Raising the fan speed on the other hand may lower the temperature but increase the noise the fan makes.Ī click on options displays a number of settings. Lowering the fan speed may increase the temperature of the component and lower the noise of the fan at the same time. You could lower or raise the fan speed of a component using the fan control fields. Just click in a field and type to change the value. You can rename device and fan names for better identification, and change the fan control value easily. The temperature of each component, as reported by the component or motherboard, and the fan speed is listed by the program. I ran it on several systems to get a feel for it it supports plenty of hardware components including processors, video cards, and motherboards.
The program displays the temperature of components that it detected on start and the fan speed of those components. NET Framework 4.6 but can be run from any location.įanCtrl works similarly to Speedfan. For video card fans, I used MSI Afterburner, a free software for all video card manufacturers.įanCtrl is a free program for Windows. I used the free tool Speedfan about a decade ago to control fans on Windows PCs to reduce the noise these fans generated. The maximum speed will be lower than the one obtained without the control circuit.While that is necessary to keep components from overheating, it is sometimes problematic because of the noise that these fans make. When the temperature increases so will the rotation speed of the PC fan. If this won’t happen modify the value of R2 or adjust a potentiometer placed instead of R2. When the temperature reaches 35☌ the controller circuit will start to work.
Measure with a thermometer the air temperature close to the sensor. When the PC is connected the speed rotation of the fan will be pretty high because of C1 but will decrease at a minimum value. Place the temperature sensor in the warm air of the fan. Schematic of the PC Fan Controller Circuit It may be useful to connect a 25kΩ potentiometer instead of R2 and to adjust it until the PC fan is at the correct speed and to measure its resistance and then replace it with a fix resistor with the same value.
T1 and T2 transistors compare the fixed potentional from R3-R4 common point with the temperature dependent potentional of R1-R2 common point. If the PC fan has a speed too high then increase the R7 value. If the fan won’t start at 25☌ then temporarily replace the temperature sensor KTY10 with a 1.8kΩ resistor and reduce the value of R7. With the components values presented in the circuit diagram, the voltage won’t drop below 7V. This PC fan controller circuit is designed with discrete components and is used to control 12 V fans that have a current consumption lower than 200mA.
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