Is it safe to make a USB Fan?

Erlis D. November 19, 2012

I was thinking of creating this fan:

First I want to know if it harms the computer or causes any problem to it!

By the way, I’m creating this more for fun, and really think it’s cool!

  1. Anonymous
    December 1, 2012 at 5:03 am

    If your fan (or cooling pad for a notebook) draws too much power, you can get a USB hub which usually has an aux power input which can be connected. This is because USB will support many devices for data, but will only supply 500mA for DCV

  2. Abba Jee
    November 30, 2012 at 10:00 am

    seems got an idea from cooling pads :D

  3. Rakesh Mishra
    November 27, 2012 at 9:01 am

    it will not create problem just go for it

  4. Erlis D.
    November 23, 2012 at 10:46 pm

    Thanks everyone for your comments! I will try to create it, since I think it will be fun! I really appreciate your advices too! :D

  5. mohit kumar
    November 23, 2012 at 4:51 am

    It works fine.

  6. Aswin Kumar K P
    November 22, 2012 at 5:20 am

    seems intresting.But the output of the USB port will be around 5V.So have your fan around that voltage.

  7. Usman Mubashir
    November 20, 2012 at 10:23 pm

    Be sure to use a fan that does not eats up much power, it'll be fine,

    I didn't have any problem in my 1 year exp.

  8. Freud Iomc
    November 20, 2012 at 8:32 pm

    if you make it, it will blow... air.

  9. Imesh Chandrasiri
    November 20, 2012 at 5:59 pm

    yes! it's safe to make this fan! if the fan can get the needed power from the USB port, its safe!

  10. Ron Lister
    November 20, 2012 at 5:46 pm

    If the USB tries to draw to much power it should shut off the power to the port until it recognises that the devise has been removed. So I think it will be alright to try.

  11. Nikhil Chandak
    November 20, 2012 at 4:05 pm

    from my opinion - Yes !

  12. Jatin Rungta
    November 20, 2012 at 1:26 pm


  13. ha14
    November 20, 2012 at 11:37 am

    The average power of a USB port is about 5 volts. Your USB device will be able to draw out a maximum of 500 milliamperes (mA), but most default to 100 mA until prompted to provide more power by the device software. If your device requires more power than 500 mA, it may work slower or not at all while plugged into your computer.

    The USB 1.x and 2.0 specifications provide a 5 V supply on a single wire from which connected USB devices may draw power. The specification provides for no more than 5.25 V and no less than 4.75 V (5 V±5%) between the positive and negative bus power lines. For USB 3.0, the voltage supplied by low-powered hub ports is 4.45–5.25 V. A unit load is defined as 100 mA in USB 2.0, and 150 mA in USB 3.0. A device may draw a maximum of 5 unit loads (500 mA) from a port in USB 2.0; 6 (900 mA) in USB 3.0.

    be sure not to go against this rule.

    How To Make A Cheap USB Powered Fan

  14. Lisa Santika Onggrid
    November 20, 2012 at 10:05 am

    I have a USB fan, a bonus when I bought the computer. Not something I frequently use, but I think not harmful either. At least it keeps dust away.

  15. Alan Wade
    November 20, 2012 at 7:33 am

    Well just for giggles, I tried it and it worked fine! Not sure its something I would ever seriously use but it was good for a giggle.

  16. Douglas Mutay
    November 20, 2012 at 7:07 am

    There should not be a problem. go ahead

  17. Jim Chambers
    November 20, 2012 at 3:39 am

    Computer fans are 12V and 300-400mA. USB port supply is 5V and 500mA.

  18. Alex Perkins
    November 19, 2012 at 11:11 pm

    I would say yes as I have done this but put it into a wooden laptop stand just where my fan intake is.

  19. Vincent Mico
    November 19, 2012 at 11:02 pm

    Only if you have a decent motherboard (USB controller) design will detect the amount of current that a device is trying to draw from the USB bus and, if it is above the capability of the motherboard, the USB controller will shut off that device.

    The specification for USB voltage and current is indeed 5V and 500mA and any device you configure for connection to a USB 2.0 port should only operate within this range.

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