56 replies to this topic

[eniparadoxgma]

So, say you're on some kind of mad scientist trip and decide to rig some computer fans to run on AC by chopping the ends off of both the fan wires and some 12v AC adapters. You tie the wires up and the first fan works fine.

However, after taping up the wires you notice the fan is actually running in reverse (blowing air out the way the air should be taken in, etc).

Think anything bad can come from that?

And as opposed to just using the tie up/electrical tape method do you think I should go the full monty and try to solder it?

Muahahahaha.

[Nvyseal]

Firstly, I think your using an AC plug, but your adapters are converting your power to DC which explains your fans running backwards. If you fans are marked with a specific rotation, Yes it could hurt the fan, but most DC fans made today can go RJ (one way or another)

[m.oreilly]

...til they catch fire, along with your stuff...these are dc fans, not ac. even though many are rated for high power consumption (re vantec tornados), i'd hate to 'speriment...

ac fans:
http://www.frozencpu.com/cat/l2/g36/c265/l..._115V_Fans.html

[eniparadoxgma]

I thought that the fans ran on 12v, so if you spliced them into 12v AC adapters you'd be fine. From what I've read you can use less than 12v but the fans will run that much slower...




Come on, fire? I woulda thought some of these people I've read about doing it would've came back and posted about their houses burning down by now...

[m.oreilly]

last i checked, my house current was 110 volts. have to check the amps on the circuit. what are these "12volt ac adapters" you speak of? i'm kinda under the weather tonight, maybe after a few more beers i'll be "plugged in"...

[m.oreilly]

so, you are plugging the fans directly into the wall, or are you talking of removing the mini molex, and using the larger psu style molex, allowing 12vdc (which should be the same, unles you are using fans w/pwm leads disconnected...)? oops, reread your first post. what are these 12volt ac adapters?

[m.oreilly]

[eniparadoxgma]

hehe, I'm talking about random AC adapters like that are used for electronic devices such as phone chargers, or keyboards, or printers, etc.

From what I know, as long as the voltage of the adapter isn't more than the voltage of the fan, you're good. So as most fans are 12volt, you can use adapters that are 12v on down, but the lower the voltage of the adapter the less power the fan gets and hence the slower it'll spin.

So you cut the end off of an AC adapter, and the end off of a fan wire. Then tie the positives together and negatives together, make sure it runs, then use electrical tape to tape everything up. Then you're good.

Hopefully.

[eniparadoxgma]

m.oreilly, on Jan 24 2008, 09:40 PM, said:

lol What's that about, wacky-man?

OH CRAP MY ROOM IS ON FIRE!!!!1

[m.oreilly]

um, why are you using these to power fans? it's the same thing (albiet an odd thing to do) as what your psu does: it transforms the ac to acceptible dc levels for your system devices, like fans and such...

[eniparadoxgma]

m.oreilly, on Jan 24 2008, 09:48 PM, said:

um, why are you using these to power fans? it's the same thing (albiet an odd thing to do) as what your psu does: it transforms the ac to acceptible dc levels for your system devices, like fans and such...

haha, I'm on some mad scientist rampage. The fans aren't for my computer. I'd tell you, but then I'd have to...steal your 16 cpu core rig and use it to power my neighborhood!

[talker]

eniparadoxgma, on Jan 24 2008, 08:51 PM, said:

haha, I'm on some mad scientist rampage. The fans aren't for my computer. I'd tell you, but then I'd have to...steal your 16 cpu core rig and use it to power my neighborhood!

Does anyone have the number to Homeland Insecurity. This definitely sounds like something they would be interested in knowing...talker.

[m.oreilly]

eniparadoxgma, on Jan 24 2008, 08:51 PM, said:

...The fans aren't for my computer. I'd tell you, but then I'd have to...

...charge?



you got hot pants?

[eniparadoxgma]

So now you know...about the FANS OF MASS DESTRUCTION!!!

[eniparadoxgma]

m.oreilly, on Jan 24 2008, 10:00 PM, said:

you got hot pants?

Hey, you said it.