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Neon Sign Power Supply: What's the Use?

Discussion in 'Electronic Repair' started by Beloved Leader, May 26, 2007.

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  1. A local shop has a neon sign in the trash. It fell, and the tube
    broke. I suppose the power supply is good. The specs are on the power
    supply: 7000-8000 volts output. I can't think of any use for it, and
    it's not as if I have room for any more junk.

    Is there any reason I should grab it?
     
  2. ian field

    ian field Guest

    Rig up a pair of wire meshes to the 8kV with a blue florescent tube behind =
    high powered insectecutor.
     
  3. Meat Plow

    Meat Plow Guest

    Great for torture using a couple jumper cables.


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  4. hr(bob)

    hr(bob) Guest

    Google on "Jacob's Ladder". They are a great use for old neon
    transformers.

    H. R. (Bob) Hofmann
     
  5. ian field

    ian field Guest

    Wired to the letterbox stops bills & junkmail.
     
  6. Jacob's Ladder, Tesla Coil driver, and CO2 laser power supply, to name 3 uses.

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  7. James Sweet

    James Sweet Guest

    Well you can get $20-$50 on ebay for it if nothing else. Neon transformers
    are great fun to play with, current limited high voltage, 8KV is enough for
    a classic Jacob's Ladder, those are always cool. You can also experiment
    with making crude discharge lamps and any number of other things. Grab it.
     

  8. That will get you room an board at the big house.


    --
    Service to my country? Been there, Done that, and I've got my DD214 to
    prove it.
    Member of DAV #85.

    Michael A. Terrell
    Central Florida
     
  9. Exactly the right voltage for a home electric chair - and more than enough
    amps.
     
  10. James Sweet

    James Sweet Guest

    Nowhere near, most NST are good for 20-30mA and by their nature are current
    limited, potentially dangerous, but not automatically lethal. Microwave oven
    transformers on the other hand are another thing entirely. Safety is
    important, and any high voltage should be respected and used carefully, but
    overblown dire warnings accomplish nothing. I was playing with NSTs by the
    time I was 10 years old, I've made it this far.
     
  11. Meat Plow

    Meat Plow Guest

    So it can't kill then?

    --
    #1 Offishul Ruiner of Usenet, March 2007
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  12. If you have certain medical conditions, or someone hits you over the
    head with it. it takes about 15 ma through the heart to stop it.
    Unless you are holding both terminals when someone turns it on, its
    unlikely that you'll grab the second terminal. You are more likely to be
    injured trying to get away from it.


    --
    Service to my country? Been there, Done that, and I've got my DD214 to
    prove it.
    Member of DAV #85.

    Michael A. Terrell
    Central Florida
     
  13. Many years ago we had one in the lab that we were using in an ozone
    generator.
    One lunch time, being more madcap than usual, we tried to drive it with an
    amplified audio source to seee if we could actually produce a spark gap
    transmitter.



    Charlie
     
  14. bz

    bz Guest

    A true statement but.... 15 mA is enough to 'freeze on' to a current
    source.

    That can EASILY happen with 110 VAC, harder with 8 KV. More likely to throw
    you across the room.

    On the other hand 15 uA across the heart region is sufficient to induce
    ventricular fibrillation (uncoordinated quivering of the heart) which WILL
    be fatal if CPR and/or defibrillation is not administered within very few
    minutes.




    --
    bz 73 de N5BZ k

    please pardon my infinite ignorance, the set-of-things-I-do-not-know is an
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    remove ch100-5 to avoid spam trap
     
  15. hr(bob)

    hr(bob) Guest

    Aha!! That might explain a lot of things about you. <G>


    BOb HOfmann
     
  16. James Sweet

    James Sweet Guest

    I'd never say *can't* in that context, but it's *unlikely* to kill you. That
    said, you still need to treat it with respect, getting bit by a NST will
    definitely hurt, likely cause a significant burn, and you may will rip your
    hand open jerking away or crack your head on the floor when you fall. It
    will probably not *kill* you, but it won't be pleasant by any means.
     
  17. Stan

    Stan Guest

    }A local shop has a neon sign in the trash.
    }...
    }Is there any reason I should grab it?

    1: if you have several MILES of electric fence and you really want those
    uppity cows to know exactly who is boss...

    2: you can conduct your own experiment with lightning flashes and
    primordial soup, looking for pre-historic amino acids

    3: many years back an acquaintance had a billing disagreement with the
    local baby Bell (US Worst, if you have to know). In the midst of this,
    Worst decided to show him who had the upper hand by disconnecting his
    service.

    He figured that since he didn't need the phone lines (being disconnected),
    they would make a perfect test bed for an experiment he had been pondering
    for quite some time. To wit, how many volts do you need to induce
    "cross-talk" between line pairs from a house to the CO?

    He waited till 3am (to decrease the chance of a nasty surprise to any
    neighbors) then he ran his high voltage (non-current-limited) XFMR to his
    phone line (having dis-connected it from his house wiring and
    dis-connected the anti-lighting stuff) and plugged it in. The house
    lights dimmed a bit for about 30 seconds, then came back full. To be
    thorough, he then grounded on side of the secondary and ran both sides of
    the phone line to the hot side of the secondary and re-powered for 30
    seconds.

    The phone company had several trucks in the neighborhood the next
    day...some of the repairmen were asking residents if they saw where the
    lightning had hit.

    He did this a few more nights before he got bored and payed his bill,
    figuring it had cost Worst more than it had cost him.

    Stan.
     

  18. What an ass. Someone could have died because he blew out a lot of
    people's phone service. BTW, that was a criminal act that would have
    put him in jail for sevral years.


    --
    Service to my country? Been there, Done that, and I've got my DD214 to
    prove it.
    Member of DAV #85.

    Michael A. Terrell
    Central Florida
     
  19. ian field

    ian field Guest

    I've heard the cells are actually quite small and cramped.
     
  20. ian field

    ian field Guest

    That's why it should be used on someone else!
     
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