Good Day All.
I want to control the fan speed of my server with ref to the internal temp, but I have come across a problem.
The server monitors the fan speeds at all times, if the fan(s) stop or start giving strange readings the server will shut down, this can not be adjusted in the servers bios.
Wile testing I have been able to lower the fan speeds right down by using the 5v rail and not the 12volt rail, the server has no problem with this.
As I want to control the fans speed with ref to the temps, I tried running the fans via PWM, The fans do run fine, but you can here a high pitch squeel form them, but the server does not like this and shuts down.
So is it possible to hold the fan at 5volts, and then using PWM to give me a range from 5-12volts, so that the fan has always go at least the 5volt when the PWM switches off.
Thanks for your time.
Best Regards.
I want to control the fan speed of my server with ref to the internal temp, but I have come across a problem.
The server monitors the fan speeds at all times, if the fan(s) stop or start giving strange readings the server will shut down, this can not be adjusted in the servers bios.
Wile testing I have been able to lower the fan speeds right down by using the 5v rail and not the 12volt rail, the server has no problem with this.
As I want to control the fans speed with ref to the temps, I tried running the fans via PWM, The fans do run fine, but you can here a high pitch squeel form them, but the server does not like this and shuts down.
So is it possible to hold the fan at 5volts, and then using PWM to give me a range from 5-12volts, so that the fan has always go at least the 5volt when the PWM switches off.
Thanks for your time.
Best Regards.