Hi, today I would like to share with you this weekend innovation for my Dream PC. It is a PWM controller for both 4-pin and 3-pin fans. I used cable connector that is very popular, the 30 centimeters long cable with 4-pin input and output connectors. And I decided to put between that cables a bit of analog electronic hardware. I prepared also for you simple HowTo Picture below, because it is very easy to build in my opinion and it resolves the issue of the fan speed control and allow even 0dB solution for 200×200 fans that are never PWM 4-pin and always only 3-pin without speed control.
When you connect your fan make sure you have potentiometer in mid position. Then you can calibrate your fans and decide if potentiometer has higher value and that allow fans spin faster or if it has lower value and that slow down your fans. Enjoy and thanks for reading!