Temperature-based fan speed control for unRAID

[bubbaQ]

The 4-pin is for power (diskette drive connector)  The 5-pin at the upper right is internal USB.  The silver block next to it is the conventional USB-typeB.  THe four 3-pin on the far left are for Dallas 1-wire temperature probes.

 

I'll eventually post all my code someplace like Google Code.  But right now, it is too ugly.... needs some of those things you call "comments" added to it.

 

[queeg]

Is there any way to have it turn something on or off like an LED?  With fans it probably changes the voltage to slow or speed them.  But with lights it's on or off. 

 

 

[bubbaQ]

Fans are controlled using Pulse Width Modulation (PWM) not voltage.

 

There are 4 binary low-power outputs that can be switched on and off.

 

But you have a 20x2 matrix LED display... that's plenty of LEDs.

[CaptainSpalding]

I have a CoolerMaster Stacker STC-01 that has 4-in-3 cases /w CM fans. In one of those cases the hdd's show temps of 34-36 celsius.

 

The fans are about as loud as my LCD projector, they don't have PWM.

 

Is there any possibility to get them quiet down with temperature based cooling or are they just so hot that slower fan speeds would rise temps too much?

 

Those hot drives are mostly Seagates.

 

I hope this project goes well!

[jumperalex]

Bringing this back from the dead ... did this go anywhere?

[squirrellydw]

I just bought this

http://www.newegg.com/Product/Product.aspx?Item=N82E16811997017

 

[xamindar]

Bringing this back from the dead ... did this go anywhere?

It appears the consensus was that it is just too expensive to add an LCD just to control and show fan speed. "Temperature-based fan speed control for unRAID" without these front LCD units is easy to do and more importantly, it can be done for free.