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PostPosted: Sat Dec 14, 2002 9:47 pm 
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SPCR Reviewer

Joined: Sun Aug 11, 2002 3:26 pm
Posts: 3998
Location: Phoenix, AZ
This may suit your needs:

http://www.heatsink-guide.com/tempcontrol.htm

I've got one running on my a 120 panaflo. Works great for me. And its cheap!

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PostPosted: Mon Jan 06, 2003 8:37 pm 
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Patron of SPCR

Joined: Mon Oct 21, 2002 1:01 am
Posts: 543
Location: Vancouver, BC, Canada
I can't give you a circuit schematic of how to do it, but this semi-broken link to a discussion on arstechnica shows that it's possible to set a minimum speed for the fan.

UPDATE: Found it. Go to http://people.freenet.de/s.urfer/fan_control.htm. It does everything you need, including having a min. voltage and a max-voltage startup for those fans that won't start at low voltage. It's complicated though. I think parts of the circuit can be grafted onto the simpler one that Rusty linked up. When I have a chance to experiment, I'll post my findings.

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