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	<title>HiTechnic Blog &#187; EOPD</title>
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		<title>EOPD &#8211; How to measure distance</title>
		<link>http://www.hitechnic.com/blog/eopd-sensor/eopd-how-to-measure-distance/</link>
		<comments>http://www.hitechnic.com/blog/eopd-sensor/eopd-how-to-measure-distance/#comments</comments>
		<pubDate>Thu, 29 Apr 2010 17:40:14 +0000</pubDate>
		<dc:creator>Gus</dc:creator>
				<category><![CDATA[EOPD Sensor]]></category>
		<category><![CDATA[Distance]]></category>
		<category><![CDATA[EOPD]]></category>
		<category><![CDATA[NXC]]></category>
		<category><![CDATA[NXT-G]]></category>

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In this post I will show you how to measure distance with the EOPD sensor.  I will explain the math and give you some data and show you how it was analyzed.  Equations for calculating [...]]]></description>
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		<slash:comments>9</slash:comments>
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		<title>WallBot &#8211; NXC Version</title>
		<link>http://www.hitechnic.com/blog/eopd-sensor/wallbot-nxc-version/</link>
		<comments>http://www.hitechnic.com/blog/eopd-sensor/wallbot-nxc-version/#comments</comments>
		<pubDate>Wed, 10 Feb 2010 05:59:22 +0000</pubDate>
		<dc:creator>Gus</dc:creator>
				<category><![CDATA[EOPD Sensor]]></category>
		<category><![CDATA[EOPD]]></category>
		<category><![CDATA[NXC]]></category>
		<category><![CDATA[Trike]]></category>
		<category><![CDATA[Wall Follower]]></category>
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Here is an NXC version of the HiTechnic WallBot. This program is essentially the same as the NXT-G program from the previous post except it does add one small improvement. This version displays on the NXT screen [...]]]></description>
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		<title>WallBot &#8211; an EOPD Based Wall Follower</title>
		<link>http://www.hitechnic.com/blog/eopd-sensor/wallbot/</link>
		<comments>http://www.hitechnic.com/blog/eopd-sensor/wallbot/#comments</comments>
		<pubDate>Wed, 03 Feb 2010 01:49:58 +0000</pubDate>
		<dc:creator>Gus</dc:creator>
				<category><![CDATA[EOPD Sensor]]></category>
		<category><![CDATA[EOPD]]></category>
		<category><![CDATA[Trike]]></category>
		<category><![CDATA[Wall Follower]]></category>
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		<description><![CDATA[The WallBot is wall follower that uses a HiTechnic EOPD sensor to track the wall on the right side of the robot and an Ultrasonic Sensor to detect inside corners.  The robot is based on the new HiTechnic Trike Base.  In this article the program is in the LEGO Mindstorms NXT-G programming language.

So what exactly is the EOPD sensor?  EOPD stands for Electro-Optical Proximity Detector. 

The basic strategy for wall following with the EOPD sensor to determine where the robot is relative to the wall.]]></description>
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