- Tue Feb 26, 2008 7:11 am
#43493
Its alot to read, but if you read more toward the bottom of the page, he mentions that the fans can run off the 5 volts without the need of the 9 volt rechargeable battery, but we wanted the fans to move more air out faster, so thats why he used the battery.See the 360 has a built-in variable power to the fan connector,so it normally runs the fans @ 5v, as the 360 gets hotter it then auto adjusts to 7v, and 12v.Because mine is watercooled, it never gets hot enough to trigger the auto adjusting feature, so it normally would never go above 5 volts.Thats why i bypassed a transistor so the fan connector always outputs 12v.But it is way too loud, so i then reduced it to 9 volts.
As far as running the fans @ 5v after powering down, and adding a timer to run for 10 minutes....If a relay is the cleanest way to do this, then thats the route i will have to take.I was just hoping that i could substitute the 5v DPDT relay for one that is more common to find.Locally the only 5v relay i can get is a 5v SPDT , 5v SPST reed relay, or a 12v DPDT relay.Would it be possible to use two 5v SPDT relays, or somehow make a 12v DPDT relay work? Im gonna guess here and say that a 12v DPDT relay would require 12v to work? So going back to the rechargeable battery idea, I dont think they make rechargeable 12v batteries(besides the big box type) So maybe a 9v rechargeable and two AA rechargeable batteries to equal 12 volts could work?