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Old 07-01-2007, 05:05 AM   #11
Fingers
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Well, there you go, Yuri, I thought the fan was AC. We had some similar looking fans in our microwave radios but they were AC. Hence my confusion. Absolutely no point in using a rectifier on a flat waveform.

Greenhornet, your supply will be fine for that fan. You might want to build this to control your voltage:




The output voltage is set by the ratio of the two resistors, R1 and R2, so your 12Volt input is fine. You can also use an LM317 instead of the LM117.


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Old 07-01-2007, 05:32 AM   #12
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Actually, you might have better results if you change R2 to 2000 ohms.


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Old 07-01-2007, 05:38 PM   #13
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Cool, I was thinking of using a fan speed controller like yuri suggested.

like this one: http://www.newegg.com/Product/Produc...82E16811998129

 
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Old 07-01-2007, 05:42 PM   #14
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Well, if you want to take all the fun and adventure out of it, go ahead.

Anytime Yuri gives some advice, you can bet it's on the money.
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Old 07-24-2007, 07:13 PM   #15
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I have this sitting around, and it just hit me:



with some extra thought going into this, I can get an adjustable fan speed, and the ability to even make a 'remote' stir plate and temp probe to go under the flask just for the hell of it.

What do you think Yuri? Obviously it would go into a housing of sorts! Or I can completely disassemble it into something cooler!
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Old 07-24-2007, 07:32 PM   #16
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If you get your self an external 5.25 inch drive housing then it'll be good to go.

http://www.area450.com/hardwaremods/...lhdpluscf.html
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Old 07-24-2007, 08:06 PM   #17
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I just had a funny thought; why not use a cheap hard drive enclosure, and then power the fan through the 5V line on the USB cable? Could make an interesting geek project, and no power supply required! My computer's always on, at least.

 
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Old 07-24-2007, 08:16 PM   #18
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Quote:
Originally Posted by orfy
If you get your self an external 5.25 inch drive housing then it'll be good to go.

http://www.area450.com/hardwaremods/...lhdpluscf.html
I have one, but it's a big metal POS. That will screw with the magnets right?

Quote:
Originally Posted by RadicalEd
I just had a funny thought; why not use a cheap hard drive enclosure, and then power the fan through the 5V line on the USB cable? Could make an interesting geek project, and no power supply required! My computer's always on, at least.

and you can gaze at it while you are on HBT!
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Old 07-25-2007, 12:20 PM   #19
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This is what I was playing with last night. Using different fans, I found the bigger black one was better than my cool blue LED one

I was going for the BierMuncher theme with it being ugly, but working, but I think I have an idea for a nice enclosure. I am also thinking about making a jack on the side where I can plug in another 'fan' for a second stir plate off the same power supply and fan controller. I need to dig up some switches. I'm not investing any money but stir rods for this project, I know I have all of this crap around the house. Here is what I have so far




Since this pic I have taken one of the fan controllers out of the Thermaltake Hardcano 9 and I've chosen the black fan over the blue LED one. Next up is an enclosure, and switch.
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Old 07-25-2007, 12:34 PM   #20
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HMMMM.....I wonder about that Thermaltake Hardcano 9. That might make a nice controller for a fermentation cabinet with multiple fans and thermal chambers.....think it's possible/practical?



 
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