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Need Help With Cold Cathodes

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  • Need Help With Cold Cathodes

    Didn't know where to post this, or even if this is the right site to post this on. But you all seem good with cars, So I was wondering, I have this cold cathode setup for my computer, and we all know that the comp and the car both use 12V, so can i just hardwire into my cig lighter?
    If so, I noticed that there was 2 wires going to it, i am guessing one is ground and the other +12.
    Any guides or help would be great, thx a lot.
    2009 Altima 2.5S CVT Dark Slate

  • #2
    if you connect it straight to the car its going to get 14+ volts when the car is running, not to mention voltage spikes and dips when you are starting the car. This *may* blow it up i dont know how resistant they would be to that kind of abuse
    Signature: [==||========] 20% complete

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    • #3
      Any way to protect it from getting more then 12?
      2009 Altima 2.5S CVT Dark Slate

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      • #4
        Originally posted by ClubFed11
        Any way to protect it from getting more then 12?
        Regulator.
        Have you looked in the FAQ yet?
        How about the Wiki?



        Under normal circumstances, a signature would go here.

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        • #5
          Are you trying to wire it in your computer? If so I have cold cathodes in my computer and they just plug into the power supply within' the computer. Why would you need to wire it to your cigarette lighter?
          Dak TruckPuter:

          Mac: - Researching and Awaiting Funds

          Changed to planning for a Mac Mini Trukputer...w3rd.

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          • #6
            I have one running off my car's 12v....it works fine for cold cathodes
            2001 Explorer
            Xenarc, Opus 90W, 120 GB HD, Bondo everywhere

            Sold the Explorer...got a 350z

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            • #7
              yeah, cold cathodes are just fine being hooked directly up to the car battery, i've had one on my sub box that's been hooked up like that for about 5-6 months now with no problems.
              2005 Dodge Magnum RT, Samsung Galaxy Tab install

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              • #8
                And you all have an inverter right?
                You don't just wire it directly to the batterie right?
                And no, I don't have a computer in my car.
                2009 Altima 2.5S CVT Dark Slate

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                • #9
                  Right. You keep the inverter that comes with the CCFL. You do not wire the tube directly to the battery. You can get away without a regulator. I don't know how long it will last, but trust me, they are a lot more resilient than they let you believe.

                  I have been trying to design a CCFL dimmer circuit, and have been treating one of my tubes quite badly. Ramping voltage, DC "sine" waves, intentionally spiking it to about 15 volts, all sorts of horrid things. I have it running under my desk right now, going from about 5 percent brightness to about 90 percent. Its really a cool effect, but it can give you seizures after a while....
                  2000 Subaru OBS

                  Dell P3 @ 900 Mhz
                  7" Lilliput TS w/DigitalWW in-dash mount
                  80GB External HD

                  I am Zero Bitrate....

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                  • #10
                    lol, thats great.
                    So I wire the inverter which is connected to the CC to the batterie?
                    Do you think I could just use the cig lighter? I don't really wanna go through the firewall and all that if I don't have too.
                    2009 Altima 2.5S CVT Dark Slate

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                    • #11
                      anybody?
                      2009 Altima 2.5S CVT Dark Slate

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                      • #12
                        Thats fine. To the cig lighter is fine as well.
                        2000 Subaru OBS

                        Dell P3 @ 900 Mhz
                        7" Lilliput TS w/DigitalWW in-dash mount
                        80GB External HD

                        I am Zero Bitrate....

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                        • #13
                          yea i have had 2 under the dash and 2 under my back seats for 2 years now and they survived the potholes and in my other car which i crashed into a 86 cady at 45mph which ripped my abs plastic bumper in half but the cold cathodes were still lit and are running in my Z24 today. Funny thing was when i hit the car my CD player didn't even skip but it does when i hit a speed bump

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                          • #14
                            HAHAH, thats pretty funny, Weird too.
                            So I should just go ahead and wire them to my batterie, cause i am pretty sure the cig lighter puts out +12 too.
                            2009 Altima 2.5S CVT Dark Slate

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                            • #15
                              I just started having problems with my cold cathodes. The control unit fried...I dont know why.
                              -Josh
                              1997 Mitsubishi Eclipse GSX
                              My URL: https://www.facebook.com/jagray85

                              XBOX: DarkerStars

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