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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Sat, 15 Feb 2003 02:36:01 GMT
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Viewed:
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3084 times
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Use a powered USB hub with the laptop. The power required for the USB IR
Tower will come from the powered hub, rather than the laptop.
- Rob
In lugnet.robotics.rcx, Pat LaVarre writes:
> Does the Lego USB IR tower, when set to long range, sometimes draw more than
> the 500mA allowed? Or do laptops generally not reliably supply 500mA? Or are
> we facing some deeper analog issue here, like not ramping up to 500mA from less
> mA fast enough to suit the IR tower?
>
> Anybody able to comment?
>
> ---
>
> http://mindstorms.lego.com/support/en/ris20.asp
> http://mindstorms.lego.com/support/en/ris20.asp#3
>
> Special note for Laptop or Notebook users
>
> Laptop computer users may experience issues with the USB IR Tower when trying
> to set it to long-range. This is due to the power consumption required from
> the USB port. Laptops generally do not have sufficient power to enable long
> range for the USB IR Tower. For users who can enable the long-range setting
> for the USB IR Tower, be aware those using the tower will drain the battery on
> the laptop. We recommend using Short or Medium range for the USB IR Tower or
> having he laptop or portable computer plugged into a power source.
>
> ---
>
> Curiously, cluelessly, thankfully yours, Pat LaVarre
>
> P.S. http://news.lugnet.com/robotics/rcx/?q=range+USB+IR+long+Tower
> seemingly doesn't comment.
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Message is in Reply To:
 | | no long range IR from laptop says Lego
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| Does the Lego USB IR tower, when set to long range, sometimes draw more than the 500mA allowed? Or do laptops generally not reliably supply 500mA? Or are we facing some deeper analog issue here, like not ramping up to 500mA from less mA fast enough (...) (22 years ago, 12-Feb-03, to lugnet.robotics.rcx)
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