Subject:
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FW: Another DIY sensor
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Newsgroups:
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lugnet.robotics
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Date:
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Sat, 18 Nov 2000 04:04:41 GMT
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Original-From:
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Phil Vanderpoel <philbert@scottsbluff.STOPSPAMMERSnet>
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Reply-To:
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<philbert@scottsbluff.net=stopspammers=>
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Viewed:
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883 times
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I was throwing a mouse away the other day and instead took it apart to see
what makes it tick, well, it's a perfect rotation sensor. I think it will
be almost twice as accurate as the lego rotation sensor, more as this
project develops. I think it could be applied to the compass problem, but
you wouldn't get absolute accuracy, about 12 degrees would be the best you
could hope for. Also, I made a couple of light sensors from Radio Shack CDS
Photocells, Part No 276-1675, (under $3) they are more sensitive than the
lego light sensor and look pretty cool too. I'll get photos.
phil
-----Original Message-----
From: John Barnes [mailto:barnes@sensors.com]
Sent: Thursday, November 16, 2000 3:39 PM
To: lego-robotics@crynwr.com
Subject: Re: Another DIY sensor
Umm.
> Did you consider buying a $5 computer mouse and gutting it?
No I didn't! My laptop has a glide point thingy so I don't have box
full of dead mice! . But I should investigate! Thanks for the idea.
> What would be really cool would be to find a way to get the
> RCX to read RS-232 - then you could just duct-tape the whole
> mouse underneath your robot!
That reminds me. A while ago now, someone here suggested trying
out the guts of one of those ball-less optical mice as the basis for
a sensor to watch the floor go by under the robot. Did that get
anywhere? Does anyone even know how those things work? Are
they still $50?
JB
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Message has 1 Reply:
 | | Ball-less mice (was :Re: FW: Another DIY sensor)
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| The optical mice that do not require a special tablet to operate all use the same sensor, made by Agilent (formaly HP). It is the HDNS2000. The spec can be found here: (URL) this thing has 2 types of output: - PS/2 (connects directly to a PC) (used (...) (24 years ago, 28-Nov-00, to lugnet.robotics)
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