Subject:
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[MindStorms FAQ 2.5 Are there other sensors available?]
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Newsgroups:
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lugnet.faq
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Date:
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Wed, 14 Jul 1999 20:35:16 GMT
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Viewed:
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1928 times
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This update just adds the values for the range of the temperature sensor
Subject: 2.5 Are there other sensors available?
Content-Language: en
Topic-Level: 0
Revision: Robert Munafo, 1999-07-14
Location: /robotics/rcx/
Comment: Topic-level is inaccurate pending a reference for topic
levels
<p>There is a temperature sensor that detects temperatures from -20 to
+70 degrees Centigrade (-4 to +158 Farenheit). (At about +80 degrees
Centigrade, the plastic would start to get soft.) It is a 2 x 3 brick
with a rod extending about 3 units out from the brick's end; the end
of the rod is metal. </p>
<p>There is a rotation sensor shaped like a 2 x 4 x 1 2/3 brick that
detects the rotation of an axle inserted through a hole. If you are
using the standard RCX firmware or NQC (see programming answers in
section 3 below), the RCX will automatically keep track of rotations
for you, giving you an integer from 0 to 32767 with each 16
representing one full rotation. </p>
<p>Both types of sensors have non detachable 9V connecting leads. </p>
<p>Both of these sensors are available from the LEGO® World Shop and the
DACTA online store. The DACTA store is geared for educators but they
will sell to anyone. </p>
<p>To get either of these sensors from the LEGO® World Shop, go to </p>
<blockquote><a href="http://www.legoworldshop.com/">
http://www.legoworldshop.com/ </a></blockquote>
<p>then select your region and country, then choose LEGO® MindStorms. </p>
<p>For the DACTA online store, go to </p>
<blockquote><a href="http://www.pitsco-legodacta-store.com/">
http://www.pitsco-legodacta-store.com/ </a></blockquote>
<p>then select "Spare Parts", then select "Sensors". </p>
<p>The fiber optic unit (included in the Extreme Creatures expansion set
mentioned above, and included in other LEGO® Technic sets) can also be
used as a rotation sensor. If connected to an input instead an output,
it acts like a touch sensor which is periodically touched and
released, a total of 8 touches and releases per rotation. If you
happen to know what direction you are rotating in and if you are
programming in RCX or a more hardcore programming method (see section
3 below) you can use this to keep track of rotation and accomplish
most of the results you would get from a real rotation sensor. </p>
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