Re: usb lamp

Newsgroups	comp.os.linux.hardware
From	Rikishi42 <skunkworks@rikishi42.net>
Subject	Re: usb lamp
References	<itt7qh$err$1@speranza.aioe.org> <9cq9d8-742.ln1@pc.home> <ittkmv$hq6$1@speranza.aioe.org>
Message-ID	<qs3id8-4f5.ln1@murmur.very.softly> (permalink)
Organization	telenet.be
Date	2011-06-26 00:26 +0200

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On 2011-06-22, pete <pete@localhost.domain> wrote:
> On 06/22/2011 02:54 PM, Hactar wrote:
>> In article<itt7qh$err$1@speranza.aioe.org>,
>> pete<pete@localhost.domain>  wrote:
>>> hi all,
>>> can anyone recommend good and cheap LED usb lamp, which I would be able
>>> to turn on and off via software?
>>
>> How cheap is cheap?  Linux, right?
>>
> ok . skip cheap...
> hi all,
> can anyone recommend good LED usb lamp, which I would be able to turn on 
> and off via software?

Good luck finding that... 

Most LED lamps will be simple devices that only use the power lines of the
USB port, no data transfer.

I don't think you can switch off the power lines in a USB port, and if you
could, you'd probably switch them all off. Goodbye mouse (and maybe
keyboard).

It _is_ possible to build a LED lamp that has a switch in it.

But you'd need electronics to communicate over USB, and on receiving the
correct command, switch the lamp on or off.

That in turn means you need software. A user interface to accept you choice
and a driver to translate it to a command over USB, to the correct device.

Not rocket science. But even if some company would build it, what are the
chances of them including a Linux release of their soft?  

PS: if you do find one, let us know.

-- 
When in doubt, use brute force.
                -- Ken Thompson

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Thread

usb lamp pete <pete@localhost.domain> - 2011-06-22 13:13 -0400
  Re: usb lamp ebenZEROONE@verizon.net (Hactar) - 2011-06-22 14:54 -0400
    Re: usb lamp pete <pete@localhost.domain> - 2011-06-22 16:54 -0400
      Re: usb lamp Rikishi42 <skunkworks@rikishi42.net> - 2011-06-26 00:26 +0200
      Re: usb lamp J G Miller <miller@yoyo.ORG> - 2011-06-25 23:53 +0000
        Re: usb lamp Gordon <gonzo@alltomyself.com> - 2011-06-27 03:00 +0000
      Re: usb lamp Henrik Carlqvist <Henrik.Carlqvist@deadspam.com> - 2011-06-26 20:04 +0200
  Re: usb lamp Adrian C <email@here.invalid> - 2011-06-26 18:24 +0100

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