Magellan GPS - Re: A portable GPS should use standard mini-USB power (but which

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Re: A portable GPS should use standard mini-USB power (but which

Ron Hunter

2007-05-31, 7:33 am

Dominic Sexton wrote:
> In article < 135rfi1d41ee19c@corp
.supernews.com>, Dale DePriest
> <Dale@gpsinformation.het> writes
>
> The USB specifications require that USB ports or host controllers and
> powered hubs have in built current limiting to ensure that the port (and
> the host / hub) are not damaged by devices connected to the port
> attempting to draw too much current.
>
> No damage will occur to hardware that adheres to the specifications no
> matter what load is connected to the power supply from the port.
>
Yes, however, the device in question will NOT function. Note that not
all USB ports have power available, and when one 'extends' the USB
ports, say to a keyboard, or monitor, the power is often either less
than 500mA, or absent entirely.

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