| part2wanksta |
i have a 120mm fan and a 80 mm fan connected together and i wanna hook them up to a 13v adapter.
will the extra 1 volt mess anything up. or will i be okay |
|
|
| Duo |
13V will be fine on those box fans.
lol, I have an array of them running at 24V which is about as hard as I've been able to run them for extended periods of time. ;) |
|
|
| ace3000_1 |
| quote: | | lol, I have an array of them running at 24V which is about as hard as I've been able to run them for extended periods of time. |
You might wana watch that. Anyone of those coils burn out in those fans and you got a fire.
Most 12v fans are rated to 13.8v or 14.5v.
Trev:) |
|
|
| part2wanksta |
yeah maybe i will go up to 24v. i was using 1 12v adapter on 5 fans. and they didnt seem to do much.
so now i am going to use 3 adapters.
13v 80mm and 120mm
12v 80mm and 120mm
12v 80mm
can i go with a 30v and power them all |
|
|
| Duo |
Well, firstly, yes, I did understand that over heated coils = fire. I'm living with the fact that this may occur and i'm fine with it. They're just a lot of old cheap used computer fans.
In an application where you need the fan to cool something, I wouldn't recommend running it over 15V. It's risky if you're cooling a light fixture or something like that.
If the one 12V adapter didn't run the five fans, that means it didn't have enough current ouput capability. A power supply must deliver more current to heavier loads but at the same voltage. |
|
|
| ace3000_1 |
Most 80mm fans draw 150ma max at 12v.
So 5x 150ma = 750ma.
All you would need is 1 power supply that has a rating of 12v @ 1amp and your set.
Trev:) |
|
|
| ace3000_1 |
| quote: | | In an application where you need the fan to cool something, I wouldn't recommend running it over 15V. It's risky if you're cooling a light fixture or something like that. |
Wheather its cooling somthing or not its gonna burn out, its like running a 120v lamp on 240v!!!
If they dont spin fast enough at 12v, get ones that do.
Trev:) |
|
|
| nick[x1] |
| They were designed to run at or around 12v so thats what they should be run at really. Just get a decent PSU with a bit of power behind it to provide the power to all fans at 12v :) my 5A 12psu is great |
|
|
| Guy Grotke |
You could run two identical 12 volt fans in series from a 24 volt power supply. Or pairs of those series-wired fans, wired in parallel to the 24 volt PS. Or you can just save yourself the hassle and get fans that match your power mains: 120 or 240 VAC.
Since my LCD came with its own power supply, I just used a 120 VAC fan. So I don't have any need for an additional power supply. This only comes up if you are using a 12 volt LCD (designed for a car) that did not also come with a power mains adapter. Or maybe if you are trying to build a projector for your car!!! :D |
|
|
| part2wanksta |
well i used my 13v adapter. it was rated at 0.8a so it was good enough to power them all. my lcd doesnt even get warm.
im so happy. lol |
|
|
|
