Subject:
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Re: A Generic Idea
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Newsgroups:
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lugnet.robotics
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Date:
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Mon, 6 Jan 2003 23:49:50 GMT
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Original-From:
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Steve Baker <SJBAKER1@AIRMAIL.stopspamNET>
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Viewed:
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875 times
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Rob Limbaugh wrote:
> So, the questions (to me) become:
> 1) Does a cordless phone transceiver pair have the ability
to handle the data rate of a USB device?
The most bandwidth you can get out of a regular analog telephone line is 56Kbaud.
*PROBABLY* you'll do no better than that with a cordless phone. There is no reason
for them to overdesign the radio system to be better than the telephone network - so
we can *GUESS* that it'll do no better than 56Kbaud.
According to www.usb.org, 900kb/s is the peak rate. But most
devices are designed to use only 30 to 40% of that. However, it's
way more data than you can get down a phone line.
So, unless the cordless phone electronics are *WAY* over-designed,
I don't think it's gonna work.
> 2) If answer above is yes, then is it possible to create a wireless USB
> interface using a 2.4GHz transceiver pair from a cordless phone?
I don't think so.
> Then again, why not buy a wireless TCP/IP survellience camera and
> wireless microphone and use TCP/IP through IR to the RCX?
Yes - or (as I suggested a day or two ago) get the teeny-tiny colour
camera from www.thinkgeek.com for $120 which broadcasts an FM NTSC
television signal. You can pick that up using a cheap TV card for
your PC and frame grab the results. The camera is *tiny* and runs
on a single 9 volt battery.
--
---------------------------- Steve Baker -------------------------
HomeEmail: <sjbaker1@airmail.net> WorkEmail: <sjbaker@link.com>
HomePage : http://www.sjbaker.org
Projects : http://plib.sf.net http://tuxaqfh.sf.net
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