Computer fan speed control pot?

N

NormL

Guest
Hi All;
I installed another fan in my computer case. Now it sounds like a Jumbo
Jet taking off. I realised that I only need the fan when the weather is hot.
I got to wondering if I couldn't install a pot in series with the fan to
slow down it's speed and, by turning slower, quiet it down.

Trouble is I don't know what size of pot (in ohms) to put in the line.
Any suggestions?

Norm
 
"NormL" <None@nowhere.com> wrote in message
news:d6v8l8$4tj$1@domitilla.aioe.org...
Hi All;
I installed another fan in my computer case. Now it sounds like a Jumbo
Jet taking off. I realised that I only need the fan when the weather is
hot.
I got to wondering if I couldn't install a pot in series with the fan to
slow down it's speed and, by turning slower, quiet it down.

Trouble is I don't know what size of pot (in ohms) to put in the line.
Any suggestions?

Norm
Click to expand...
There's all sorts of things you can do.

Have a look at
http://www.cpemma.co.uk/index.html

Or consider an off the shelf item like
www.zalman.co.kr/eng/product/view.asp?idx=70&code=017

IMHO pots present problems, either use PWM or a switched diode voltage
dropper

Rob
 
"NormL" <None@nowhere.com> wrote:

Hi All;
I installed another fan in my computer case. Now it sounds like a Jumbo
Jet taking off. I realised that I only need the fan when the weather is hot.
I got to wondering if I couldn't install a pot in series with the fan to
slow down it's speed and, by turning slower, quiet it down.

Trouble is I don't know what size of pot (in ohms) to put in the line.
Any suggestions?

Norm

I don't have a direct answer to your question but I installed a second
Click to expand...
fan and DPDT Center Off switch to switch them in series, parallel or
off. It works well so I guess that a pot of about the same resistance
as your fan should be OK.
 
Or... try here?.....

http://www.almico.com/speedfan.php


"NormL" <None@nowhere.com> wrote in message
news:d6v8l8$4tj$1@domitilla.aioe.org...
Hi All;
I installed another fan in my computer case. Now it sounds like a Jumbo
Jet taking off. I realised that I only need the fan when the weather is
hot.
I got to wondering if I couldn't install a pot in series with the fan to
slow down it's speed and, by turning slower, quiet it down.

Trouble is I don't know what size of pot (in ohms) to put in the line.
Any suggestions?

Norm
Click to expand...
 
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