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Adjustable fans

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KILLorBE

Member
Joined
Mar 28, 2001
Location
The Netherlands
Dunno a place...............But there's a shop in my town that sells stuff like that (I know the guy pretty well and maybe he will tell me how to put something together like that, skip the maybe..........he will help me).
I'll let you know when i've more info.(you'll need to be a bit handy with a soldering iron).

BTW: I should be able to put something together like that myself. (studied electronics for 3+ years).BUT maybe I'll disappoint you.(when I don't come up with something).
 

Colin

Arctic Silver Senior
Joined
Dec 19, 2000
You might want to build a LM317 circuit for each fan. This way you can tune the airflow in your case. Great for cooling and even better for learning about the airflow in your case.
 

dannyk

New Member
Joined
May 25, 2001
I just got one made by Enermax. It has about a 10" long heat sensor wire that you can locate anywhere it will reach in the case. Fan speed is continuously variable from 1800 rpm @ 25C to 3100 rpm @ 85C. Very quiet and inexpensive!

Hey, I did it! This is my first post!
 

Colin

Arctic Silver Senior
Joined
Dec 19, 2000
dannyk (May 25, 2001 10:25 p.m.):
I just got one made by Enermax. It has about a 10" long heat sensor wire that you can locate anywhere it will reach in the case. Fan speed is continuously variable from 1800 rpm @ 25C to 3100 rpm @ 85C. Very quiet and inexpensive!

Hey, I did it! This is my first post!

Link?, and what a great first post.
 

Hoot

Inactive Moderator
Joined
Feb 13, 2001
Location
Twin Cities
stool (May 25, 2001 11:51 p.m.):
Go to http://www.allelectronics.com In the fan section you can find the Nidec BETA V 92mm fan with built-in thermistor. It is catalog# CF-95

The problem i have with this approach is I don't care what the fan temp is. The fan can be blowing 22C air and the CPU can be burning up. With that Enermax solution, I would like it if the min speed to max speed threshold was in the range of 35-45C. I would not want it to wait until my CPU was 85C to kick into high gear. Perhaps I'll get a Quad comparator and gin something up using a remotely placeable thermistor or RTD.

Hoot
 

sifu quoc

Member
Joined
Dec 17, 2000
where can i find the digidoc? i was going to build my own fan controllers, but the 12.5 watt 25 ohm rheostats cost about $20 a piece from digikey and mouser... too much for me, because i need 3-4 of them...
 

Szech

Member
Joined
May 1, 2001
Location
So-Cal
There was a guide on making your own temperature controlled fan off virtualhideout.

Seems decent, but I would prefer a circuit schematic. Oh, and if you want those enermax fans, I believe Plycon is selling them.
 
M

Morpheus

Guest
sifu quoc (May 26, 2001 04:52 p.m.):
where can i find the digidoc? i was going to build my own fan controllers, but the 12.5 watt 25 ohm rheostats cost about $20 a piece from digikey and mouser... too much for me, because i need 3-4 of them...

I used 250 ohm 5 watt rheostats from radioshack (about $3.25) to build my fan controls... actually could have gone to 500 ohm for the 80mms... they work great give a nice smooth control from stalled to full speed on 120s... I was able to mount 3 LEDs, 3 rheostats and 3 microswitch controllers on a 5.5" bay plate... works like a charm... and total cost was about a 20 dollar bill...

Kris
 

sifu quoc

Member
Joined
Dec 17, 2000
i was at radio shack... and their 5 watt potentiometers are acutally 3 watts... my delta already runs at 3.84 watts, 2 panaflo's would be about 10, and my 120mm ys tech would be 7.92 watts... so if i ran the radio shack ones, i'd prolly burn them up pretty fast....

unless someone knows where i can get 10watt rheostats pretty cheap
 
R

rudy

Guest
Here is a link that show you step by step making a veriable fan speed controller using the LM317 voltage regulator.