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### Author Topic: Fan controller  (Read 17818 times)

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#### ketske

• Newbie
• Posts: 34
##### Fan controller
« on: June 12, 2012, 23:06:01 PM »
Hello there!

My name is kenneth.
I am fascinated by electronics.

I have a project , my ps3 had ylod, i fluxed and flowed my console , succes.
Now i want to build a simple way like the rotary 4 way switch with resistors like the video.

Well my ps3 fan is 12vDC 1.76A= (6.78Ohms)
I wanna do it just like the one in the video .

Last idea, can i make one with a potentiometer btw?

#### kam

• Hero Member
• Posts: 1849
##### Re: Fan controller
« Reply #1 on: June 12, 2012, 23:07:29 PM »
hello kenneth,
for which video with rotary encoder you speak about?

#### ketske

• Newbie
• Posts: 34
##### Re: Fan controller
« Reply #2 on: June 12, 2012, 23:09:51 PM »
Wow that was fast attention , thank you! ( poor english =_=)

#### kam

• Hero Member
• Posts: 1849
##### Re: Fan controller
« Reply #3 on: June 12, 2012, 23:16:45 PM »
Ok i see. Question: are you absolutely sure about the 1.76A? Do you mean 1.76 Watts? Because 1.76A at 12V means 21 watts fan...is it really THAT powerful?

Well, the bad news are that if your fan is 20 watts, you cannot simply dissipate power on some resistors. The power is too high. The good news are that you can always use a very simply PWM controller with a 555 timer and a few simple components. In that case, you will have a potentiometer. Here is one circuit:

http://www.pcbheaven.com/circuitpages/High_Frequency_PWM_Fan_Controller/

#### ketske

• Newbie
• Posts: 34
##### Re: Fan controller
« Reply #4 on: June 12, 2012, 23:23:13 PM »
Yes , take a look at this :-)

Oh alright
Thanks for the information

if i have questions i will get back to you , thank you very much!

#### ketske

• Newbie
• Posts: 34
##### Re: Fan controller
« Reply #5 on: June 12, 2012, 23:24:41 PM »
but what resistors and etc do i need actually? for to run this 21watts?

#### kam

• Hero Member
• Posts: 1849
##### Re: Fan controller
« Reply #6 on: June 13, 2012, 08:26:40 AM »
You will follow the schematic "What about the 3-wire and the 2-wire fans?". The material list is underneath.

#### ketske

• Newbie
• Posts: 34
##### Re: Fan controller
« Reply #7 on: June 13, 2012, 17:39:51 PM »
Is this material list compatible with the 1.76A(21w) fan ?
Or is there a limit on this ?
So yes how can i calculate this?

thank!s
« Last Edit: June 13, 2012, 17:47:06 PM by ketske »

#### kam

• Hero Member
• Posts: 1849
##### Re: Fan controller
« Reply #8 on: June 13, 2012, 20:48:26 PM »
Q1 is IRF520 which can stand 9Amps.. so you wont have a problem

#### ketske

• Newbie
• Posts: 34
##### Re: Fan controller
« Reply #9 on: June 15, 2012, 20:18:02 PM »
After some search work, i can buy a timer and diodes
but i cant find thos annywhere .

R1   Resistor 1 KOhm 1/4 Watt 5% Carbon Film
R2   1 KOhm potentiometer
R3   Resistor 4.7 KOhm 1/4 Watt 5% Carbon Film
Capacitors
C1   0.1 uF ceramic capacitor  <- and is this 16 volts ?
C2   1 uF 16 Volts electrolytic capacitor

Someone else can find them?

Dutch(holland) site's are  aprecciated

thank you!
« Last Edit: June 16, 2012, 09:31:28 AM by ketske »

#### kam

• Hero Member
• Posts: 1849
##### Re: Fan controller
« Reply #10 on: June 17, 2012, 17:27:22 PM »

#### ketske

• Newbie
• Posts: 34
##### Re: Fan controller
« Reply #11 on: June 17, 2012, 22:54:40 PM »
Thanks alot kam!

#### kam

• Hero Member
• Posts: 1849
##### Re: Fan controller
« Reply #12 on: June 17, 2012, 23:46:09 PM »
you're welcome!

#### ketske

• Newbie
• Posts: 34
##### Re: Fan controller
« Reply #13 on: June 20, 2012, 20:02:56 PM »
ok ive got al components and soldered in place , now i can't read it so good the 3 wire draw.
can someone help me out?

which pin of the timer is  for sample: RST?

can someone explain it a little bit simpler?

thanks!

and what are the zero volts connections about?
« Last Edit: June 20, 2012, 20:14:38 PM by ketske »