Laptop cooler voltage question

DIY er

Hey, so i am making a cooler for my laptop, and i have 3 12V fans that i am going to run to a single phone charger and plug into the wall. i was just wondering if the charger can handle that many volts, it says 5V on it. Thanks

a_lost_shadow

If you wire them in parallel you need a charger that provides 12V. If you wire them in series you need a charger that provides 36V. I'd suggest swinging by your local thrift stores. You can probably find a used 12V wall wart for a couple of bucks.

joed

The charger need two thing to be correct. The voltage and the watts. The charge will need to be 12 volts. It also needs to be enough watts or current for the fans. Look on the fans for a current or watts rating and add them up. The charger will need to be the same watts or greater watts to run the fans.
The fans are also likely DC so make sure the charger is DC and not AC.

__________________
Do not PM with questions that can be asked in a forum. I will not respond.

DIY er

i miss read it, it says

input 100-240V
50/60hz 0.3A

output 5V 700mA

the fans are 36V and .63A

i dont know what that means. is that too many volts or watts?

kbsparky

5V x .7A = 3.5 watts
36V x .63A = 22.68 watts

Ain't going to work.

You need 6½ times more power for those fans to work.

__________________
-KB

Life is uncertain -- eat dessert first!!
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

DIY er

thanks! so what are the stats i need on the charger, and could i power 1 or mabye 2?

mpoulton

You can't power any. Here's the deal: The power supply voltage must be THE SAME as the fan voltage. The power supply current must be AT LEAST the combined fan current.

gregzoll

Just pop over to either Radio Shack, Best Buy, local mom & pop store, and get a couple of cpu cooler fans. or computer case cooler fans. Most coolers will use the USB port, not a separate power source, so that they are portable.

__________________

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
: Now listen, Cadet. I've got a job for you. See this button?
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
: Don't touch it! It's the History Eraser button, you fool!
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
: So what'll happen?
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
: That's just it. We don't know. Maybe something bad, maybe something good. I guess we'll never know, 'cause you're going to guard it. You won't touch it, will you?

Evstarr

MOST will in fact be 12vdc since thats what rail a molex connector in a pc case will be connected to.

There are some pre assembled laptop coolers that do run off of USB but a selection of 5 v fans is not going to move a lot of air and will kill your battery.

Most laptops simply don't need it these days. If yours is especially hot underneath, I'd suggest that either you are not placing it on an appropriate surface, or the ventilation channels inside are clogged. Or both.
Do you have pets? Long hair on you or S O? Odd but true that laps are not a great place to use laptops. Either clothing or exposed flesh tends to get in the way of proper airflow.

gregzoll

Evstar, actually Radioshhack sells the 3.5 & 5 volt fans, so does BB.

__________________

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
: Now listen, Cadet. I've got a job for you. See this button?
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
: Don't touch it! It's the History Eraser button, you fool!
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
: So what'll happen?
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
: That's just it. We don't know. Maybe something bad, maybe something good. I guess we'll never know, 'cause you're going to guard it. You won't touch it, will you?

DangerMouse

Quite true. The best thing to use is a lap "pillow" that is basically a cloth beanbag with a masonite top that is hard and flat to keep the fan's airflow going.

DM

__________________
[SIGPIC][/SIGPIC]Click
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
to see some of my original magic tricks and trick boxes!

Evstarr

I'd did say most ... Not all... Lol
Still it's a great way to cut your runtime in half.