From: "warren weber"
Subject: Re: Need help with temp-control design!
X-Newsreader: Microsoft Outlook Express 5.00.2014.211
Date: Wed, 04 Sep 2002 03:03:11 GMT
NNTP-Posting-Date: Wed, 04 Sep 2002 03:03:11 GMT
Organization: AT&T Worldnet
Basher wrote in message
> Just so everyone knows, yes, I'm a rookie at this. I've done some minor
> hacking but other than that, I've not really done too terribly much.
> That said, this is what's going on... I'm designing a power-supply unit
> for my computer fans (I'm a case-modder). I'm going to be controlling
> seven fans, on independant 12v/off/5v circuits.
> Now, this is what I need help with... I want to add an 'overheat
> protection' system, so in case I leave my fan system off, and the
> computer gets too hot, it'll turn all the fans on high (12v) to prevent
> system damage. This system needs to be user-adjustable (a 10-turn
> potentiometer would do, right?) as well, so I can find a good point to
> set it at, and leave it there.
> Anyone know parts I need, or maybe can toss me a rough schematic like
> '12vdc > thermistor > etc...'. Remember, this has to be able to handle
> enough power for -SEVEN- high-speed (>120cfm in most cases) fans as
> Much MUCH thanks in advance! Once I finish drawing out the schematics on
> my computer (graph paper is my medium of choice for such) I'll post them
> if nobody minds. Share the wealth, you know... And I could probably use
> a little proofreading, anyway. :)
> -- Basher
Would'nt a 130 degree F snap action thermostat work? Warren