Re: [NTLK] (Slightly OT) Power via USB

From: Adriano (adriano.angelillis_at_gmail.com)
Date: Tue Jan 03 2006 - 08:21:24 PST


Il giorno 02/gen/06, alle ore 12:12, Jon Scordia ha scritto:

> Hi list. And especially Adriano, who's NewtUSB product is one element
> of this query....
>
> Firstly Happy New Year to everyone!

Happy New Year Jon!

> I assume that USB power from, say a laptop, mac or PC, is going to
> be a standard and therefore (Adriano?) safe source of the correct
> voltage/current. Particularly to the Newton. Being a dumb cable it'll
> simply pass whatever the car cigarette lighter puts out. Is this a
> safe source of power?

USB power is limted to 5V at 500mA and every desktop/laptop must be
built respecting such specs.

When buying an usb charger say made for car or wall use, you will
need to be sure that the adapter respects above mentioned specs
cause often i find usb car chargers which can charge 5V at 1.3A and
could ruin your MessagePad, iPod, mobile, etc.

Kind regards,

Adriano Angelillis

'Green is better'
http://www.homepage.mac.com/adriano.angelillis/

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