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  1. #1
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    Adaptor to connect 12V fan to 12V battery

    I need to run a computer fan to create airflow for a smale scale charcoal burner.

    It needs to be battery powered so that I can use it in the garden.

    I have bought:

    This 12 V fan:
    http://www.amazon.co.uk/Evercool-15m.../dp/B004ZS82R6

    This battery:
    http://www.amazon.co.uk/HQ-Universal.../dp/B000W1V628

    This charger:
    http://www.amazon.co.uk/Plug-500mA-l.../dp/B000NVST72

    The fan has a 3 wire, 3 pin molex connector. The fly lead from the battery has crocodile clips (red and black) for the battery end, leading to a connector with two prongs. This connector is visible in the photo on amazon. I haven't been able to establish its technical name.

    Unfortunately, I am almost completely ignorant of electronics. Could anyone advise me how I might connect the fan to the battery? I have searched without success for a suitable adaptor.

    Any advice gratefully received.

    •   Alt23rd May 2013, 13:34

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  2. #2
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    FoxyRick's Avatar
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    Re: Adaptor to connect 12V fan to 12V battery

    On the fan, the three pins are Red = +12V, Black = Ground, Other Colour = Tachometer.

    You do not need to use the Tachometer output - it is used on a PC for measuring the fan speed. Ignore it. Just wire up so that the Red fan lead/pin connects to +12V (Battery +) and the Black connects to Ground (battery -)

    Personally, I would just cut the Molex connector off the fan leads and solder on some spade sockets that fit the battery.

    Note that the charger will give a much higher voltage than 12V (maybe 15V) so you should not run the fan from the charger. It might be OK but more likely will shorten the fan's life.
    If I helped you, press the 'Helped Me' button. Please do not PM me with questions, unless it is a personal matter.


    1 members found this post helpful.

    •   Alt23rd May 2013, 14:04

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  3. #3
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    Re: Adaptor to connect 12V fan to 12V battery

    Dear FoxyRick

    Thanks ever so much your advice, which I will follow. I really appreciate you taking the time to answer my query.



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