Fan that control by water temp. - The Planted Tank Forum
 
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post #1 of 12 (permalink) Old 11-08-2008, 03:44 AM Thread Starter
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Fan that control by water temp.

If I turn my fan from 9AM to 5PM (went to work), my water temp. in my CRS tank will drop to 68F.
and I think that's not quite good/suitable for CRS...

So, I would like to make device that can control the fan, (turn ON and OFF), by water temp. if it hit a certain water temp.
But I don't how...

Any suggestion to control the fan?

Thank you for reading my thread...
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post #2 of 12 (permalink) Old 11-08-2008, 03:46 AM
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They do have temp controllers for fans, that would work perfectly.

Cheers, O
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post #3 of 12 (permalink) Old 11-08-2008, 04:34 AM Thread Starter
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Quote:
Originally Posted by Orlando View Post
They do have temp controllers for fans, that would work perfectly.

Cheers, O
Hi Orlando...
thanks for the respond...
May I know where I can get temp controllers for fan?
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post #4 of 12 (permalink) Old 11-08-2008, 04:37 AM
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I believe there is more than one kind, but this is one.

http://www.petstore.com/ps_ViewItem-...-AQLIPAFL.html
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post #5 of 12 (permalink) Old 11-08-2008, 06:08 AM Thread Starter
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orlando thanks for the link...
The price is way more than I'm willing to spent...

Anyone know how to DIY this fan controlling thing?
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post #6 of 12 (permalink) Old 11-08-2008, 03:06 PM
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what fan?


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post #7 of 12 (permalink) Old 11-08-2008, 03:25 PM
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Some computer fans are temperature controlled. The hotter the environment, the faster they spin. But the temperature range they respond to might be a bit different from regular water temperatures.

You can also control fans via voltage... I use a light dimmer to control line voltage, and connect that to a 12V transformer, so the fans spin accordingly.

Or you can use something like an Antec Tricool that comes with 3 different settings.

Or you can built a temperature controller yourself, kinda like this. Here is a cheap DIY one.


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post #8 of 12 (permalink) Old 11-08-2008, 06:53 PM
 
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Solutions:
a:use a smaller fan
b:move it farther away
c:restrict/block part of the fan
d:aim it less directly at the tank
e:put it on a timer to run for less hours in the middle of the day
f:If its a DC/computer fan, reduce the voltage on it by getting a new ac/dc converter box that runs at like 7v
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post #9 of 12 (permalink) Old 11-08-2008, 11:10 PM Thread Starter
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xGROMx;
it's a 10inch fan
for house hold use...

Wasserpest:
thank you for the link...
I like the DIY part... just need to change the sensor part to the sensor that can be put in water...

SpeedEuphoria:
Thanks for the suggestion...
I'll buy the computer fan first...
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post #10 of 12 (permalink) Old 11-10-2008, 05:04 AM
 
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Quote:
Originally Posted by volkracing99 View Post
just need to change the sensor part to the sensor that can be put in water...
You could just put the thermistor in one of the test tubes I know we all have lying around, add some weight and seal it using silicone about half way though the tube. Then you make a knot in the thermistor wire, pass the wire though a hole in the cap of the testtube and glue that in place (will prevent the thermistor from getting pulled out). You can just clip that on the side of the tank. Since the test tube would not be completely submerged, the weak bond between the wire and silicone shouldn't be a problem.
You could paint the inside of the tube (insert color of choice here) for esthetic reason and if you're into computer modding, some thermal grease can be used to eliminate air pockets around the thermistor and of course increase reaction time.

This is just an idea I have tossing around to convert an indoor/outdoor thermometer to my tank needs.... No clue if it will work as invisioned, yet.

Good Luck.

PPB
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post #11 of 12 (permalink) Old 11-10-2008, 03:44 PM
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find the cheapest thermostat.. Check hardware store etc..
It's basically a circuit that's controlled by a thermometer...

http://www.lowes.com/lowes/lkn?actio...ord=thermostat


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post #12 of 12 (permalink) Old 11-11-2008, 12:00 AM Thread Starter
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Hi everyone...
thank you for all the input.... and suggestion...

I end up installing the small 3-speed computer fan... that connected to the timer... like most of you guys recommended....
This will do for now....

If I have free time, I will try to connect the fan to thermistor, like PPB suggestion, and get the cheapest controller, thanks mistergreen....

these are the pic of the fan..:




Thanks,
K.
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