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look at my home-made XPS 2 lappie cooler!!! - Page 6

post #101 of 157
10/5/06 at 11:28am
What is that connector at the end of the usb cable? What cables did you use?


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post #102 of 157
10/5/06 at 1:00pm
Thread Starter 
Quote:
So whould it be possible to connect the yellow cable (i beleave the data cable) of the fan to the data cable of the USB?
Well, no.
If you have a rotational signal coming from the fans then you will lose that, there is no way of monitoring that.
Only if you're a bit of a programmer could you possibly figure something out, but not like this. The USB port only functions as a power supply.

The connector I use is a simple run-of-the-mill connector you can get at any Radio-shack type store. It's just like any standard variable adapter power supply, one of those things where you can select the voltage.
This way I could use the USB port when I travel, or hook up the 12V adapter when I'm home, for extra power (at 12V the fans work a lot better than at 5V).

Note that for the purpose of this lappy cooler (elevation of the lappy and ventilation of the bottom) you don't need 12V. 5V is enough and you will feel the difference between a small breeze of air on the bottom of your lappy or baking it on the pillow...
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post #103 of 157
10/5/06 at 2:12pm
How did you connect all those fans to one cable? did you link the black and red together to make one circuit? (that is what my friend suggested)
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post #104 of 157
10/5/06 at 2:29pm
Thread Starter 
Like I said, I just bunched up all the red wires into one of these



and connected it to the + area in the USB connector, ask an electrician if you don't know how.
Do the same for the black wires.

As far as linking stuff together to form one circuit, I have no clue what you mean but it sounds like you'll smoke your lappy soon.

Really, if you don't get all that I said then you should not attempt it.
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post #105 of 157
10/5/06 at 2:37pm
Quote:
Originally Posted by tijgert
Well, no.
If you have a rotational signal coming from the fans then you will lose that, there is no way of monitoring that.
Only if you're a bit of a programmer could you possibly figure something out, but not like this. The USB port only functions as a power supply.
But cant i use the Data + pin on the USB and connect that to the yellow cable on the fan?(because i wanted to be able to use fan control slot)

Black would go to #4 on USB.. Red would go to #1 on USB so wouldn't yellow go to data + or data - ?

also.. did you have to modify the cables you have to get USB on one end and that weird circle port on the other?

what type of cable or connector was that?
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post #106 of 157
10/5/06 at 2:54pm
that's pretty cool....but not as cool as this guy's home made laptop cooler!


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post #107 of 157
10/5/06 at 4:47pm
Quote:
Originally Posted by tijgert
Like I said, I just bunched up all the red wires into one of these



Really, if you don't get all that I said then you should not attempt it.
Where would you get one of those?
Quote:
Originally Posted by tijgert
As far as linking stuff together to form one circuit, I have no clue what you mean but it sounds like you'll smoke your lappy soon.
That was just i friends sugestion.. i didn't think that was right either
Im way to carefull to try something like that!
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post #108 of 157
10/5/06 at 8:59pm
Thread Starter 
Try Radio Shack. Explain your problem to them, they will help.
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post #109 of 157
10/5/06 at 9:29pm
Quote:
Originally Posted by Jettic
But cant i use the Data + pin on the USB and connect that to the yellow cable on the fan?(because i wanted to be able to use fan control slot)

Black would go to #4 on USB.. Red would go to #1 on USB so wouldn't yellow go to data + or data - ?

also.. did you have to modify the cables you have to get USB on one end and that weird circle port on the other?

what type of cable or connector was that?

OH dear god your gonna smoke something for sure if you continue on your path.

Ok quick and dirty way of doing things.

1# get a usb cable that plugs into your notebook. Lop off the OTHER END. YOu will see 4 wires, white, black, green, red. White/green are data, seal them up so they do not touch anything, you will will never use green/white. Next get all your fan red wires together, and all your fan black wires together. Those wires will goto the black and red wires on your usb cable. Its really easy, just match up the pretty colors to each other. all reds together, all blacks together. Do not hook them up like batteries in a series of red black red black. Thats all there is to it. The poster went one step further and attached all the fan wires to a plug like on your dell power cable. He then put a female plug on the usb cable, so he can connect the cooler to either his usb slot for 5 volts, or to the wall using a 12 volt adapter.


As for your fan yellow wire, its just a 5v pulsed signal that ticks twice a revolution. You can not measure that with the data cables of your usb cable, end of argument. If you try, you will fry your poor little data inputs on your usb port.
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post #110 of 157
10/5/06 at 11:00pm
Quote:
Originally Posted by tijgert
Like I said, I just bunched up all the red wires into one of these
I already knew that the whole fan control thing wouldn't work, it was scratched from my design earlier
(i may be uninformed but im not stupid )

What I want to know is were tijgert got that white connector^ to hook up the red and black cables in groups.

Once I know what that plastic thing is I can further my planning on how im going to do this....

Heres what im thinking of doing right now:

Laptop<-USB end -----------------Plastic piece-->red wires together -->Fan1
____________^B > pin 4 on USB(gr)^____________\->bLk wires together \->Fan2
____________^R > pin 1 on USB(5v)^__________________________________\->Fan3


Im not going to try to use the data pins anymore just ground and 5v power...

So I would cut the white and green wires and keep them from touching anything?
And does anyone know were to get that white plastic connector?
Any dangers in hooking it up the way it is in the diagram up^there?

Thanks and sorry for being an annoyance....
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post #111 of 157
10/6/06 at 8:23am
AH, ok what you are looking for is a terminal strip, we use them all the time in arcade cabs.

http://www.radioshack.com/search/ind...032058.2032231

personaly i like this one cuz you can use a standard screwdriver with them, and can man handle them a little.

http://www.radioshack.com/product/in...entPage=search


Anyway i cant under stand your acii art so it here it goes. Again its just wad up all the red wires of the fans together and connect them to the red wire of the usb plug. Connect all the black fan wires together and connect them to the black wire of the usb plug. the green/white wires are data and insulate them by putting heatshrink on them or electrical tape.
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post #112 of 157
10/6/06 at 10:53am
Thread Starter 
Thanks nightanole for coming to the rescue in the 'Save Jettics' lappy'-a-thon

It MUST be clear now.. must'nt it?

Oh well, if you do see smoke, take pictures!
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post #113 of 157
10/6/06 at 10:25pm
Quote:
Originally Posted by tijgert
Thanks nightanole for coming to the rescue in the 'Save Jettics' lappy'-a-thon

It MUST be clear now.. must'nt it?

Oh well, if you do see smoke, take pictures!
Yeah it's clear now.

tijgert what material did you use for the actual pad?

And is there any problem with using LED fans?

Here is what I have so far:
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post #114 of 157
10/7/06 at 6:07am
Thread Starter 
The schematic looks just right and what a nice USB connector have you drawn

The material I used was Lexaan, but I'm not sure what the English name for that is. Lexan maybe.
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post #115 of 157
10/7/06 at 6:45am
lexan is the english word for it, though people would think of it as plexiglas.
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post #116 of 157
10/7/06 at 8:54am
led fans are a no go. They just wont light at 5v, they are very dim at 7v. Howver they still will spin, so if thats all you have to work with they will still function as fans. leds will work off 5v, you just need to find an led calculator to find the right resistor to use. Now mind you that one bright white/blue led will suck 500ma by it self.
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post #117 of 157
10/7/06 at 9:33am
Thread Starter 
Also keep in mind that the bigger the fan the more of a startup kick it requires. Too big and 5v might not start it turning.
It's probably best to take those extra thin hard drive cooler fans like I did, their weight is obviously less than ye olde standard 80mm.
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post #118 of 157
10/7/06 at 10:48am
nice work , but one question,how could you stand the noises?
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post #119 of 157
10/7/06 at 11:31am
Thread Starter 
What noises?? a 12v fan running at 5v is as silent as a mouse. If you use your lappy the internal fans would make more noise.
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post #120 of 157
10/7/06 at 12:44pm
Quote:
Originally Posted by tijgert
Also keep in mind that the bigger the fan the more of a startup kick it requires. Too big and 5v might not start it turning.
It's probably best to take those extra thin hard drive cooler fans like I did, their weight is obviously less than ye olde standard 80mm.
The fans I planned to useing are 80mm LED's so I take that won't work?
What size and specifications were the fans you used?
Is there a chance of frying my mobo or USB port by not allowing the fan to draw over 5v power or will it just not work to full potencial?

Quote:
Originally Posted by nightanole
led fans are a no go. They just wont light at 5v, they are very dim at 7v. Howver they still will spin, so if thats all you have to work with they will still function as fans. leds will work off 5v, you just need to find an led calculator to find the right resistor to use. Now mind you that one bright white/blue led will suck 500ma by it self.
Would smaller fans be able to use LED's with under 5v?
Were would the resistor go? on the fan chip or on the red wires?
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