how many ohms resistor do i need for this fan?

[hello again 10+ year member]

hewwo,

my name hewo again.
i would like ask you what variable resisitor rheostat potentiometer to get if i have fan that say 12V DC 0.13 amp. I plan to use spare computer power supply. If i have this fan and I plan to splice wire to hook up directly to power supply, what OHM resistor do i use to control the speed of fan? ten q very much

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[ultimate157 5,000+ posts]

Why bother going through all the difficulty, just use a relay and the remote wire as the signal.

 

[hello again 10+ year member]

this fan will not be going in a car it will be for a personal project of mine. would like to control computer fans with computer power supply by using variable resistors.. know a better and cheaper way?

 

[ultimate157 5,000+ posts]

Buy a fan speed controller available on most computer websites...

 

[Ku-sama]

newegg.com

 

[Ku-sama]

they run on 12V, get one that resists to 6-9V

 

[hello again 10+ year member]

they run on 12V, get one that resists to 6-9V

a 2-ohm resistor would drop the voltage down to 6 volts right?

 

[Ku-sama]

don't know ohm=V, just look for one that says 6 or 9 v

 

[Decipha 10+ year member]

why the fuk would you use a resistor??? the power supply has a 12v feed... the fan is rated at 12volts... the fan will only draw what it needs... no resistor needed

btw every power supply has a 5v output as well... if you really want to u can hook it up to that

/thread

 

[Flipx99 5,000+ posts]

OT, but do these computer places have some with a thermostat?

 

[GemaRastem 10+ year member]

http://www.jameco.com/webapp/wcs/stores/servlet/ProductDisplay?langId=-1&storeId=10001&catalogId=10001&productId=29066

that one will work well, should be able to go from full speed to stopped.

 

[req 5,000+ posts]

http://www.newegg.com/Product/Product.aspx?Item=N82E16811998129

there you go. $7 and you dont have to worry about what parts fit what. i know you can get a rheostat or potentiometer, but this solves all problems.