Quantcast

Maximum PC

It is currently Tue Sep 16, 2014 1:41 am

All times are UTC - 8 hours




Post new topic Reply to topic  [ 13 posts ] 
Author Message
 Post subject: building a notebook cooler
PostPosted: Tue Sep 09, 2008 3:43 pm 
Team Member Top 250
Team Member Top 250
User avatar

Joined: Tue Apr 15, 2008 8:01 pm
Posts: 1260
i'm getting ready to make a note book pad, figured this is a easy mod since all it is its powering a couple fan and cutting plastic to make a frame.

I have a black and decker portable battery i was planing to use as the PS (the benefit being if the plug comes out the cooler has its own battery to keep it going. and was goignto pick up a couple 120 mm casefans from new egg (the logisys CF120RD is a bargain at $4.99) maybe toss in a powered usb hub to fill all that empty space but my main herdle is how do i convert the 4 pink case fan plug to something that will plug into a stadard 2 prong outlet jack on the battery?

ideas?


Top
  Profile  
 
 Post subject:
PostPosted: Tue Sep 09, 2008 6:08 pm 
Million Club - 5 Plus
Million Club - 5 Plus
User avatar

Joined: Fri Apr 25, 2008 6:35 am
Posts: 1998
Code:

Code:
pin  desc   color

1    GND    Black
2    12 V   Yellow
3   Sense   Green
4   Control Blue



from here

Id just cut the fan leads, make an adapter to fit the B&D battery and use some sort of quick disconnect plugs from radio shack to tie it all together. all you need is pin 1 and 2 (leave 3 and 4 disconnected) and the fan will run at full speed at 12v.

you may need some sort of voltage regulator to power the USB hub, depends on the voltage of the battery (LM 7805 on a heatsink maybe) and the fan (LM 7812). you may need a rectifier to prevent any voltage from feeding back to the computer. not sure how you want to wire it all up, so all thats a guess.

whats the exact battery?


Top
  Profile  
 
 Post subject:
PostPosted: Tue Sep 09, 2008 6:59 pm 
Team Member Top 250
Team Member Top 250
User avatar

Joined: Tue Apr 15, 2008 8:01 pm
Posts: 1260
Black and Decker Pocket Power
Model: CPI20B
input: 9.6 DC == 3.0A
Inverter Output: 115VAC ~ 60hz, 16W
(it also has a USB output)
USB Output: 5VDC = 350 mA


Top
  Profile  
 
 Post subject:
PostPosted: Tue Sep 09, 2008 7:47 pm 
Million Club - 5 Plus
Million Club - 5 Plus
User avatar

Joined: Fri Apr 25, 2008 6:35 am
Posts: 1998
hmm.

seems kinda pointless to use that really. 120v @ 16 watts is pretty useless. it wont power a notebook (notebook adapters are around 75-90 watts) or even a powered USB hub (thats 24 watts with 4 ports at full load). 5v @ 350 ma is kinda useless too as a standard USB port will sink 500 ma.

might charge a cell phone or ipod though. I kinda get the impression thats what its made for, to charge those via USB or the cell/ipods 120v wall wart charger.

might be better off running the fans right off the battery pack directly. 9.6v on a 12v fan will give nice airflow at reduced noise and rpm.

or you might be able to run the fans off the things 350 ma USB port (get a cable, chop it and wire the fans to it) but Im not sure how well those fans will run at 5v.

EDIT: just looked it up, yup its for cell phones mainly. and its 250 ma on the usb port.

still might be able to run the fans off the usb port.


Last edited by CharBroiled on Tue Sep 09, 2008 8:04 pm, edited 1 time in total.

Top
  Profile  
 
 Post subject:
PostPosted: Tue Sep 09, 2008 8:04 pm 
Team Member Top 250
Team Member Top 250
User avatar

Joined: Tue Apr 15, 2008 8:01 pm
Posts: 1260
well i was going to wires the fans tothe battery


Top
  Profile  
 
 Post subject:
PostPosted: Tue Sep 09, 2008 8:09 pm 
Million Club - 5 Plus
Million Club - 5 Plus
User avatar

Joined: Fri Apr 25, 2008 6:35 am
Posts: 1998
batteries are internal on it? not sure how youd get to them.

easier to get a rechargeable battery pack from a toy R/C car and use that, they come in 7.2 and 9.6 (plus others).. cheap, standardized (well more or less), off the shelf, easy to adapt to most anything, been around forever.

sorry to be the bearer of bad news. :(


Top
  Profile  
 
 Post subject:
PostPosted: Tue Sep 09, 2008 8:13 pm 
Team Member Top 250
Team Member Top 250
User avatar

Joined: Tue Apr 15, 2008 8:01 pm
Posts: 1260
i was talking about wiringthe fans to the Black and Decker standard 16V plug


Top
  Profile  
 
 Post subject:
PostPosted: Wed Sep 10, 2008 2:46 am 
Million Club - 5 Plus
Million Club - 5 Plus
User avatar

Joined: Fri Apr 25, 2008 6:35 am
Posts: 1998
didnt know about the 16v plug.

you can get some serious rpm outta fans with that :)

you should use a voltage regulator or potentiometer to get them to 12v or under. that kinda wastes a bit of power (as heat) and makes it a tad more complicated though.

better way might be to just wire the two fans in series to keep it simple (each gets 8v, a decent compromise between battery life, noise and air flow).


Top
  Profile  
 
 Post subject:
PostPosted: Wed Sep 10, 2008 10:38 am 
Team Member Top 250
Team Member Top 250
User avatar

Joined: Tue Apr 15, 2008 8:01 pm
Posts: 1260
CharBroiled wrote:
didnt know about the 16v plug.

you can get some serious rpm outta fans with that :)

you should use a voltage regulator or potentiometer to get them to 12v or under. that kinda wastes a bit of power (as heat) and makes it a tad more complicated though.

better way might be to just wire the two fans in series to keep it simple (each gets 8v, a decent compromise between battery life, noise and air flow).


ideall what id like to do it set it up so when the cooler is pluged in both get full speded and voltage but if the plug coems out it would run off the battery but not sure how to pull it off


Top
  Profile  
 
 Post subject:
PostPosted: Wed Sep 10, 2008 12:28 pm 
Million Club - 5 Plus
Million Club - 5 Plus
User avatar

Joined: Fri Apr 25, 2008 6:35 am
Posts: 1998
you mean you want to be able to plug it into the notebook and have it power the fans, but if it comes unplugged have it run off the external battery?

all notebook coolers I know of run off 5v USB power, so those 12v fans will be very undernourished. but they may run, albeit slowly.

you would need a voltage regulator to bring your 16v battery to 5v and a diode to prevent back current into the notebook and probably something to prevent a discharged battery from trying to pull too much current from the notebooks USB port as it tries to charge (or another diode to prevent it from charging off the notebook altogether).. bit complicated and easy to get wrong if youre not comfortable with electronics. if youre a novice at it I wouldnt try it unless youre fond of dead notebooks.

mucho easier (and safer) to just build it to run off the 16v battery period and forget about dual powering it. run B+ to [fan 1 pin 2], [fan 1 pin 1] to [fan 2 pin 2], [fan 2 pin 1] to B-.. each fan will get 8v.


Top
  Profile  
 
 Post subject:
PostPosted: Wed Sep 10, 2008 3:19 pm 
Team Member Top 250
Team Member Top 250
User avatar

Joined: Tue Apr 15, 2008 8:01 pm
Posts: 1260
no you misunderstand

i wanted to hook the fans up to the Black and Decker Pocket Power

Quote:

PostPosted: 10 Sep 2008 02:59 Post subject:
Black and Decker Pocket Power
Model: CPI20B
input: 9.6 DC == 3.0A
Inverter Output: 115VAC ~ 60hz, 16W
(it also has a USB output)
USB Output: 5VDC = 350 mA


Rigged so when the Pocket power (which will be with the fan inside the casing) is pluged into a socket the fan will run at full power but if the plug comes out it would use the Black and Deckers 16V standard plug power.


Top
  Profile  
 
 Post subject:
PostPosted: Thu Sep 11, 2008 1:41 am 
Million Club - 5 Plus
Million Club - 5 Plus
User avatar

Joined: Fri Apr 25, 2008 6:35 am
Posts: 1998
I pretty much have to give up on this one. without the actual unit to play with its all guesswork on my end. sorry.


Top
  Profile  
 
 Post subject:
PostPosted: Thu Sep 11, 2008 10:36 am 
Team Member Top 250
Team Member Top 250
User avatar

Joined: Tue Apr 15, 2008 8:01 pm
Posts: 1260
link tothe Black and Decker

http://www.homeandbeyond.com/prod-02067 ... 0206732-00


Top
  Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 13 posts ] 

All times are UTC - 8 hours


Who is online

Users browsing this forum: No registered users and 2 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
Powered by phpBB © 2000, 2002, 2005, 2007 phpBB Group