to be almost a
    no-brainer. :)

    And get some lichen and moss to break up those rocks! ;-)

  18. Joerg

    Joerg Guest

    Really?? Wow. Out here they sell some heavy duty black cable with 4-5
    conductors in there, non-twisted. Are you sure? Is that Home Depot or Lowes?
  19. Joerg

    Joerg Guest

    Hey, it was meant as a joke :)

    Then, while you are on a long summer vacation the battery in there
    decides to take a dump, you come home and as you pull up the driveway
    your wife sees lots of wilted plants and screams ;-)

    Sure solar would work. You only need 24V/250mA per valve for about
    10-15min, or 30min on a drip system. And you only need that when it's
    hot out, meaning the sun is pelting the area. BTW they make special
    solenoids that just need a turn-on pulse and then hold. Requires a
    turn-off pulse as well but those are made for exactly that market,
    solar-powered irrigation. AFAIK they fit regular LawnGenie and similar
  20. Joerg

    Joerg Guest

    Hmm, Andy wrote that they sell CAT-5 as sprinkler valve cable (at a huge
    markup) in his neck of the woods.

    Yeah, I am not worried about that. In this case I'll use four wires for
    one solenoid contact and four for the other, mostly to avoid adding to
    much resistance because this is at the end of a tremendous (old) cable
    run. Thing is, the valve was not installed to code and this was a
    professional company that did that. Couldn't believe it.
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