Speed controlling computer fans
For years I have been using the Silverstone fm121 as it comes with a remote mounted speed controlling potentiometer, goes as high as 110 CFM and 0.4 amps consumption. It is fairly quiet for this am...
Forum Discussion
I have about 5 of those LED PWM dimmers on hand. They have made every fan I have used them with Whine annoyingly loud when the rpms are reduced. I can't tolerate the whine. I guess it is the windings in the motor whining. Perhaps the Noctua's IP67 rating would prevent the whining.
The 25 KHZ PWM 10 amp motor speed controllers, well the whine was outside my hearing range, but they released their smoke due to bumbling jackassery on my part.
These controllers had some heatsinks( with no thermal grease) and they would get quite hot powering the screaming banshee, but the LED dimmer had no heatsinks and had no issues powering this fan and did not get hot. No idea about this discrepancy. 13 vs 25KHZ?
I think I once measured the output and it was the ground on the LED dimmer out, which did the PWM thing. Would it be possible to feed the fan battery voltage on the red and black and use the (-) output from the dimmer to the blue PWM wire?
I see the computer fan speed controllers marketed as such are rather expensive.
I just want the full speed control throughout the full possible ranges of the fans, including the screaming banshee, adjustable via a remote potentiometer. I thought perhaps it was better or allowed more rpm range to use the provided PWM wire on the fans to control speed rather than running red and black into a motor speed controller and then to fan.
I could order more of the 25KHZ motor speed controllers but they are kind of bulky, exposed and fragile, and this led to their previous demise, with the addition of sufficient bumbling jackassery on my part.
Also the Screaming banshee Fan was not able to be tamed sufficiently on these. I'd love to tame the screaming banshee to tolerable noise and amperage consumption levels, but at the minimum speed via the 25KHZ controller, it was still way too powerful, noisy and an Ampwhore.
The LED dimmer, it would cut out at the same exact speed on the screaming banshee and read about 5.6 volts on my DMM when it cut out, though I know this is not an accurate voltage reading..
The 25 KHZ PWM 10 amp motor speed controllers, well the whine was outside my hearing range, but they released their smoke due to bumbling jackassery on my part.
These controllers had some heatsinks( with no thermal grease) and they would get quite hot powering the screaming banshee, but the LED dimmer had no heatsinks and had no issues powering this fan and did not get hot. No idea about this discrepancy. 13 vs 25KHZ?
I think I once measured the output and it was the ground on the LED dimmer out, which did the PWM thing. Would it be possible to feed the fan battery voltage on the red and black and use the (-) output from the dimmer to the blue PWM wire?
I see the computer fan speed controllers marketed as such are rather expensive.
I just want the full speed control throughout the full possible ranges of the fans, including the screaming banshee, adjustable via a remote potentiometer. I thought perhaps it was better or allowed more rpm range to use the provided PWM wire on the fans to control speed rather than running red and black into a motor speed controller and then to fan.
I could order more of the 25KHZ motor speed controllers but they are kind of bulky, exposed and fragile, and this led to their previous demise, with the addition of sufficient bumbling jackassery on my part.
Also the Screaming banshee Fan was not able to be tamed sufficiently on these. I'd love to tame the screaming banshee to tolerable noise and amperage consumption levels, but at the minimum speed via the 25KHZ controller, it was still way too powerful, noisy and an Ampwhore.
The LED dimmer, it would cut out at the same exact speed on the screaming banshee and read about 5.6 volts on my DMM when it cut out, though I know this is not an accurate voltage reading..
