That might work for the PWM signal, however you'd still need some electronics as the fan has internal pull-up to 5V and expects it to be pulled low by the PWM signal.
But a small circuit with a Schmitt-trigger inverter IC and some resistors and capacitors might do the trick, for example.
alt Hacker News
That might work for the PWM signal, however you'd still need some electronics as the fan has internal pull-up to 5V and expects it to be pulled low by the PWM signal.
But a small circuit with a Schmitt-trigger inverter IC and some resistors and capacitors might do the trick, for example.