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    how many ohms resistor do i need for this fan?

    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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    Re: how many ohms resistor do i need for this fan?

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



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    Re: how many ohms resistor do i need for this fan?

    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?




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    Re: how many ohms resistor do i need for this fan?

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



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    Re: how many ohms resistor do i need for this fan?

    newegg.com




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    Re: how many ohms resistor do i need for this fan?

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




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    Re: how many ohms resistor do i need for this fan?

    Quote Originally Posted by Ku-sama View Post
    they run on 12V, get one that resists to 6-9V
    a 2-ohm resistor would drop the voltage down to 6 volts right?




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    Re: how many ohms resistor do i need for this fan?

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




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    Re: how many ohms resistor do i need for this fan?

    why the *** 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


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    Re: how many ohms resistor do i need for this fan?

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




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    Re: how many ohms resistor do i need for this fan?

    http://www.jameco.com/webapp/wcs/sto...roductId=29066

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



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    Re: how many ohms resistor do i need for this fan?

    http://www.newegg.com/Product/Produc...82E16811998129

    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.




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