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Thread: 12 v 24 v ?

  1. 5th December 2010, 06:54 PM #1
    VladTepes's Avatar
    VladTepes
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    12 v 24 v ?

    I have some 24 V lights (should be low current draw as they are only x-mas type lights) that I want to run from a 12v car circuit.

    1. Why the hell don;t they use 12v liek everyone else (probably a rhetiorical Q that one).

    2) It seems stupid running an inverter to turn 12 v DC to 240 AC and then using the provided transformer to change back to 24V DC. Is there an easier way to convert 12V DC to 24V Dc ?

    Alternatively, anyone know where I can get 12 v xmas type lights taht could be run from a vehicle?

    Thanks

    P.S. It's a plan to keep Mrs Vlad happy... 'nuff said/
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  2. 5th December 2010, 08:46 PM #2
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    You got dual batteries?
    12 + 12 = 24
    Roger
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  3. 5th December 2010, 09:52 PM #3
    FFR
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    Hi,

    If current consumption is low, you can use a DC-DC converter like this one:

    DealExtreme: $11.81 Universal Car Adapter for Laptops

    I use it in a regular basis to power my laptop (19V) from the car battery.

    Beware:
    - it can get really hot if left covered
    - it produces lots of RFI interference, so if you have an HF radio onboard, you will notice a great increase in background noise level when plugging this device.
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  4. 5th December 2010, 10:18 PM #4
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    VladTepes
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    Quote Originally Posted by Xtreme View Post
    You got dual batteries?
    12 + 12 = 24
    Disconnect my car batteries and wire them in series ? No thanks.
    It's not broken. It's "Carbon Neutral".


    gone

    1993 Defender 110 ute "Doris"
    1994 Range Rover Vogue LSE "The Luxo-Barge"
    1994 Defender 130 HCPU "Rolly"
    1996 Discovery 1

    current

    1995 Defender 130 HCPU and Suzuki GSX1400

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  5. 10th January 2011, 03:38 PM #5
    VladTepes's Avatar
    VladTepes
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    anyone else ?
    It's not broken. It's "Carbon Neutral".


    gone

    1993 Defender 110 ute "Doris"
    1994 Range Rover Vogue LSE "The Luxo-Barge"
    1994 Defender 130 HCPU "Rolly"
    1996 Discovery 1

    current

    1995 Defender 130 HCPU and Suzuki GSX1400

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  6. 10th January 2011, 03:44 PM #6
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    maca
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    For a temporary solution:

    Get two small 12v SLA batteries from Jaycar and wire them in series to get 24v, then charge them during the day/night depending on when you want the Christmas lights to be on.

    Or for a more permanent solution Jaycar also supply dodgy little DC-DC converters that should do the trick, one example is AA-0264 ($28 wholesale).

    Please note, I am in no way associated with Jaycar, I just happened to have the Electus cattledog in front of me, that and the fact that RS/Farnell would be far more expensive.
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  7. 10th January 2011, 04:16 PM #7
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    101RRS
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    Here are some on ebay

    DC 12V to 24V 10A 240W Step-Up Power DC-DC Converter (eBay item 200557065610 end time 20-Jan-11 22:24:46 AEDST) : Industrial

    12V to 24V 3A DC-DC Power Converter Module (eBay item 190481362915 end time 17-Jan-11 15:30:47 AEDST) : Industrial

    DC 12V to 24V 5A 120W Step-Up Power DC-DC Converter (eBay item 400183740549 end time 26-Jan-11 17:54:40 AEDST) : Industrial

    DC to DC Converter 24V to 12V - ABR Sidewinder units (eBay item 390276686035 end time 11-Jan-11 22:27:38 AEDST) : Cars, Bikes, Boats
    REMLR 243

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  8. 10th January 2011, 06:27 PM #8
    lewy
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    get some solar powered lights if you want them for a campsite.
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