Comair Wiring

[Goronae]

I just got the 24v comair rotron. I also have a spare 3-4 pin connector adn a 4 pin ide power splitter. hwo would I rig up the fan to run off my psu?

[pby5cat]

don't use a three pin connector to plug into the mobo

Identify the ground, usually black, and identify the hot, usually red. Use the 3 to 4 pin adapter and cut off the 3 pin head. sodder and insolate the corrisponding black and red wires.

[Daemonfly]

Don't use the red, thats only 5v.

The Comairs have the little solder terms on them, might accept the fine 1/8" female spade connectors too. Just run the fan at 12v - it should run just fine, and at 12v, it will be pretty silent. Use the 4-pin connector, black to the comair fan negative terminal, yellow to positive terminal.

[Goronae]

Well i was away for last night and didnt get to see your replies. now that I've read them I realized I made a mistake the fan is infdact the 12v version will this make a difference in the wiring?

[i_like_penguins]

no, the yellow wire from the psu still goes to the red wire on the fan and the black wire goes to the black wire. that will give you 12v. if you want to run the fan at 5v then use the red wire from the psu instead of the yellow one. you can also get 7v by connecting the yellow wire from the psu to the red wire on the fan and then the red wire from the psu to the black wire of the fan.

[FunkDaMonkMan]

just connect the postive wire on the fan to the yellow wire on the molex connector, and the negative wire on the fan to the black wire right next to they yellow wire on the molex.

[rogerdugans]

The comair rotrons I have are the 24 volt versions- pretty good but not quite as good as I'd like.....

But fro the wiring: especially with the 12volt fans I would suggest using a pot for variable speed.

Mine are both on pots although they will not run with less than about 10.5 volts supply; the 12 volt versions should be good for considerably lower voltage and near silence.