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06-14-2004, 08:39 AM
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#1 |
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Member (10 bit)
Join Date: Aug 2003
Location: East Lansing, MI
Posts: 635
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Cold Cathode really cold?
I've built a few computers, and I've been looking at parts and wondering, Is a cold cathode thing, really cold. Is it an internal thing or does it actually help cool the computer.
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06-14-2004, 08:50 AM
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#2 |
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Member (5 bit)
Join Date: Jun 2004
Location: London UK
Posts: 19
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it wont cool your pc, ive just put a few in, not really giving much thought to temperatures, just gave em a feel and they arnt cold enough to cool things down.
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06-14-2004, 08:55 AM
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#3 |
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Wrench Bender
Join Date: Dec 2002
Location: Plymouth,MN
Posts: 5,949
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Cold cathode are basicly neon type lites. you will get a little extra heat from the ballist, but the lite will will be room temp to the touch.
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06-14-2004, 08:59 AM
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#4 |
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Member (10 bit)
Join Date: Aug 2003
Location: East Lansing, MI
Posts: 635
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Then why do they call them cold? Maybe its a psycological ?
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06-14-2004, 09:12 AM
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#5 |
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Got Privilege?
Join Date: Jun 2001
Location: IA go Hawks
Posts: 1,257
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Just as opposed to hot I believe
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06-14-2004, 01:09 PM
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#6 |
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Member (11 bit)
Join Date: May 2003
Location: Brooklyn, NY
Posts: 1,798
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I dont know exactaly why there called "cold" cathodes, but they do run cool for how mutch light they put out.
Also the normal case ones run at a bit over room temp, the thinner ones (like some used on fan grilles) actually run quite hot. |
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06-14-2004, 02:15 PM
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#7 |
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Member (6 bit)
Join Date: Jun 2004
Posts: 51
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maybe because they can just turn on, they dont need to "warm up" to get the color to work....Maybe?
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06-14-2004, 02:56 PM
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#8 |
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Member (10 bit)
Join Date: Jul 2003
Location: Corpus Christi, Tx
Posts: 667
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Actually I installed 2 of them in my cooler to keep my beer cold. Now I never have to buy ice.
Just kidding. -Spartan |
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06-14-2004, 03:00 PM
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#9 |
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Member (6 bit)
Join Date: Jun 2004
Posts: 51
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That would be awsome if they actually did cool pcs.....But not a snowball's chance in florida....
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06-14-2004, 03:12 PM
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#10 |
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Got Privilege?
Join Date: Jun 2001
Location: IA go Hawks
Posts: 1,257
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I found somewhat of a definition.
Cold Cathode does not require heating above ambient temperature to produce light. Lamps are phosphor coated to emit various color temperatures. Cold Cathode is a custom product which can be contoured to almost any shape, with the light output of Hot Cathode (Fluorescent), and approaches a permanent light source. |
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06-14-2004, 07:27 PM
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#11 |
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Member (6 bit)
Join Date: Jun 2004
Posts: 51
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So i was right? COOL!
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06-14-2004, 07:45 PM
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#12 |
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Member (7 bit)
Join Date: May 2004
Posts: 77
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Ya the guy who made them probally just thought to call it cold because almost any other light gets hot, so by comparison they are relatively cold.
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06-14-2004, 09:12 PM
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#13 |
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Member (6 bit)
Join Date: Jun 2004
Posts: 51
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no...Fudtone said the answer!
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06-15-2004, 02:07 PM
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#14 |
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Member (5 bit)
Join Date: Jun 2004
Location: England
Posts: 21
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its todo with the way they shine why they are called cold cathodes
 and how the gasses do not heat up when eleci is passed thorugh them
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06-15-2004, 04:33 PM
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#15 |
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Banned
Join Date: Jul 2000
Location: Bakersfield,CA
Posts: 7,761
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Fluorescent lamps have a small amount of Mercury or another substance that when the lamp is started a very large arc of electricity is fired between the Cathode and Anode which vaporizes the Mercury. This then becomes a conductive vapor which allows the electrons to excite the phosphor coating and generate light. The cathode in this case must remain hot in order to keep the vapor from returning to it cold state as a liquid or semi-solid.
Cold Catode Lamps use a varity of gases, such as neon and argon, which when subjected to the elctrical field between the cathode and anode, excite and give off a certain color of light. In both lamps the ballast generates a very large burst of electricity to creat the flow between the cathode and anode. |
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06-15-2004, 08:38 PM
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#16 |
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Gremlin Overlord
Join Date: Apr 2003
Location: Australia
Posts: 2,382
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Yup... bearing in mind that neon and argon are noble gases I believe, and therefore they are pretty stable
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06-16-2004, 05:33 AM
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#17 |
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Member (10 bit)
Join Date: Mar 2004
Location: Essex, UK
Posts: 982
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And getting really technical the ballast is actually a resonant circuit.
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