Closed ghandye closed 1 year ago
Section 2.1.4 of the 2005 Intel standard for 4-pin PWM fans specifies 25 kHz as the PWM frequency.
https://www.intel.com/content/dam/support/us/en/documents/intel-nuc/intel-4wire-pwm-fans-specs.pdf
Many PWM fans will not operate at the previous default of 30 Hz, and the new hardware PWM implementation can easily support 25 kHz, so updating the PiFire default to match the published specifications for PC PWM fans seems prudent.
Section 2.1.4 of the 2005 Intel standard for 4-pin PWM fans specifies 25 kHz as the PWM frequency.
https://www.intel.com/content/dam/support/us/en/documents/intel-nuc/intel-4wire-pwm-fans-specs.pdf
Many PWM fans will not operate at the previous default of 30 Hz, and the new hardware PWM implementation can easily support 25 kHz, so updating the PiFire default to match the published specifications for PC PWM fans seems prudent.