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Thread: Will This Work?

  1. #1
    Join Date
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    Tennant Creek, Aust
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    Default Will This Work?

    I picked up a couple of fans from a decommissioned piece of equipment at work, when I got home I saw they were 24v not 12v.





    Couple of weeks later I rescued this.





    The plan for the fans are to cut a hole in the back of both my mill and lathe where the circuit boards are and use the fans to cool the circuit boards.


    My shed get to 60°C plus in summer.

    Ratty 05/2004 -05/07/2010 COOPER 01/08/1998-31/01/2012

  2. #2
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    Default

    The fans may work well enough on 12v, if you have that available? (Maybe put a filter on the air intake as well) . Otherwise, check the voltage on the charger, its a bit hard to read but if it is for 24v lead acid, the terminal voltage especially under the very low load of the fan could be a bit high. Not really likely to result in smoke I think, but could be noisy with a short life...

    -russ

  3. #3
    Join Date
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    Default

    I have several 24v fans running on 12v for different purposes.
    Run a bit slower but very quiet. Run on 24v and they are noisy.

    Hooroo

    John

  4. #4
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    Default

    Worth trying this cheap board?

    Ebay item 311592258575

    Jordan

  5. #5
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    Default

    Just the other day I salvaged a 24v power supply from a discarded printer, maybe keep an eye out for old printers

  6. #6
    BobL is offline Member: Blue and white apron brigade
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    Default

    The battery charger is perhaps a bit of over kill.

    The fans are less than 1/2 A so something like a old laptop or printer power adapter 16-24V would cope quite easily and be better for the fans in the long run than running them on 12V.

    I have a 24V fans that I have run from an 18V wall wart (from an old power tool recharger) for many weeks without any problems. When I finally checked the V out of the Walmart its was something like 23V.

    BTW always check the voltage coming out of those adapters - some of them have as much as double the rated V. Only one has ever had less than the rated V.

  7. #7
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    Default

    A lot of reticulation timers use 24volt wall warts.(Linear transformers)
    Cheap and plentiful.
    I've become a tool of my tools.

  8. #8
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    Default

    Aren't they 24VAC?

  9. #9
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    Default

    Quote Originally Posted by steve.rsa View Post
    Aren't they 24VAC?

    Not according to the picture !
    They will run forever on 12 volts, but a bit slower.
    Best Regards:
    Baron J.

  10. #10
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    No. I meant the retic systems.

  11. #11
    BobL is offline Member: Blue and white apron brigade
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    Quote Originally Posted by steve.rsa View Post
    No. I meant the retic systems.
    Yep but basic rectification is pretty straightforward and cheap.

  12. #12
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    Quote Originally Posted by steve.rsa View Post
    No. I meant the retic systems.
    Sorry Steve, I thought that you were refering to the fans.
    Best Regards:
    Baron J.

  13. #13
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    Default

    No worries, I did a bit of research and it appears some of the fans are ac/dc compatible. Depending on if they are permanent magnet versions. Anyway, 12V dc is what most computer modders run their 24v fans at to keep the noise down.

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