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 a cable connector that is very popular, the 30 centimeters long cable with 4-pin input and output connectors. And I decided to put a bit of analog electronic hardware between those cables. I have prepared a simple HowTo Picture below for you because it is straightforward to build, in my opinion. It resolves the issue of the fan speed control issue and allows even a 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 the potentiometer has a higher value that allows fans to spin faster or if it has a lower value that slows down your fans. Enjoy and thanks for reading!