[sdiy] usb power?

[Loscha]

http://en.wikipedia.org/wiki/USB#Power
"A unit load is defined as 100 mA in USB 2.0, and was raised to 150 mA
in USB 3.0"

 Stick to around 100 mA and you should be sweet.

-ErJ

On 3/22/09, db <dbarton at pacbell.net> wrote:
>
>  I want to power some lights from my laptop. These lights are a bank of 25
> leds, designed to run at 4.5 volts
>
>  How can I tell how many of these are ok to power from usb?
>
>  I'm guessing a usb hard drive pulls more current than even 100 LEDs, no?
>
>  dennis.barton:skylab2000[socal]
>
>
>
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