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acpi package

managing power output on usb

Asked by viktor133

Dear all,

I've bought a usb-powered cooling pad for my laptop. The laptop is a toshiba sattelite a100-534, usb 2.0. I would like to be able to have some control over the cooling pad. So i would like to know if it's possible to manage power output on a specific usb-port? If anybody can help me with that, thank you very much.

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mycae
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Best mycae (mycae) said : 		#1

I don't think the USB ports are current controlled. They are fixed voltage, so if this is true the only thing that you could do would be to PWM your outputs - to do this in software could well blow up your controller -- I would be hesitant ot try this.

If you actually need control, you are probably going to need new hardware with current-control.

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viktor133 (viktor133) said : 		#2

i guess that's not really worth the price for dimming the fan on my cooling pad.

thanks for the info

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viktor133 (viktor133) said : 		#3

Thanks mycae, that solved my question.