Subject:
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Re: no long range IR from laptop says Lego
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Newsgroups:
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lugnet.robotics.rcx
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Date:
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Wed, 12 Feb 2003 20:24:25 GMT
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Viewed:
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2768 times
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"Pat LaVarre" <ppaatt@aol.com> writes:
>
> Kindly offline I am informed: yes indeed, some laptop designs have been seen
> to support less than half of the specified 500mA max load for USB bus power.
>
> I wonder how many mA the USB IR tower does need.
Its USB descriptors say there are two configurations with 100mA
(I think these are for low and medium power),
and two that require 500mA (high power mode).
The LEGO USB Tower Interface Reference doesn't go into more details.
Jürgen
--
Jürgen Stuber <stuber@loria.fr>
http://www.loria.fr/~stuber/
I åa ä e ö å i öa ä e å.
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Message has 1 Reply:
 | | Re: no long range IR from laptop says Lego
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| (...) Fascinating stuff, thanks again. In particular, I didn't know Anyone had persuaded Windows to respond intelligently to Usb Configuration's of variable power. Anybody know if these descriptors already appear on the web somewhere? Else please (...) (22 years ago, 13-Feb-03, to lugnet.robotics.rcx)
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Message is in Reply To:
| | Re: no long range IR from laptop says Lego
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| Kindly offline I am informed: yes indeed, some laptop designs have been seen to support less than half of the specified 500mA max load for USB bus power. I wonder how many mA the USB IR tower does need. Pat LaVarre (22 years ago, 12-Feb-03, to lugnet.robotics.rcx)
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