Which numbers of pin is available with pwm?

Sitaylik · Post by **Sitaylik** » Wed Dec 18, 2019 2:28 pm

It work good but sound on 1-244 is annoying.

Post by **William** » Wed Dec 18, 2019 2:36 pm

Hi, Is it the sound of the cooling fan on the motherboard?
Can you provide specific videos?

Sitaylik · Post by **Sitaylik** » Wed Dec 18, 2019 9:15 pm

Sorry for vertical video.
https://youtu.be/xCEtrG0Q4oE

Post by **William** » Thu Dec 19, 2019 9:15 am

Hi, It looks like every fan is working.

Sitaylik · Post by **Sitaylik** » Thu Dec 19, 2019 3:03 pm

Yes, it working but im talking about the noise. Not exactly from fan when it cooling. But the noise when the fan controlled by PWM at low values 0-38 does not rotate but makes a sound from the pulse frequency of the PWM.
https://youtu.be/peBKzSSdqPE

Post by **William** » Thu Dec 19, 2019 3:22 pm

Hi, I find this:
When the PWM pulse is turned on, the fan torque will change step by step, and the curve of the change process matches the rise time of the PWM pulse.

Shock torque is considered noise by the fan structure.

The lower the PWM duty cycle, the greater the percentage of time the fan is stopped (quiet), so the noise caused by the PWM signal becomes more obvious.

Post by **William** » Wed Dec 25, 2019 9:42 am

Hi, Q5 position on the GT2560 V3.0 motherboard.

: IMG_20191225_093954.jpg (278.46 KiB) Viewed 4045 times

Geeetech

Which numbers of pin is available with pwm?

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Re: Which numbers of pin is available with pwm?