Fan Diagram Pc Solutions. Pci bracket fan controller. Were talking about physics thermodynamics all sorts of fun stuff.
4 wire fans explained. For estimating fan power consumption and noise. It may be found convenient initially to place 25 1q potentiometer meter in the r2 position adjust this till the fan runs correctly measure the resistance and then replace it by a fixed resistor of that value.
The max6650 can work as a fan speed controller or a fan speed regulator.
A 10kω pot is connected between supply and pin 7 with wiper of the pot connected to pin 7. The pwm signal from the motherboard sources 5v during the on state of the pulse otherwise its pulled to ground. The tachometer signal also known as tach signal and fg signal conveys rpm information in the form of square waves. Or and not ladder logic.