My DIY fan controller

Control: management of fans, temp/rpm monitoring via soft/hardware

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xen
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Posts: 243
Joined: Fri Dec 28, 2007 11:56 am
Location: NH, Netherlands

My DIY fan controller

Post by xen » Thu Nov 10, 2016 10:11 pm

So I went ahead and crafted my first (easiest, safest) voltage controller.

Image

Erm, this is a picture with its internals open.

But all I can offer at this point is the complete overview picture of this graphics card:

Image

Not all pictures are as good:

Image

It's so unsharp it gives you a headache...

Anyway I got myself some tools...

Image

And some soldering equipment...

Image

The rest, as they say, I s history.

I used a TO-220 package 7808, as you can see on the pictures. This is simply a converter that will dynamically lower resistance depending on the load, to ensure a fixed and constant resistance of in this case 8 V (7808). It's not more difficult than that.

The wiring is simply:

Code: Select all

fan |  r -------------->  |  | <-
    |  b -------------->  |  | <--------------> b
    |                     |  | ---------------> y
To my dismay the shrink-wrap set I had ordered on ly had big stuff in it, and the smallest one was too big for those single wires. Still not as ugly, but not as nice either.

I... slightly burned (sooted) on of the connectors (at the fan) ans for this I am not happy ;-).\

I used a ready-made cheapest-available 2-wire female (fan) plug hence the yellow wire on it.

That yellow wire is just 12V, not signaling.
Cooler Master Silencio 550 - Nexus Value 430 - Gigabyte GA-MA78GM-UD2H - Athlon X2 5050e 2.6GHz - Scythe Ninja2 - Samsung Spinpoint M8 500GB 2.5" - ZOTAC GT 640 ZONE
Antec P180 mini white - Corsair ??? - Asus M5A78L-M/USB3 - AMD FX 6300 3.5Ghz - Scythe Mugen 4 PCGH - Samsung Spinpoint M8 1GB 2.5" x4 - 8GB Kingston white Fury @ 1866 - MSI GTX 9?0 2GD5T OC

xen
Friend of SPCR
Posts: 243
Joined: Fri Dec 28, 2007 11:56 am
Location: NH, Netherlands

Re: My DIY fan controller

Post by xen » Thu Nov 10, 2016 10:21 pm

Here is a close-up of the result at the card (in the computer):

Image

The shrink-wrap looks like a half-hard dick, which is why I don't like it.

But as you can see I have just taken 2 wires out of the 4-pin housing and put it into my own 2-pin housing and connected it to the fan controller with a 2-pin header.

I don't have a good picture of the computer yet as it's too dark.

As I said in the other thread,....

This card has a minimum fan speed of 1580 RPM, and normally this is called "43%" in GPU-Z.

I did also mod the BIOS to allow for lower fan speeds but I am not sure it did anything because my fan kept stuck at 1580 RPM so any diverse reading you get now is a percentage of the maximum value you have configured in the BIOS (in the ROM).

Irrelevant for the rest of it.

This is also why I performed this mod, because the BIOS mod had not changed a thing for this card.

In an open case the fan stays 860 (860 is the new default speed!!!) until about 50 degrees Celcius and then ramps up to 1275 RPM at 66 degrees. But in my open case, which would usually have less effective airflow, the card never goes higher than 66 degrees under Furmark so I must wonder why the hell those designers opted for ridiculously loud fan speeds.

Is it because they wanted to sell more Gaming cards?
Cooler Master Silencio 550 - Nexus Value 430 - Gigabyte GA-MA78GM-UD2H - Athlon X2 5050e 2.6GHz - Scythe Ninja2 - Samsung Spinpoint M8 500GB 2.5" - ZOTAC GT 640 ZONE
Antec P180 mini white - Corsair ??? - Asus M5A78L-M/USB3 - AMD FX 6300 3.5Ghz - Scythe Mugen 4 PCGH - Samsung Spinpoint M8 1GB 2.5" x4 - 8GB Kingston white Fury @ 1866 - MSI GTX 9?0 2GD5T OC

xen
Friend of SPCR
Posts: 243
Joined: Fri Dec 28, 2007 11:56 am
Location: NH, Netherlands

Re: My DIY fan controller

Post by xen » Sun Nov 20, 2016 7:13 am

No responses, lol? Did I do something so stupid?
Cooler Master Silencio 550 - Nexus Value 430 - Gigabyte GA-MA78GM-UD2H - Athlon X2 5050e 2.6GHz - Scythe Ninja2 - Samsung Spinpoint M8 500GB 2.5" - ZOTAC GT 640 ZONE
Antec P180 mini white - Corsair ??? - Asus M5A78L-M/USB3 - AMD FX 6300 3.5Ghz - Scythe Mugen 4 PCGH - Samsung Spinpoint M8 1GB 2.5" x4 - 8GB Kingston white Fury @ 1866 - MSI GTX 9?0 2GD5T OC

CA_Steve
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Re: My DIY fan controller

Post by CA_Steve » Sun Nov 20, 2016 7:29 am

Nice DIY.
1080p Gaming build: i5-4670K, Mugen 4, Asrock Z97 Anniversary, MSI GTX 1660 Gaming X, 8GB 1866 RAM, Samsung 860 Evo 500GB, Crucial MX100 256GB, WD Red 2TB, Samsung DVD burner, Fractal Define R4, Antec True Quiet 140 (2 front + rear) case fans, Seasonic SSR-550FX. 35W idle, 45-55W video streaming, 170-200W WoW, 318W stress test (Prime95 + Furmark)

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