usb, turn off & on

[allan1957]

does any one know if it is possible to disable usb port, example: leave something plugged in, then switch the usb port to on/off

[Dias de verano]

Is this the scanner again?

Have you tried "stop removable device"?

There are software apps like USB Safely Remove which extend the functionality.

[allan1957]

yes, sorry to say it is my scanner again, i am not a super kid on computers, how do do that, stop removable devise, thanks

[Dias de verano]

Near the clock

[allan1957]

Thanks, i will try this

[KingPincer]

I thought he was saying to disable his USB port so that it can't read USB's anymore.

[Dias de verano]

so that it can't read USB's anymore.

What does that mean?

He wants to shut off his USB port-powered scanner.

[Carbon Dudeoxide]

Why not shut off the scanner? Save some power.

Or better yet, unplug the scanner to free up a USB Port.

[Dias de verano]

Why not shut off the scanner? Save some power.

Or better yet, unplug the scanner to free up a USB Port.

This started in another thread. The scanner has no on/off button. It is powered from the port, and consumes 1.5W standby,  2.5W operating. I asked why he does not just unplug it, he says he wants to leave it connected but be able to stop the power drain. Personally I'd unplug it.

[Carbon Dudeoxide]

If the scanner is plugged in, it will always consume power, whether or not it is hooked up to the computer.

[allan1957]

this scanner is usb lead only,does not plug in, i am trying to be clever and leaving the scanner plugged into the computer without unplugging every time, just wandering if there is a easy way of switching off a usb port  and the switch back on.

[Carbon Dudeoxide]

just wandering if there is a easy way of switching off a usb port  and the switch back on.

Apparently not.

And one more thing, are you sure the scanner is not plugged into the mains? I find that slightly hard to believe, though there are portable scanners out there....

[allan1957]

my canon lidi 35 is powered by the usb lead only, hence no mains plug required

[Carbon Dudeoxide]

Not bad.

If you've got a laptop, those things are meant to be unplugged, and should be unplugged.
Otherwise, with a Desktop computer, just leave it in.

[Dias de verano]

Apparently not.

And one more thing, are you sure the scanner is not plugged into the mains? I find that slightly hard to believe, though there are portable scanners out there....

Carbon, we covered all this in the other thread. The OP has a Canon LiDE 35 (correct spelling) scanner which is powered from the USB port. The OP wanted to know how to turn it off when he wasn't using it. I suggested either unplugging it or getting a switched hub. Evidently he didn't like the answers so he started another thread.

The scanner in question is stated to consume 1.5 Watts on standby, and 2.5 Watts when operating. At 5 volts, these represent currents of 300 mA and 500 mA respectively. As the USB specification allows a maximum current draw of 500 mA per segment, that should not be a problem, as long as no other device is downstream when maximum current is being drawn.

[Carbon Dudeoxide]

Carbon, we covered all this in the other thread.

Ah, now looking at the other topic, I understand.

Allan1957, in short, No.