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Windows 7: [Q] Laptop cooler pad - DIY

17 Sep 2013   #1

Windows 7 Ultimate x86 build 7600 (XP, 98SE, 95, 3.11, DOS 7.10 on VM) + Ubuntu 10.04 LTS Lucid Lynx
 
 
[Q] Laptop cooler pad - DIY

Hi All,

I've been working on a low cost DIY laptop cooler pad and have completed it. Its just a rough one with a hard board and two 12v fans with a USB cable from an old mouse. The cost worked out to around $2

The fans work quite fine on 5v from the USB, but I was just wondering if there was any way of boosting the 5v output from the USB to 12v for the fans ?

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The black piece of plastic on the top left corner in the first picture does nothing right now, but was planning on a switch or a potentiometer later on.




My System SpecsSystem Spec
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18 Sep 2013   #2

Microsoft Community Contributor Award Recipient

Win 7 Pro 64-bit
 
 

Nice project. I like it!

I'm relying strictly on memory so there's a good possibility I'm wrong. But I think each USB port (2.0 and 3.0) is rated at 5V with an actual working voltage of around 4.5-4.7V. A 2.0 port is rated at 500mA per port while 3.0 has up to 900mA per port.

The only way I can think of to increase power to the fans is to use a Y-conector cable and plug into two ports or perhaps use a powered USB hub by itself or along with a Y-cable. But like I said, I could be totally wrong on this.
My System SpecsSystem Spec
18 Sep 2013   #3

Windows 7 Ultimate x86 build 7600 (XP, 98SE, 95, 3.11, DOS 7.10 on VM) + Ubuntu 10.04 LTS Lucid Lynx
 
 

Lee,

I'd forgotten about Y-cables . Those should do the trick, but would take up two USB ports
Will check that out today.

On the other hand, there are a few schematics on the net for boosting 5v to 12v, sacrificing the amperage, but I'm a total noob at electronics
My System SpecsSystem Spec
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18 Sep 2013   #4

Windows 7 Enterprise 32 bit; Windows 7 Professional 64Bit
 
 

The answer sadly is that a Y-cable will do nothing except to use up 2 ports. The spec for USB 2 ports is 5 volts @ 500ma max. You cannot make the voltage any higher. You would be increasing the available current-which does nothing to speed up the fans.
The best solutions are
1. 5 volt fans
2. a 12 volt @ 1 amp (or higher current) wall wart.
My System SpecsSystem Spec
18 Sep 2013   #5

Microsoft Community Contributor Award Recipient

Windows 7 Ultimate 64
 
 

I would go with the wall wart but the noise off these fans running wide open at 12volt is going to drive you out of the room.
My System SpecsSystem Spec
18 Sep 2013   #6

Win8/8.1,Win7-U64, Vista U64, uncounted Linux distor's
 
 

$7 shipped, three 5v fans with a single usb connector. Great on a hard surface but to flimsy for your lap. Does a good job of cooling and gives you a nice angle on the keyboard.
My System SpecsSystem Spec
18 Sep 2013   #7

Windows 7 Ultimate x86 build 7600 (XP, 98SE, 95, 3.11, DOS 7.10 on VM) + Ubuntu 10.04 LTS Lucid Lynx
 
 

Quote   Quote: Originally Posted by madcratebuilder View Post
$7 shipped, three 5v fans with a single usb connector. Great on a hard surface but to flimsy for your lap. Does a good job of cooling and gives you a nice angle on the keyboard.
Thanks for the link but I'll pass on that since this is a diy and also it costs thrice
Just checked it again, Shipping $15 to India
My System SpecsSystem Spec
19 Sep 2013   #8

Win8/8.1,Win7-U64, Vista U64, uncounted Linux distor's
 
 

Quote   Quote: Originally Posted by gladson1976 View Post
Quote   Quote: Originally Posted by madcratebuilder View Post
$7 shipped, three 5v fans with a single usb connector. Great on a hard surface but to flimsy for your lap. Does a good job of cooling and gives you a nice angle on the keyboard.
Thanks for the link but I'll pass on that since this is a diy and also it costs thrice
Just checked it again, Shipping $15 to India
That makes a big difference. I should have caught that you are in India. If you want to get full fan speed you could look for a wall wart that provides 12vdc, but then you are tethered to a wall plug.
My System SpecsSystem Spec
19 Sep 2013   #9

Windows 7 Ultimate x86 build 7600 (XP, 98SE, 95, 3.11, DOS 7.10 on VM) + Ubuntu 10.04 LTS Lucid Lynx
 
 

Guess I'll have to go with the wall wart to get full speed, or I might try a 9 volt battery
My System SpecsSystem Spec
21 Sep 2013   #10

Microsoft Community Contributor Award Recipient

Windows 7 Ultimate 64
 
 

Not to discount your project but just raising a laptop so it draws cool air helps a ton. See this little widget I bought and you can make. What I like about it is how it raises the screen up. I use this with another 23" led in a dual screen set up with wireless mouse and keyboard and it rocks.

Amazon.com: 3M Vertical Notebook Riser (LX550): Office Products

[Q] Laptop cooler pad - DIY-hpim1707.jpg


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