Multiple temperature setpoints for turning on fans

[FroMan]

Is there a way for me to build a device that could turn on multiple fans at different set points?

i.e
temp hits 80F - (1st) 12 V 120mm fan turns on.
temp hits 81F - (2nd) 12 V 120mm fan turns on.
temp hits 82F - (3rd and 4th) 12 V 120mm fan turn on.

I know that there are some off the shelf devices that will allow you to turn on 1 outlet, but are there devices that will allow for multiple?

 

[hmott]

I believe their are controllers that can handle that. I would check with ronc98 here on reefcentral first. I think his controller will do it, but I'm not 100% sure. I can't think of any others off the shelf that might. I imagine its going to be pretty expensive no matter how you go about it.

 

[asfullax]

The aquacontroller SHOULD be able to as long as you use diffrent ac2dc transformers for each fan. You could build a quick program that handles the outlets.

So,
1 aquacontroller
3(or 4) 120vac to 12vdc transformers
4 fans
3 (or 4) outlet modules.

 

[neo1013]

i run a simple out of the box device on my computer that does that with 4 different set points. it is called a fan controller, it of course runs off of a computer power supply, and has 2 different temp sensors. check out CDW.com

 

[kamla]

neo1013 - What do you use...
any links..

 

[neo1013]

something like this. http://www.frozencpu.com/bus-64.html