Step 3: Power source

The power source for the 140mm fan it going to be a 9V 2.2A power pack. Though its not rated for the fan (12V 2.65A) it still has enough power for this project. My plan is to install a potentiometer / rheostat to be able to control the speed of the fan. Through testing the fan to see if it worked, I found it has far more suction then expected (awesome)

*I have recently added an air scoop to my design so extra air flow will be forced into the internal laptop CPU fan. Since the PS3 fan has far more suction than i originally anticipated, I'm putting some weather stripping on the chill pad to segregate the air flow, that way the PS3 fan doesn't rob the laptop of its natural airflow.
**I'll add the newly updates CAD drawings soon.
This is a great Instructable, but you need to add a main image of the final project to the intro step. Please do that and leave me a message when you have so that we can publish your work. Thanks!
I've built a prototype out of 1/4" cardboard and it works just fine. The rubber feet on my laptop has enough clearance to suck air in from all directions. Matter of fact it works so well that the top of the laptop gets cold as well. The PS3 fan has more than enough suction power to get the job done.
hey man, I wonder what if anything u would charge to make one of these for me, minus the fan of course, Id add that myself :D
very interesting...i was planning on making something like this but all i have is a working ps3...lol...(i have one of the original ps2's (you know, the big boxy ones) and i ripped out the cooling fan from that. anyone have any ideas or links to ideas as to how i could connect a power pack to that or if i could hook that up to a usb port and not have it blow up in my lap? lol
that's not a proper design. you need risers for the laptop to sit on. my cooling plate restricts "breathing" and actually raises the temperature by 5 C. My laptop performs at around 77 C under normal conditions, and it has rubber risers with dual high-rpm fans. also, seems a bit pricey. :P
mine doesn't need risers since the air flow is directed horizontally instead on straight down into the table or my lap. thats the beauty of it. Testing it out with my laptop running full speed  (both cores of the processor maxed out on high performance) the pad colled it down as much as 30 F (give or take 10 C).
I have a PS3 fan as well that I stole out of a non-working PS3. My question is how did you wire it to the power pack?. I have a 12V 2A&nbsp; AC/DC adapter I thought i could use but had no luck splicing it to work with the PS3 fan. Any tips appreciated.<br />
I'm just curious on how noisy the ps3 fan is.
Well to be honest, the 1st 18 mins, it's fairly loud. Since I'm not using the circuitry that's in the PS3, the fan runs at full speed (well almost, the power pack I have isn't quite as powerful as the PS3 but it runs at about 80% of full power). After the 18 min. pass, the circuits in the fan kick in and slow down to near silence while still having a decent amount of air flow. As far as I can tell, the fan has a built in heat sensor, so if I have it running for a while and unplug it for like an hour, it'll run full speed again and the 18 min. resets.
If you reverse the power to the internal fans so they spin backwards, put ice in front of it, you got a good chiller.
moist air into your laptop = condensation = fried mobo<br/><br/>please dont do this<br/>
Has anyone thought about somehow using one of those electric coolers like the peltier unit, I saw it in this instructable <a href="http://www.instructables.com/id/Air-CoolerHeater/">http://www.instructables.com/id/Air-CoolerHeater/</a><br/>mabey with this you could cool the air even more.<br/>
This is really cool but would be alot nicer if it was usb powered like the $9 laptop coolers you buy from japan on eBay. they also use three fans.
Unfortunately the PS3 fan is rated 2.65A where a USB port is only about 500mA. There wouldn't be even close to enough power to get the fan turning. A power pack is my only option. Plus the 140mm fan has more than enough suction to get the job done. When I first tested the fan to see if it worked, I had it on my bed. After it started, it sucked the corner of my fitted bed sheet right off the bed. Plus with the PS3 fan, it blows the air out the sides. If I had it set up like a "normal pad" where it uses a standard tower fan, it would blow all that hot air right into my lap and/or my lap would block the air flow....much like it does now with the laptop itself. (The placement of the laptop CPU fan sits right where your leg is, so the air flow is cut off).
thats pretty cool, i didn't realize they put such good fans in the PS3. power pack or not, job well done.

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